Academic literature on the topic 'Resin decomposition'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Resin decomposition.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Journal articles on the topic "Resin decomposition"
1
Tian, Xiu Juan. "Thermal Stabilities and the Thermal Degradation Kinetics Study of the Flame Retardant Epoxy Resins." Advanced Materials Research 1053 (October 2014): 263–67. http://dx.doi.org/10.4028/www.scientific.net/amr.1053.263.
Full textAbstract:
Thermal stability and thermal degradation kinetics of epoxy resins with 2-(Diphenylphosphinyl)-1, 4-benzenediol were investegated by thermogravimetric analysis (TGA) at different heating rates of 5 K/min, 10 K/min, 20 K/min and 40 K/min. The thermal degradation kinetic mechanism and models of the modified epoxy resins were determined by Coast Redfern method.The results showed that epoxy resins modified with the flame retardant had more thermal stability than pure epoxy resin. The solid-state decomposition mechanism of epoxy resin and the modified epoxy resin corresponded to the controlled decelerating ځ˽̈́˰̵̳͂͆ͅ˼˰̴̱̾˰̸̵̈́˰̵̸̳̱̹̽̾̓̽˰̶̳̹̾̈́̿̾̓ͅ˰̶˸ځ˹˰̵̵͇͂˰̃˸́˽ځ˹2/3. The introduction of phosphorus-containing flame retardant reduced thermal degradation rate of epoxy resins in the primary stage, and promote the formation of carbon layer.
2
Jiang, Jianliang, Jingbo Shen, Xiao Yang, Dongqi Zhao, and Yakai Feng. "Epoxy-Functionalized POSS and Glass Fiber for Improving Thermal and Mechanical Properties of Epoxy Resins." Applied Sciences 13, no. 4 (February 14, 2023): 2461. http://dx.doi.org/10.3390/app13042461.
Full textAbstract:
To improve the thermal and mechanical properties of epoxy resins, epoxy-functionalized POSS (E-POSS) and glass fiber (GF) were used to reinforce epoxy resin (E51) composites. The tensile, thermo-mechanical, fractured, and thermal tests were carried out to characterize these hybrid materials. The results show that E-POSS and GF could significantly improve the mechanical and thermal properties of epoxy resins due to high crosslink density of resin matrix and synergistic interaction between the epoxy resin, E-POSS, and GF. Compared with the pure E51 resin, the tensile strength of the E51 + E-POSS (10%) + GF (16%) sample increased by 257.6%, and the thermal decomposition temperature (Td5%) of the E51 + E-POSS (10%) + GF (16%) sample increased by 32 °C to 378 °C.
3
Chowdhury, A., S. K. Singh, and P. Anthony. "Structural and Thermal Characterization of Castor Oil Based Unsaturated Polyester Resin." Asian Journal of Chemistry 32, no. 7 (2020): 1763–67. http://dx.doi.org/10.14233/ajchem.2020.22689.
Full textAbstract:
In the present study, unsaturated polyester resins based on castor oil was synthesized. Structure elucidation of the synthesized unsaturated polyester resin was done by FTIR and 1H NMR spectroscopy. Thermogravimetric analysis was used to evaluate the thermal stability of cured unsaturated polyester resin. Thermogram plot was further utilized to calculate various other parameters such as statistic heat-resistant index (Ts) and the integral procedural decomposition temperature (IPDT). Comparable properties with respect to commercial resins were reported for the synthesized polymers
4
Yang, Jie, Xin Mao, Lirong Du, Bo Wu, Fangfang Zhang, Wencheng Hu, and Xianzhong Tang. "Thermally stabilized bismaleimide–triazine resin composites for 10-GHz level high-frequency application." High Performance Polymers 30, no. 7 (September 22, 2017): 833–39. http://dx.doi.org/10.1177/0954008317732396.
Full textAbstract:
A hybrid cured resin with excellent dielectric and thermal properties was prepared with bismaleimide–triazine (BT) resin modified with 2,2′-diallylbisphenol A (DBA). The thermal and dielectric properties of the resin were investigated, and the effect of DBA concentration on the curing reaction was determined. Results indicated that DBA significantly influenced the curing reaction and the properties of the cured product. The modified BT resins exhibited outstanding thermal stability (initial decomposition temperature was over 400°C), although the stability was slightly lower than that of pure BT resins. The dielectric constant and dielectric loss of the cured resin decreased when DBA was introduced into the BT resins. Moreover, the fabricated resins showed dielectric constant of 2.91–3.07 and dielectric loss lower than 0.0057 under the testing high-frequency range of 1 GHz to 15 GHz. Overall, the BT resins modified by DBA display great potential to be applied in high frequency field.
5
Kim, Ji Hyun, Bhum Keun Song, Kyoung Jae Min, Jung Chul Choi, and Hwa Seong Eun. "Optimizing Heat Treatment Conditions for Measuring CFRP and GFRP Resin Impregnation." Materials 15, no. 22 (November 17, 2022): 8182. http://dx.doi.org/10.3390/ma15228182.
Full textAbstract:
As the use of carbon-fiber-reinforced plastic (CFRP) and glass-fiber-reinforced plastic is frequent in the field of construction, a method for measuring FRP resin content is needed. Herein, thermal gravimetric analysis (TGA) was employed to optimize the heat treatment conditions (temperature and time) for determining the resin content in which only the resin was removed without fiber heat loss. Accordingly, the measurement was performed in 100 °C increments at a resin pyrolysis temperature up to 800 °C with a heat treatment time of 4 h to continuously observe the degree of thermal decomposition of the resin. The thermal decomposition of unsaturated polyester was confirmed at the melting point (350 ℃) regardless of the type of fibers used as reinforcement. In the case of CFRP, most of the resin decomposition occurred at 300 °C. Notably, the resin was removed at a pyrolysis temperature of 400 ℃ and almost no change in weight was observed. However, at a pyrolysis temperature of 500 °C or higher, the thermal decomposition of the fibers occurred partially. The results show that the composite resin was removed within 10 min at a pyrolysis temperature of 400 °C in an air atmosphere when using TGA.
6
Li, Zhishi, Huajin Wang, Sheng Zhang, Wei Zhao, Qinghuai Jiang, Mingqiang Wang, Jun Zhao, and Wei Lu. "Smoke density evaluation of acrylic resin and intumescent flame retardant coatings." Pigment & Resin Technology 45, no. 2 (March 7, 2016): 86–92. http://dx.doi.org/10.1108/prt-03-2014-0023.
