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Relevant bibliographies by topics / Epoxy resins Physiological effect

Academic literature on the topic 'Epoxy resins Physiological effect'

Author: Grafiati

Published: 10 December 2022

Last updated: 29 January 2023

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Journal articles on the topic "Epoxy resins Physiological effect"

1

Ballal, Nidambur Vasudev, Amal Roy, and Matthias Zehnder. "Effect of Sodium Hypochlorite Concentration in Continuous Chelation on Dislodgement Resistance of an Epoxy Resin and Hydraulic Calcium Silicate Sealer." Polymers 13, no. 20 (October 11, 2021): 3482. http://dx.doi.org/10.3390/polym13203482.

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The conditioning of the root canal wall during chemo-mechanical root canal treatment differentially affects the adhesion of root canal sealers. This investigation evaluated the impact of sodium hypochlorite (NaOCl) concentration as used in a root canal irrigation concept called continuous chelation, with 1-hydroxyethylidene-1,1-diphosphonic acid (HEDP) contained in the NaOCl solution that is applied. Fourier-transform infrared spectra of the dentinal wall were gathered. The consequential effects on push-out bond strength of an epoxy resin (AH Plus) versus a hydraulic CaSi sealer (BioRoot RCS) were assessed. Single-rooted extracted human teeth were used and irrigated with pure NaOCl at a concentration of 0% (physiological saline), 2.5%, or 5.25%. Dual Rinse HEDP (9%) was added to the solutions, or not added for further control. Pure NaOCl solutions caused a decrease in the amide III: phosphate ratios, which was counter-acted by the addition of HEDP. It was observed that the adhesion of the epoxy resin sealer under investigation was negatively affected by this NaOCl deproteinization of the canal wall in a dose-dependent manner, while the opposite was observed with the CaSi sealer. HEDP when used in conjunction with NaOCl was beneficial for the adhesion of both sealers.

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D'Angelo, Stefania, Marika Scafuro, and Rosaria Meccariello. "BPA and Nutraceuticals, Simultaneous Effects on Endocrine Functions." Endocrine, Metabolic & Immune Disorders - Drug Targets 19, no. 5 (June 3, 2019): 594–604. http://dx.doi.org/10.2174/1871530319666190101120119.

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Background: Bisphenol A (BPA) is worldwide diffused as a monomer of epoxy resins and polycarbonate plastics and has recognized activity as Endocrine Disruptor (ED). It is capable to interfere or compete with endogenous hormones in many physiological activities thus having adverse outcomes on health. Diet highly affects health status and in addition to macronutrients, provides a large number of substances with recognized pro-heath activity, and thus called nutraceuticals. Objective: This mini-review aims at summarizing the possible opposite and simultaneous effects of BPA and nutraceuticals on endocrine functions. The possibility that diet may represent the first instrument to preserve health status against BPA damages has been discussed. Methods: The screening of recent literature in the field has been carried out. Results: The therapeutic and anti-oxidant properties of many nutraceuticals may reverse the adverse health effects of BPA. Conclusion: In vitro and in vivo studies provided evidence that nutraceuticals can preserve the health. Thus, the use of nutraceuticals can be considered a support for clinical treatment. In conclusion, dietary remediation may represent a successful therapeutic approach to maintain and preserve health against BPA damage.

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Duan, Chen, and Duan. "Transcriptional Analysis of Chlorella Pyrenoidosa Exposed to Bisphenol A." International Journal of Environmental Research and Public Health 16, no. 8 (April 16, 2019): 1374. http://dx.doi.org/10.3390/ijerph16081374.

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Bisphenol A (BPA) is the raw material of 71% of polycarbonate-based resins and 27% of epoxy-based resins which are used for coating metal-based food and beverage cans. Meanwhile, it is taken into account as a typical environmental pollutant. Hormesis may occur in algae exposed to BPA. In this study, the effects of BPA on Chlorella pyrenoidosa were assessed based on growth inhibition and transcriptome analysis. We have focused on two exposure scenarios as follows: (1) exposure to a low stimulation concentration (0.1 mg.L−1, 19.35% promotion in cell density on the 3rd day); (2) exposure to a high inhibition concentration (10 mg.L−1, 64.71% inhibition in cell density on the 3rd day). Transcriptome analysis showed enrichment in nucleotide transport, single-organism transport, cellular respiration. Among them, adenosine triphosphate (ATP) synthase and Nicotinamide adenine dinucleotide (NADH) dehydrogenase were upregulated under 0.1 mg.L−1 BPA treatment. These changes enhanced the physiological and energy metabolic pathways of C. pyrenoidosa, thereby stimulating cell proliferation. At exposure to the high BPA, severe inhibited changes in the expression levels of several pathways were observed, which were related to tricarboxylic acid (TCA) cycle, glycolysis, fatty acid metabolism, oxidative phosphorylation, and photosynthesis. Therefore, BPA could negatively affect growth inhibition through the multiple energy metabolism processes. These results may result in a deeper insight into BPA-induced biphasic responses in algae, and provide vital information to assess the potential ecological risks of exposure to BPA in an aquatic ecosystem.