Full textAbstract:
Purpose – This paper aims to discuss how acrylic resin influences the smoke generation of intumescent flame retardant coatings. Design/methodology/approach – Thermal decomposition kinetics is used in this study to simulate the burning process. The thermal decomposition of acrylic resin can be identified in the intumescent coatings through the multi-peak fitting of derivative thermogravimetric (DTG) curves. The dormant influence of acrylic resin, combined with the smoke density, is calculated. Findings – Multiple peaks fitting method of DTG curves helps estimate the decomposition process of acrylic resin in flame retardant coating. Combining DTG data with the smoking curve, smoking generation of acrylic resin during the combustion could be evaluated. The decomposition conversion rate of acrylic resin is 21.13 per cent. Acrylic resin generates 34.64 per cent of the total amount of smoke produced during the combustion of intumescent flame retardant coatings. Research limitations/implications – All the other intumescent flame retardant coating systems could be studied using the same approach as that used in this work to achieve an improved understanding of the smoke generation process during combustion. Practical implications – The method developed here provided a simple and practical solution to analyse the decomposition and smoking generation of acrylic resin in the coating mixtures. It also can be used to analyse any thermal decomposition process of any mixed compounds. Originality/value – The analysis method to evaluate resin’s smoking generation of coating’s total generation is novel, and it could be applied in all kinds of coatings and mixtures to estimate the smoking generation of one composition.
7
Li, Xiaoteng, Siyi Luo, Zongliang Zuo, Weiwei Zhang, and Dongdong Ren. "The Pyrolysis Behaviors of Blended Pellets of Pine Wood and Urea-Formaldehyde Resin." Energies 16, no. 4 (February 19, 2023): 2049. http://dx.doi.org/10.3390/en16042049.
Full textAbstract:
TG-FTIR and PY-GC/MS were used to analyze the pyrolysis behaviors of pine wood, urea-formaldehyde resin (UF resin) and their blended pellets. The pyrolysis process was divided into three stages: water evaporation, devolatilization and pyrolysis residue decomposition. During the pyrolysis process of the blended pellets, with the increase of the addition ratio of UF resin, the peak value of the weight loss decreased in the decomposition stage of the pyrolysis residue, while the temperature shifted to the low-temperature region. This was mainly due to the structural stability of pyrolytic carbon produced by UF resin, which hindered the thermal decomposition of lignin-produced residues in pine. FTIR showed that CO2 was the main product of pyrolysis. For UF resin, nitrogen compounds accounted for a large proportion. With the addition of UF resin, the nitrogen in the blended pellets increased significantly. Since the synergistic effect promoted the further decomposition of the organic oxygen-containing structure, the NO release was still increased. PY-GC/MS showed that co-pyrolysis produced more nitrogen-containing compounds and promoted the decomposition of macromolecular phenol derivatives, lipids and ketones, resulting in more small-molecule acids and alcohols.
8
F M, Alshawi, Abdul Razzq K, and Hanoosh W S. "Synthesis and thermal properties of some phenolic resins." Innovaciencia Facultad de Ciencias Exactas Físicas y Naturales 7, no. 1 (October 25, 2019): 1–15. http://dx.doi.org/10.15649/2346075x.508.
Full textAbstract:
Introduction: Phenolic resins have been in use since the early twentieth century and are considered the first class of synthetic polymers to achieve commercial success, moreover phenolic resins continue to succeed and attract special interest in a large range of industrial applications such as adhesives, paints, and composites; because of their unique physical and chemical properties. Materials and Methods: Prepolymers resol resins (RR, RH, RP, and RC) were synthesized by the reaction of phenolic compounds (resorcinol, hydroquinone, phloroglucinol, and catechol) respectively, with formaldehyde at molar ratio phenol/ formaldehyde 1/1.5, using sodium hydroxide as a catalyst. These resins were characterized by FTIR. The curing reaction of these resins was evaluated using differential scanning calorimetry (DSC), while the thermal stability study was evaluated using thermogravimetric analysis (TGA). Results and Discussion:From the results showing that these prepolymers have different curing temperatures and curing energy, while the TGA study showed that the cured resins have decomposition temperature more than 300 ºC, and char residue at 650 ºC more than 60%. Conclusions: These resol resins have different gel times (8-55) min, and viscosities (435-350) mpa.s. The curing temperature of these resin obtained from DSC curves was (120, 129, 105 and 127 °C), while the thermal behavior of the cured resins obtained from TGA curves showed that these cured resin have two decomposition temperatures and the rate of decomposition in the order of RC < RR< .
9
Saido, Katsuhiko, Hiroyuki Taguchi, Yoichi Kodera, Takeshi Kuroki, Jeong-Hun Park, and Seon-Yong Chung. "Low-temperature decomposition of epoxy resin." Macromolecular Research 12, no. 5 (October 2004): 490–92. http://dx.doi.org/10.1007/bf03218432.
Full text
10
Murthy, R. S. Shreedhara, Zsuzsa Horváth, and Ramon M. Barnes. "Poly(dithiocarbamate) chelating resin decomposition procedures." J. Anal. At. Spectrom. 1, no. 4 (1986): 269–72. http://dx.doi.org/10.1039/ja9860100269.
Full textDissertations / Theses on the topic "Resin decomposition"
1
DAL, BIANCO ALESSANDRA. "Modeling and Numerical Simulation of the Behavior of Charring Ablators During Atmospheric Re-Entry." Doctoral thesis, Politecnico di Torino, 2013. http://hdl.handle.net/11583/2541908.
Full textAbstract:
During the atmospheric entry of a blunt body, a bow shock wave is generated on the nose
of the vehicle, originating a zone at the wall where gaseous species are in thermochemical
non-equilibrium. In fact, the large kinetic energy of the flow is converted through
the shock into internal energy causing an increase in temperature, especially close to
the nose. The temperature rise occurring near the stagnation region may excite the
vibrational energy of the gas molecules and may also lead to dissociation and even to
ionization. Thus, a hypersonic flow is frequently a chemically reacting flow. Another
important high-temperature effect is the radiative heating from the flow to the body.
The most important consequence of high temperatures, from a technological point of view, is the resultant high heat transfer rates to the surface. Thus, in order to protect the vehicle's substructure against the
heat loads coming from the boundary layer, it is necessary to provide an accurate design
of the heat shield that has the task to isolate the interior of the space vehicle from the
high temperatures in the shock layer. Therefore, the accurate prediction of the thermal
response of the Thermal Protection System (TPS) is essential to accurately design the
heat shield with the aim of optimizing its thickness and shape.
Thermal protection systems able to endure
very high temperatures are made up of materials called surface ablators, that lose mass when subjected to
high thermal loads. There can be different causes of mass loss such as phase change,
chemical erosion, oxidation and mechanical removal. In general, the mass loss is part of a process called ablation through which the material rejects energy by means of a density variation. Another type of ablative materials are the so called charring or
decomposing ablators that undergo both surface ablation and in-depth decomposition. The surface
ablators are usually metals, graphite or carbon-carbon, while the charring ablators are resin/binder composites.
The main goal of this research has been the development of a computational tool able to accurately simulate the behavior of a non-reusable heat shield during the atmospheric re-entry of a space vehicle. The final tool can study both the behavior of the ablative thermal protection system and its interaction with the boundary layer through a strong coupling with a CFD solver.
The main features that can be considered during the computation are the decomposition of the resin and
the consequent generation of pyrolysis gas inside the pore space, in addition to the ablation phenomenon.
For instance, the pyrolysis effects related to the inner decomposition within a porous charring ablator can
be studied, including in-depth gas flux, porosity and pore pressure. This information can be used
to predict in-depth damage or mechanical removal caused by large pressure gradients
inside the pore spaces.
Our numerical simulation tool is also able to simulate
the recession of the material and different ablation models can be used to evaluate the recession rate at
the wall.
Moreover the ablators (unlike the ceramic tiles) strongly affect the flow field through the ablation phenomenon and the pyrolysis gas injection into the boundary layer. Consequently, the coupling with a Navier-Stokes
code allows us to study the gas/solid interaction at the wall.
2
Hilli, S. (Sari). "Carbon fractions and stocks in organic layers in boreal forest soils—impacts of climatic and nutritional conditions." Doctoral thesis, Oulun yliopisto, 2011. http://urn.fi/urn:isbn:9789514293979.
Full textAbstract:
Abstract The SOM in boreal forests contains non-living heterogeneous components resulting from microbial and chemical transformations of organic debris from plant litter. The major components in the plant biomass all decompose at different rates and therefore, contribute variably to the stable storages of soil C. The aims of the current thesis were 1) to explore how climate, soil fertility and initial litter quality affect the decomposition rate of litter, 2) to study how the different carbon fractions found in the plant litter relate to the quality and quantity of SOM in forest soils, 3) to determine whether the recalcitrant fraction of litter is derived from lignin and other polyphenols or from lipophilic compounds and carbohydrates, and 4) to determine whether the litter originating from different plant growth forms affects SOM formation in a similar way. The study was conducted in six north boreal and six south boreal study sites, half of which were mesic and half were sub-xeric. The overall initial litter quality and decomposition rate of carbon fractions did not differ between the two fertility levels and climate regimes. Litter with high initial water-soluble extractives (WSE) and nitrogen (N) decomposed at a faster rate than litter with lower initial WSE and N concentration irrespective of the soil fertility or climate conditions. Although decomposition rate varies among litter types, decomposition rate cannot explain differences in SOM quality or quantity between the northern and southern boreal forests. The organic matter accumulation and relative proportion of acid-insoluble residue (AIR) in SOM was higher in south boreal sites both in sub-xeric and mesic sites. Detailed characterization of the AIR fraction using pyrolysis-GC demonstrated that in the litter layer the concentration of AIR contains lignin and other insoluble polyphenols, but in the F and H layers, lignin-derived and chemically modified polyphenolics and decomposition products of resin acids. Although the concentration of the AIR fraction varies among litter types, its composition varied very little among the litter types, and between a sub-xeric and a mesic site. The results of this study suggest that the differences in plant community structure and quantitative differences in the litter input by various growth forms has more impact on OM accumulation than decomposition conditions in coniferous soilsTiivistelmä Metsämaan orgaaninen aines koostuu eriasteisesti hajonneesta karikkeesta sekä pitkälle maatuneesta, hajottajien muokkaamasta humuksesta. Tutkimuksessa selvitettiin 1) kuinka ilmasto, maaperän ravinteisuus ja karikkeen kemialliset ominaisuudet vaikuttavat karikkeen hajoamisnopeuteen, 2) kuinka kasvien sisältämät erilaiset hiilifraktiot vaikuttavat maaperän orgaanisen aineen laatuun ja määrään, 3) millaiset hiiliyhdisteet muodostavat vaikeimmin hajoavan hiilifraktion karikkeessa ja pidemmälle maatuneessa orgaanisessa aineessa ja 4) onko erilaisten kasvien vaikutus orgaanisen aineksen muodostumiseen samanlainen kuusikoissa ja männiköissä pohjois- ja eteläboreaalisella havumetsävyöhykkeellä. Tutkimuksessa havaittiin, että karikkeen maatumisnopeudessa ei ollut eroja pohjois- ja eteläboreaalisella kasvuvyöhykkeellä eikä kuusikoiden ja männiköiden väillä. Karike, joka sisälsi runsaasti vesiliukoisia yhdisteitä ja typpeä maatui nopeammin kuin vähän vesiliukoisia yhdisteitä tai typpeä sisältävä karike. Karikkeen maatumisnopeus ei kuitenkaan kyennyt selittämään eroja pidemmälle maatuneen orgaanisen aineksen määrässä ja laadussa pohjois- ja eteläboreaalisella kasvuvyöhykkeellä. Orgaanisen aineksen määrä oli suurempi eteläboreaalisella kasvuvyöhykkeellä verrattuna pohjoisboreaaliseen. Lisäksi vaikeasti hajoavia hiiliyhdisteitä (AIR-fraktio) kertyi eteläboreaaliseen metsämaahan enemmän kuin pohjoiseen. Karikekerroksessa ligniini ja polyfenolit muodostivat suuren osan AIR-fraktiosta. Maatumisen edetessä AIR-fraktion muodostavat lähinnä ligniinin hajoamisesta peräisin olevat ja muut modifioituneet polyfenolit sekä pihkahappojen hajoamistuotteet. Vaikka AIR-fraktion konsentraatio vaihteli kariketyypeittäin, sen kemiallinen koostumus oli hyvin samanlainen karikelajista riippumatta. Tutkimuksen perusteella vallitseva kasvillisuus ja sen tuottaman karikkeen määrä ja laatu vaikuttavat enemmän metsämaahan kertyvän orgaanisen aineen määrään kuin maatumisolosuhteet
3
Bolasodun, Babatunde. "Microwave effects on the curing, structure properties and decomposition of epoxy resins." Thesis, University of Manchester, 2011. https://www.research.manchester.ac.uk/portal/en/theses/microwave-effects-on-the-curing-structure-properties-and-decomposition-of-epoxy-resins(805aec6d-44e5-4a57-8f45-d61486a83bfc).html.
Full textAbstract:
Comparative studies were carried out on the curing kinetics, physical and mechanical properties of conventionally and microwave cured epoxy resins. Epoxy resins Araldite LY 5052 and DLS 772 were used for this study. 4 4' Diaminodiphenyl sulfone was used as a hardener in the preparation of both systems. Nuclear magnetic resonance and gel permeation chromatography were used to identify the chemical structure of the resins. Differential scanning calorimetry was used to monitor the curing kinetics of conventionally cured epoxy samples while a microwave heating calorimeter was used to monitor the curing kinetics of microwave cured epoxy samples 'in situ'. These studies were carried out under non-isothermal and isothermal conditions. For both conditions, there was a significant increase in the fractional conversion of the microwave cured samples compared to the conventionally cured samples. The curing reactions for samples cured using microwave heating took place over a smaller temperature range. Higher reaction rates were observed in the samples cured using microwave heating.There were some differences in the kinetic parameters of the non-isothermal curing reactions of samples cured using microwave and conventional heating. For the Araldite LY 5052 / 4 4' DDS epoxy system, the microwave cured samples had higher activation energy than conventionally cured samples, while for the Araldite DLS 772 / 4 4' DDS epoxy system, the microwave cured samples had lower activation energy. The activation energies of the microwave isothermal curing of both Araldite LY 5052 / 4 4' DDS and Araldite DLS 772 / 4 4'DDS epoxy systems were lower than the activation energies of the conventionally cured samples.Infrared spectroscopy showed that the curing reaction followed the same path during conventional and microwave heating. It also revealed that the reaction rate of the microwave cured samples was higher than the conventionally cured samples.For both epoxy systems, the microwave cured samples had a higher glass transition temperature (Tg) , higher cross-link density (v) and lower molecular weight between cross-links. These showed that the microwave cured samples had a more compact network structure than the conventionally cured samples, which is an indication of better mechanical properties.A microwave reaction system was used to successfully dissolve conventional and microwave cured samples of Araldite DLS 772 / 4 4' DDS epoxy system. The chemical structure of the decomposed product was determined.
4
Lemattre, Alexis. "Développement de résines polyester insaturées ignifugées : caractérisation des performances feu/fumées et détermination des mécanismes de décomposition." Thesis, Mulhouse, 2018. http://www.theses.fr/2018MULH2179.
Full textAbstract:
Depuis des années, les marchés des résines polyester insaturées (UP) et des composites sont en pleine expansion. En effet, grâce à la versatilité de leurs structures chimiques, les résines UP offrent un éventail de propriétés physico-chimiques et mécaniques pour le matériau final. Ces caractéristiques ainsi que leur bon rapport performance / prix expliquent l’engouement des industriels pour leur utilisation dans les composites et « gels coat » dans les domaines du bâtiment et du transport. Cependant, ces résines sont inflammables et présentent donc un risque pour leurs utilisations dans les domaines d’application accueillant des personnes. Les réglementations européennes imposent par conséquent une amélioration des propriétés feu/fumées de ces résines. La norme européenne EN45545-2 entrée en application en 2018 a pour but d’unifier les différentes normes nationales et de diminuer le risque d’incendie dans les transports ferroviaires. Les résines UP halogénées actuellement sur le marché produisent des quantités de fumées opaques et toxiques importantes. Les objectifs de ces travaux ont donc été de synthétiser et/ou d’additiver de nouvelles résines UP non halogénées et fluides possédant une tenue au feu comparable à celle des résines halogénées. La combinaison de résines UP modifiées et de retardateur de flamme (RF) additifs a été étudiée et optimisée. L’utilisation à la fois d’un RF réactif et d’un RF additif possédant un effet de synergie a permis de répondre au cahier de charges défini par le partenaire industriel. Cette résine a permis d’améliorer les performances feu/fumées du matériau composite sans impacter ses propriétés physico-chimiques et mécaniquesFor many years, unsaturated polyester (UP) resins and composites markets are growing. Indeed, the wide range of UP resins gives a large physico-chemical and mechanical properties to composites. These properties and the good performance / price ratio explain the market growth of these resins in industrial applications like composites or gel coats for transportation and construction. However, UP resin exhibit low flammability and the enhancement of their fire behaviour is needed to meet the legislation and to protect goods and people. Since 2018, the European legislation for fire protection used in railway applications (EN45545-2) has strengthened and been harmonized. Smoke opacity and toxicity are the main issue of halogenated unsaturated polyester resins currently used on this market. The aims of this study were thus to develop and formulate new halogen-free and low viscosity UP resins presenting good flame retardant properties. A synergist mixture of reactive and additive flame retardants (FR) was found to be the solution to substitute brominated UP resins and meet the industrial specifications. Finally, the use of such a resin enables developing flame retardant composites without affecting their physico-chemical and mechanical properties
5
Goldblatt, Nicholas Zalmon. "The characterisation of manganese (IV) compounds and the study of the thermal decomposition of potassium chlorate alone and with Mn(IV) and other oxides and salts." Thesis, Brunel University, 1998. http://bura.brunel.ac.uk/handle/2438/5260.
Full textAbstract:
Manganese dioxide compounds are preferred curing agents for Polysulphide resins used as sealants in industry. These are required to have consistent setting characteristics and the investigation was initiated to characterise a number of proffered compounds of this type an to establish criteria by which an informed choice could be made of an optimum curing ages for a specific set of conditions. Several different chemical and physical properties were examined and critical parameters were established. A compound - sodium birnessite- was identified as a significant agent in the determination of curing properties. It was synthesised and its curing properties alone and in combination with other manganese dioxide compounds was evaluated. In an effort to find a specific reaction which might be used to characterise manganese dioxide curing agents it was decided to examine the classical reaction between these compounds and potassium chlorate. A literature search revealed major contradictions in the reported conditions under which potassium chlorate undergoes thermal decomposition as result of which it was decided to study the decomposition of potassium chlorate alone and in the presence of manganese dioxide and other catalysts. During this investigation a hitherto unreported high temperature structural change in potassium chlorate at 341° C was identified. The existence of this reversible change was confirmed by Powder Diffraction X-Ray analysis and an orthorhombic (near tetragonal) more open structure was assigned to it. It is suggested that the rapid decomposition of potassium chlorate in the solid state presence of catalysts is related to this change to a more open structure.
6
Gagliardi, Anna. "A new, environmentally friendly approach towards the synthesis of epoxy functionalized poly-DCPD." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/19196/.
Full textAbstract:
Epoxy resins are thermosetting resins with excellent mechanical properties, high adhesiveness to many substrates, good thermal stability and chemical resistances, high tensile strength and modulus, and ease of handling and processability. Currently epoxy resins are very popular as fiber-reinforced materials, general-purpose adhesives, high-performance coatings, paints and encapsulating materials. During the last decades, demand for material systems with precise control over multiple properties has increased, as well as the necessity to find new sustainable processes for their manufactory. Thanks to a collaboration between the German company Rutgers and professor Raveendran of the University of Amsterdam, the work presented here was focused on a novel, environmentally friendly path for the achievement of epoxy functionalized poly-DCPD. Reaction of epoxidation of DCPD with hydrogen peroxide, catalyzed by various metal oxides, was studied and optimized in view of a future polymerization of the functionalized monomers. Direct epoxidation of poly-DCPD was also attempted.
7
Koreeda, Tamy. "Caracterização termoanalítica e estudo de cura de compósito de resina epóxi e mica com propriedades elétricas isolantes aplicado em máquinas hidrogeradoras." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/46/46133/tde-25042011-112216/.
Full textAbstract:
Atualmente, a participação da energia elétrica na matriz energética mundial é um assunto em evidência. O estudo do compósito isolante da barra estatórica, um dos componentes principais da máquina hidrogeradora, permite a obtenção de informações físico-químicas relevantes ao aperfeiçoamento do sistema, e também de estudos de comportamento térmico quando este é exposto à alta temperatura, por diferentes intervalos de tempo submetidos a estresses mecânicos, elétricos e/ou químicos. O sistema em estudo é o MICALASTIC®, desenvolvido pela empresa Siemens em 1960. Neste trabalho, as propriedades térmicas do compósito isolante, formado por uma fita de mica, resina epóxi (DGEBA), endurecedor (MHHPA) e acelerador naftenato de zinco (N-Zn) foram estudadas. Utilizando-se as técnicas termoanalíticas Calorimetria Exploratória Diferencial (DSC) e Termogravimetria e Termogravimetria Derivada (TG/DTG), o comportamento térmico de cada um dos materiais foi avaliado. As curvas DSC e TG/DTG também evidenciaram as possíveis interações químicas entre os componentes. Os estudos referentes à cura do material e da degradação térmica do compósito curado foram realizados. Observou-se claramente a influência da quantidade de acelerador na polimerização do sistema. A partir das curvas DSC, observou-se dois mecanismos de cura diferentes coexistentes, um com menor quantidade de N-Zn e outro com concentração maior, resultando em eventos de cura com início em temperaturas diferentes. Esse fato ainda não havia sido estudado desde a origem do sistema. Além disso, a perda de massa referente à evaporação do endurecedor no início do processo de cura foi confirmada a partir da caracterização do compósito por espectroscopia de absorção na região do infravermelho, comparando-se os espectros antes e após o fenômeno. Na prática, dois perfis de impregnação, o Homogêneo e o Heterogêneo, de barras condutoras são utilizados, e uma diferença significativa entre eles foi observada. Os estudos desenvolvidos devem ser associados a testes elétricos específicos para o melhor entendimento da relação entre a aplicação do material e suas propriedades teóricas termoanalíticas. Além disso, foi realizado o estudo cinético da decomposição térmica do compósito curado por métodos termogravimétricos, isotérmico e dinâmico.Currently, the electric energy participation in the world energy matrix is a significant issue. The insulating composite in stator bars, which are one of the most important components in hydrogenerator machines, allows the attainment of relevant physical and chemical information to system optimization, in addition to study thermal behavior when the material is exposed to high temperatures, for different time intervals and mechanical, chemical and/or electrical stress. The studied system is MICALASTIC®, developed by Siemens Company in 1960. In this work, thermal properties of this insulating composite, composed by mica tape, epoxy resin (DGEBA), hardener (MHHPA) and zinc naphtenate (N-Zn) as accelerator, were studied. Using thermoananalytical techniques as Differential Scanning Calorimetry (DSC) and Thermogravimetry and Derivative Thermogravimetry (TG/DTG), thermal behavior of each material was evaluated. DSC and TG/DTG curves evidenced chemical interactions between components. The study relative to material curing and cured composite thermal degradation were described. It was clearly observed the N-Zn amount influence in the cure of system, and through DSC curves, it was possible to observe two distinct polymerization coexisting mechanisms, one with lower quantity of N-Zn and another one with bigger concentration, resulting in cure events starting in different temperatures. This fact has not been studied yet since the system has been originated. Besides that, the weight loss related to hardener evaporation starting with curing process was confirmed by composite characterization by FTIR spectra, before and after phenomenon. In practice, two impregnation patterns (Homogeneous and Heterogeneous) of conductive bars are used and a significant difference between them was observed. The developed studies have to be associated to electrical tests to a best understanding about material application and theoretical thermoanalytical properties. In addition, it was performed thermal decomposition of cured composite kinetic study by isothermic and dynamic thermogravimetric methods
8
Jomaa, Ghassan. "Étude des dégagements gazeux survenant pendant la coulée de pièces d’Aluminium." Thesis, Paris, ENMP, 2014. http://www.theses.fr/2014ENMP0068.
Full textAbstract:
La fabrication de pièces automobiles en aluminium des formes complexes telles que les culasses de moteur par le procédé de fonderie est effectuée par l'insertion de noyaux en sable durci par des résines (liants) organiques dans un moule métallique et la coulée d'un métal en fusion dans ce moule. Sous l'effet de la température élevée du métal, les résines organiques se décomposent et produisent des dégagements gazeux qui altèrent la qualité des pièces à fabriquer. Jusque tout récemment, la maîtrise des dégagements gazeux survenant pendant le procédé du moulage était basée sur des essais expérimentaux. L'objet du présent travail est d'étudier les dégagements gazeux par simulation numérique. Pour ce faire, nous avons proposé plusieurs modèles numériques. Nous avons introduit un modèle cinétique pour la décomposition thermique des résines organiques. Nous avons développé un modèle général d'écoulements multiphasiques en milieux poreux en utilisant la méthode de prise de moyenne volumique. Quatre modèles de dégagements gazeux, représentant l'écoulement et le transport de gaz dans le noyau sous différents scénarios, sont donnés à partir du modèle général. Des modèles sont également développés pour décrire le couplage de transferts thermiques dans le moule et la pièce à fabriquer avec les dégagements gazeux dans le noyau. L'implémentation des différents modèles dans le logiciel libre OpenFOAM a permis d'obtenir un outil de simulation capable de simuler les dégagements gazeux sous différents scénarios et d'étudier l'impact de plusieurs facteurs tels que le type des résines, la forme de noyau, la perméabilité de sable sur l'évolution de la pression du gaz dans le noyauThe manufacture of automotive aluminum parts with complex shapes such as cylinder heads of the engine by the casting process is carried out by the insertion of cores made with sand hardened using organic resins (binders) in a metal mold and pouring of molten metal in this mold. As a result of the high temperature of poured metal, organic resins undergo thermal decomposition (pyrolysis) and produce gases which impair the quality of the parts to be manufactured. Until recently, the study of gas emissions occurring during the casting process was based on experimental tests. The purpose of this work is to study the gas emissions by numerical simulation. To do this, we proposed several numerical models. We introduced a kinetic model for the thermal decomposition of organic resins. We have developed a general model of multiphase flow in porous media using the method of volume averaging. Four models of gas emissions representing flow and transport of gas in the core under different scenarios are given from the general model. Models are also developed to describe the coupling of the heat transfer in the mold and the casting with gas emissions in the sand core. The implementation of the various models in the free software OpenFOAM provides a simulation tool that allows to simulate gas emissions under different scenarios and to study the impact of several factors such as the type of resins, core shape, the permeability of the sand on the evolution of the pressure of gas in the core
9
Tzu-HanCheng and 鄭梓涵. "Decomposition and oxidation of synthetic resin-containing wastewater by Electro-Fenton technology." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/31480763664821066945.
Full textAbstract:
碩士國立成功大學
化學工程學系
103
The ion-exchange resin (IER) is commonly used in nuclear power plant to purify the cooling water and remove radioactive elements. Cementation is a conventional process to treat the spent resin in Taiwan. Swelling of resin by ion-exchanging with calcium ions in the concrete destroyed the container after a long-term storage. This work used electro-Fenton to dissolve the IER at an initial temperature of 85℃. Effectiveness of IER oxidative decompostion was then evaluated by varying the IER loading, the pHi of the solution, the flow rate of H2O2, the dosage of H2O2, the electrical current, ferrous ion concentration and ferrous ion type. Experimental results revealed that the pHi (1.0-3.0) did not play a vital role in ultimate IER removal. IER treated by electro-Fenton was eventually optimized with 1.2 ml/min H2O2, 240 ml of 50 % H2O2, 20 mM FeSO4 at constant current 1 A as treating 40 g/L resin. The decomposition of cationic resin is easier than the anionic resin. After adding 3 times, the IERr and TOCr are near 90 %. After oxidative decomposition of resin, electrochemical oxidation with chloride is feasible.
10
Yeh, Rong Zen, and 葉榮仁. "Kinetics of Thermal Decompositions of Epoxy Resin and Styrene- Butadiene Rubber." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/11378692184222789214.
Full textBook chapters on the topic "Resin decomposition"
1
Opoku-Duah, Stephen, Dennis Johnson, Dan Blair, and Jeff Dimick. "Removal of Microcystins from Drinking Water by Electrocoagulation: Upscaling, Challenges, and Prospects." In Cyanobacteria - Recent Advances and New Perspectives [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.105751.
Full textAbstract:
Microcystins (MCs) belong to a family of stable monocyclic heptapeptide compounds responsible for hazardous toxins in drinking water. Although several methods have been applied to remove MCs from drinking water (e.g., activated carbon filtration, ion exchange resins, high-pressure membranes, and electrochemistry), upscaling laboratory experiments to benefit municipal water treatment is still a major challenge. This chapter is a follow-up study designed to test three electrocoagulation (EC) techniques for decomposing MC by UV-ozone purification (laboratory), electrocoagulation (field unit), and coupled UV-ozone-electrocoagulation (municipal treatment). The chemistry and efficiency of the treatments were first examined followed by comparison with activated carbon filtration. Electrocoagulation outperformed activated carbon filtration by nearly 40%. When the laboratory treatments were evaluated at the municipal scale, effectiveness of the technique deteriorated by 10–20% because of UV pulse dissipation, vapor-ion plasma under-functioning, and limitations of polymer fiber filters. We confirmed previously published studies that pollutant coagulation and MC decomposition are affected by physicochemical factors such as radiation pulse density, electrical polarity, pH, and temperature dynamics. The results have relevant applications in wastewater treatment and chemical recycling.
2
Jhanji Dhir, Yamini. "Natural Fibers: The Sustainable Alternatives for Textile and Non-Textile Applications." In Natural Fiber [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.106393.
Full textAbstract:
The increasing environmental concerns and depletion of petroleum resources have increased the importance of natural fibers and have stimulated researchers and industries to use sustainable fibers instead of conventional synthetic fibers. Besides exceptionally brilliant mechanical and physical properties are also attractive aspects of natural fibers enabling the utilization of natural fibers in myriad of textile and non-textile applications such as clothing, and reinforced composite products in various industries such as automotive, building, and furniture. Natural fiber composites are composite materials comprising of reinforcing fibers derived from renewable and carbon dioxide neutral resources such as wood or plants. NFCs find application in molded articles that demand moderate strength for acceptable performance for various indoor and outdoor applications. A rapid drift from oil-derived polymers and mineral-reinforced materials to sustainable alternatives has fostered automotive and packaging industries to start utilizing natural fiber composites in their designs. Accordingly, natural fiber composites are serving as energy efficient and sustainable alternatives replacing traditional materials such as metals, polymeric resins, and reinforcement fibers. A worldwide clamor for green products and thus upsurge in sustainable alternatives have been witnessed as a result of diminishing petroleum reserves worldwide, exorbitant prices of petroleum, and high disposal costs of petroleum-based composites along with inability of decomposition of some petroleum-based composites. Contrastingly, natural materials outshine the petroleum-based products in being renewable, inexpensive, biodegradable, and eco-friendly.
3
Brovko, Oleksandr O., Natalia V. Yarova, Tetiana F. Samoilenko, and Larysa M. Yashchenko. "Mutual sensibilization in epoxyacrylate interpenetrating polymer networks." In NEW FUNCTIONAL SUBSTANCES AND MATERIALS FOR CHEMICAL ENGINEERING, 149–58. PH “Akademperiodyka”, 2021. http://dx.doi.org/10.15407/akademperiodyka.444.149.
Full textAbstract:
Using the method of IR spectroscopy, the kinetic features of the course of photoinitiated cationic and free radical polymerization in simultaneous epoxyacrylate interpenetrating polymer networks were investigated. The degree and rate of conversion of epoxy groups in the epoxy component (aliphatic diepoxide UP-650D, aliphatic-alicyclic triepoxide UP-650T, and diane epoxides ED-20 and Epicot 828), and the opening of double bonds in acrylate component (triethylene glycol dimethacrylate) were determined. The sensitizing effect of the acrylate component on the degree of conversion of epoxy groups in IPNs with aliphatic diepoxide or aliphatic-alicyclic triepoxide with an epoxy/acrylate ratio of 50/50 wt. % was revealed. For diane epoxies, the opposite regularity of conversion of epoxy groups in the composition of epoxy-acrylate IPNs is observed: in comparison with initial polymer networks, the degree of conversion of epoxy groups was significantly reduced. In the first case of low-viscosity aliphatic and cycloaliphatic epoxides such a sensitization is occurred due to the fact that the simultaneous polymerization of acrylate via a free radical mechanism promotes the decomposition of the photoinitiator and the formation of more macrocations quantity. In second case of more viscous diane epoxy resins, the spatial restriction imposed by the rapidly formed acrylate networks is predominate. That is why the conversion of epoxy groups is reduced and this effect is neutralized.
4
Keefer, Robert F. "Soil Organic Matter." In Handbook of Soils for Landscape Architects. Oxford University Press, 1999. http://dx.doi.org/10.1093/oso/9780195121025.003.0018.
Full textAbstract:
Soil organic matter (SOM) is probably the most important constituent of soils. The effect of SOM on soil properties far exceeds the relative percentage of this material in soils. The small amount of organic matter in soils, usually from 1 to 5%, is very important in providing a reserve food source for microorganisms and higher plants. Almost all properties of SOM are beneficial for plant growth. Soil organic matter can be defined as a complex, heterogeneous mixture of plant and animal remains in various stages of decay, microbial cells—both living and dead—microbially synthesized compounds, and derivatives of all of the above through microbial activity. Soil organic matter is probably the most complex of all naturally occurring substances. Some compounds in SOM are distinctive to soil and are not present in plants or animals. By examining the composition of SOM, one can see why it is such a complex material. The following compounds have been isolated from chemical SOM extracts: . . . 1. Carbohydrates (sugars, polysaccharides)—about 75% of dry weight 2. Lignin (a plant polymer of phenyl propane units) 3. Proteins (combinations of amino acids) 4. Hydrocarbons—fats, waxes, resins, and oils 5. Tannins (phenolic substances) 6. Pigments (chlorophyll) 7. Organic acids (many in the biochemical Krebs cycle) 8. Miscellaneous compounds—includes organic P, organic S, polynuclear hydrocarbons, nucleic acid derivatives, alcohols, aldehydes, esters, etc. . . . Whenever organic materials are added to a soil the physical properties of soil structure, water-holding capacity, and soil color are changed. The extent of change in these properties depends on the amount and type of organic material added, the soil microorganisms present in the soil, and the speed at which decomposition occurs. Aggregation and granulation (crumb formation) is increased by polysaccharides produced by microorganisms during decomposition. This improves soil tilth (ability to work the soil) and helps stabilize the soil crumbs. The ability of a soil to hold water is greatly increased by addition of SOM. This results in greater infiltration (water moving into the soil) and adsorption of water by the SOM, with consequently less erosion and loss of soil particles and fertility.
Conference papers on the topic "Resin decomposition"
1
Zhou, Yan, and Haifeng Zhang. "Design and Research of Spent Resin Conical Dryer Device." In 2017 25th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/icone25-66008.
Full textAbstract:
This paper introduced the design and research of spent resin conical dryer which was based on the analysis of the thermal decomposition characteristics of resins. The drying experiment of non-radioactive cation exchange resins and anion exchange resins was also carried out in this study. The result showed that the water content of resins reduced from about 55%(wt) to 8.5%(wt) and the volume reduction ration reached 2.17 with a drying end temperature of 90°C, which preliminarily verified the feasibility of the vacuum drying process and conical dryer device for treating radioactive spent resins.
2
Liu, Yuyan, Xianyun Gong, Songquan Wu, and Lan Li. "Decomposition of Epoxy Resin E-44/METHPA by Tetrahydronaphthalene." In 2012 International Conference on Biomedical Engineering and Biotechnology (iCBEB). IEEE, 2012. http://dx.doi.org/10.1109/icbeb.2012.124.
Full text
3
Yamamoto, Atsunori, Ryuji Yamakita, Yojiro Ishino, and Norio Ohiwa. "Microscopic Approaches to Decomposition and Burning Processes of a Micro Plastic Resin Particle." In ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference collocated with the ASME 2007 InterPACK Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/ht2007-32169.
Full textAbstract:
From a fundamental and microscopic viewpoint to elucidate the possibility and availability of thermal recycling of wasted plastic resin, a series of heating processes of melting, thermal decomposition and burning of a spherical micro plastic resin particle having a diameter of about 200 μm are observed, when it is suddenly exposed to hot oxidizing combustion gas. Three ingenious devices are introduced; the first is a high-speed microscopic direct and schlieren system, the second is a pre-mixed mini-burner for abrupt heating, which is equipped with a pair of spark gaps at its exit and is discharged synchronously with the starting signal of high-speed camera, and the third is a single mini-puff generator, which enables to extinguish instantly all flames around the micro particle at an arbitrary assigned time after the spark ignition. Polyethylene terephthalate and polyethylene are used as two typical plastic resins. In this paper the dependency of internal and external appearances of residual plastic embers on the heating time and the initial plastic composition is optically analyzed, along with appearances of internal micro bubbling, micro jets and micro diffusion flames during abrupt heating. Based on temporal variations of the surface area of a micro plastic particle, the burning rate constant is also evaluated and compared with well-known volatile liquid fuels.
4
Katagiri, Gen-ichi, Morio Fujisawa, Kazuya Sano, and Norikazu Higashiura. "Study of LPOP Residue on Resin Mineralization and Solidification." In ASME 2010 13th International Conference on Environmental Remediation and Radioactive Waste Management. ASMEDC, 2010. http://dx.doi.org/10.1115/icem2010-40112.
Full textAbstract:
Fuji Electric had developed the low pressure oxygen plasma technology for mild decomposition and mineralization of an organic material such as ion exchange resin. This method is suitable for radioactive spent resin volume/weight reduction and stabilization for final disposal. On this process, the ion-exchange resins are vaporized and decomposed into gas-phase with pyrolysis, and then, they are decomposed and oxidized with low-pressure plasma activity based on oxygen. And this process is achieved under moderate condition for radio active waste. • incinerate temperature: 400–700 deg C; • low-pressure (low-temperature) plasma condition: 10–50 Pa. From the result of this process, named of LPOP(low pressure oxidation process) by the inductively coupled plasma, we have confirmed that the process is applicable for organic fireproof waste including ion-exchange resin, and found that the used resin treatment performance is the same as cold test (using imitate spent resin) [1] [2] [3]. In this paper, the outline of the LPOP technology, and two research results on the possibility of solidification with cement of LPOP residue for geological disposes are reported. (1)Study of the residue chemical form after LPOP process (2)Study of the solidification character with cement.
5
Wagle, Vikrant, Jothibasu Ramasamy, Khawlah Alanqari, and Abdullah AlYami. "Expandable Resin for Countering Severe Loss Circulation." In Middle East Oil, Gas and Geosciences Show. SPE, 2023. http://dx.doi.org/10.2118/213754-ms.
Full textAbstract:
Abstract One of the main reasons why loss circulation is difficult to remedy is the lack of knowledge about accurate fracture width and depth encountered while drilling, leading to an improper selection of suitable plugging materials that can adapt, in both volume and shape, to effectively plug a wide range of fractures with unknown dimensions. Traditional, non-reactive particulate/fiber based or settable fluid, types of loss circulation materials (LCM), when applied in insufficient quantities, cannot effectively seal a high permeability zone. The LCM described in this paper is however expandable in nature. This expandable nature of the resin can help the LCM adapt in volume to effectively seal a wide range of fractures with unknown dimensions. Volume adaptability is introduced in the LCM through in-situ generation of gas due to the decomposition of a gas generating compound. The novel expandable LCM comprises of a resinous material, a gas producing agent, surfactant and an activator. The resinous material in presence of a gas producing agent, surfactant and an activator is designed to expand under downhole conditions and help to cure severe losses. Different LCM compositions comprising varying concentrations of resin material, a gas producing agent, surfactant and an activator have been described in the paper. Two different resins were used in the study. The resins were mixed in different ratios and the impact on gelling time was investigated. An aliphatic chemical activator was used in the study. The effect of this activator on the gelation properties of the resin was investigated. The effect of temperature on the expansion of the resin in the presence of gas producing agent was also investigated. The expandable LCM starts to generate gas in-situ under wellbore conditions. Laboratory testing has been performed to quantify the % of expansion of the resin at different temperatures. It was observed that the rate of gas generation is faster at higher temperatures. The expandable LCM is designed so as to have a controllable gelation time under a variety of downhole conditions to allow accurate placement of the LCM inside the wellbore without premature setting of the fluid. It was shown that the gelation time of the treatment composition could be controlled by adjusting the concentration of the activator. The system is designed so as to give a predictable and controllable pumping time, ranging from a few minutes to several hours at over a wide range of temperatures.
6
Saberi Movahed, Farshad, Gary Cheng, Balaji Shankar Venkatachari, and Ioana Cozmuta. "Atomistic simulation of thermal decomposition of crosslinked and non-crosslinked phenolic resin chains." In 42nd AIAA Thermophysics Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2011. http://dx.doi.org/10.2514/6.2011-3786.
Full text
7
Alanqari, Khawlah, Abdullah Al-Yami, and Vikrant Wagle. "Synthesis of Epoxy Resin Based Geopolymer Utilizing Saudi Arabian Volcanic Ash for Primary Well Cementing Applications." In ADIPEC. SPE, 2022. http://dx.doi.org/10.2118/211765-ms.
Full textAbstract:
Abstract Conventional cement production possess huge environmental concerns. Which is considered globally the third largest source of CO2 emissions into the environment. This is due to the decomposition of carbonates that produce around 900 kg of CO2 for every 1000 kg of cement production. As a substituent, geopolymer cement can reduce the CO2 emissions by 80% because there is zero CO2 emissions through the geopolymer cement production. Moreover, Geopolymer cement can be prepared utilizing waste materials such as fly ash. In Saudi Arabia, we have enough volcanic ash to sustain the development of this eco-friendly cement. Furthermore, geopolymer binders show an exceptional mechanical, chemical and environmental benefits in comparison to conventional cement. In addition to geopolymer properties, liquid epoxy resins are known to increase bonding with casing; thus, increasing the wellbore integrity. In this study, we successfully developed a novel epoxy resin based geopolymer cement utilizing a Saudi Arabian volcanic ash for primary cementing applications for the oil and gas industry. This was done by adding an epoxy resin formulation to the geopolymer slurry. This novel cement shows an excellent strength and good rheological properties with a controlled setting time. The objective of this paper is to detail and explain the synthesis of this cement, geopolymer slurry preparation and epoxy resin formulation. Also, to investigate the effect of adding the epoxy resin formulation to the geopolymer slurry in terms of the final cement strength, thickening time and rheological properties as well as to detail lab testing. To prepare the epoxy resin based geopolymer, the volcanic ash particles were activated first by a mixture of NaOH, sodium silicate and water. Then, an epoxy resin formulation was added to the geopolymer slurry that contains an epoxy resin along with a curing agent. The amount of the epoxy resin formulation was varied in order to study the effect of adding the epoxy resin into the geopolymer slurry in terms of the final cement's setting time and compressive strength. This was done to develop a cement with excellent strength and controlled setting to assure a right cement placement. In addition, the chemical conditions were evaluated to simulate a variety of downhole conditions to prove the effectiveness of this novel geopolymer composition as a cement for primary cementing applications. The lab testing includes gelling time and compressive strength measurements as well as a chemical analysis of the Saudi Arabian volcanic ash.
8
Tang, Ya-Wen, Ching-Chau Su, Cheng-Chi Tai, and Jiann-Fuh Chen. "Cast-resin dry-type transformer partial discharge signal analysis using spectral correlated empirical mode decomposition method." In 2013 IEEE International Instrumentation and Measurement Technology Conference (I2MTC). IEEE, 2013. http://dx.doi.org/10.1109/i2mtc.2013.6555472.
Full text
9
Luo, Changsong, and Paul E. DesJardin. "Thermo-Mechanical Damage Modeling for a Glass-Fiber Phenolic-Resin Composite Material." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-81719.
Full textAbstract:
The objective of this research is the development of a thermo-mechanical damage model for composite materials subject to high temperature thermal and radiative environments that are representative of large scale fires. The damage to the structure is expressed as two regions of non-charred and charred material. In the char region, the pyrolysis process of resin is complete and there are only fiber, char and gas. Homogenization methods are imposed to treat the damaged material in terms of the volume fractions associated with composite fiber, resin and char. A transport equation for the phase averaged temperature is presented using a Darcy law to account for the gas transport in the structure. Mechanical response in the composite is taken into account by solving a homogenized form of the linear elasticity equations. Required transport properties for temperature and displacement equations are based on mixture weighted properties of the fiber, gas, resin and char and are dependent on the local volume fraction of each. Numerical simulations of a two-dimensional composite clamped beam subject to radiation heat loading are presented. Overall, good agreement is obtained between the numerical predictions and experimental data for temperature and gas pressure with comparisons to the thermal experimental data of Henderson and Florio [8,9]. Results show that during early stages of heating, the decomposition of the resin results in local stress concentrations due to the increase in temperature and pressure.
10
Qi, Guodong, Zhongjie Wu, Qiubo Qi, Yanan Hao, Meng Xiao, and Xiaoman Feng. "Study on the Compatibility of Perfluorocarbonone and Its Decomposition Products with Epoxy Resin Based on Reactive Force Field Method." In 2020 IEEE International Conference on High Voltage Engineering and Application (ICHVE). IEEE, 2020. http://dx.doi.org/10.1109/ichve49031.2020.9280071.
Full textReports on the topic "Resin decomposition"
1
Hunley, Riley D., and Stewart L. Voit. Decomposition Analysis of Neodymium Loaded Resin. Office of Scientific and Technical Information (OSTI), September 2013. http://dx.doi.org/10.2172/1095157.
Full text
2
Voit, Stewart L., and Claudia J. Rawn. Decomposition of Rare Earth Loaded Resin Particles. Office of Scientific and Technical Information (OSTI), September 2010. http://dx.doi.org/10.2172/990701.
Full text