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Posnack, Nikki Gillum, Daina Brooks, Akhil Chandra, Rafael Jaimes, Narine Sarvazyan, and Matthew Kay. "Physiological response of cardiac tissue to bisphenol a: alterations in ventricular pressure and contractility." American Journal of Physiology-Heart and Circulatory Physiology 309, no. 2 (July 15, 2015): H267—H275. http://dx.doi.org/10.1152/ajpheart.00272.2015.

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Biomonitoring studies have indicated that humans are routinely exposed to bisphenol A (BPA), a chemical that is commonly used in the production of polycarbonate plastics and epoxy resins. Epidemiological studies have shown that BPA exposure in humans is associated with cardiovascular disease; however, the direct effects of BPA on cardiac physiology are largely unknown. Previously, we have shown that BPA exposure slows atrioventricular electrical conduction, decreases epicardial conduction velocity, and prolongs action potential duration in excised rat hearts. In the present study, we tested if BPA exposure also adversely affects cardiac contractile performance. We examined the impact of BPA exposure level, sex, and pacing rate on cardiac contractile function in excised rat hearts. Hearts were retrogradely perfused at constant pressure and exposed to 10−9-10−4 M BPA. Left ventricular developed pressure and contractility were measured during sinus rhythm and during pacing (5, 6.5, and 9 Hz). Ca2+ transients were imaged from whole hearts and from neonatal rat cardiomyocyte layers. During sinus rhythm in female hearts, BPA exposure decreased left ventricular developed pressure and inotropy in a dose-dependent manner. The reduced contractile performance was exacerbated at higher pacing rates. BPA-induced effects on contractile performance were also observed in male hearts, albeit to a lesser extent. Exposure to BPA altered Ca2+ handling within whole hearts (reduced diastolic and systolic Ca2+ transient potentiation) and neonatal cardiomyocytes (reduced Ca2+ transient amplitude and prolonged Ca2+ transient release time). In conclusion, BPA exposure significantly impaired cardiac performance in a dose-dependent manner, having a major negative impact upon electrical conduction, intracellular Ca2+ handing, and ventricular contractility.

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Riesbeck, Sarah, Hannes Petruschke, Ulrike Rolle-Kampczyk, Christian Schori, Christian H. Ahrens, Christian Eberlein, Hermann J. Heipieper, Martin von Bergen, and Nico Jehmlich. "Adaptation and Resistance: How Bacteroides thetaiotaomicron Copes with the Bisphenol A Substitute Bisphenol F." Microorganisms 10, no. 8 (August 9, 2022): 1610. http://dx.doi.org/10.3390/microorganisms10081610.

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Bisphenols are used in the process of polymerization of polycarbonate plastics and epoxy resins. Bisphenols can easily migrate out of plastic products and enter the gastrointestinal system. By increasing colonic inflammation in mice, disrupting the intestinal bacterial community structure and altering the microbial membrane transport system in zebrafish, bisphenols seem to interfere with the gut microbiome. The highly abundant human commensal bacterium Bacteroides thetaiotaomicron was exposed to bisphenols (Bisphenol A (BPA), Bisphenol F (BPF), Bisphenol S (BPS)), to examine the mode of action, in particular of BPF. All chemicals caused a concentration-dependent growth inhibition and the half-maximal effective concentration (EC50) corresponded to their individual logP values, a measure of their hydrophobicity. B. thetaiotaomicron exposed to BPF decreased membrane fluidity with increasing BPF concentrations. Physiological changes including an increase of acetate concentrations were observed. On the proteome level, a higher abundance of several ATP synthase subunits and multidrug efflux pumps suggested an increased energy demand for adaptive mechanisms after BPF exposure. Defense mechanisms were also implicated by a pathway analysis that identified a higher abundance of members of resistance pathways/strategies to cope with xenobiotics (i.e., antibiotics). Here, we present further insights into the mode of action of bisphenols in a human commensal gut bacterium regarding growth inhibition, and the physiological and functional state of the cell. These results, combined with microbiota-directed effects, could lead to a better understanding of host health disturbances and disease development based on xenobiotic uptake.

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Hoque, Emdadul, Khaled Mahmud Sujan, Md Suman Mia, Md Iqramul Haque, Afrina Mustari, Mohammad Alam Miah, and Md Kamrul Islam. "Effects of bisphenol-A (BPA) on body weight, hematological parameters and histo-texture of kidney in swiss albino mice." Asian Journal of Medical and Biological Research 6, no. 4 (January 7, 2021): 635–40. http://dx.doi.org/10.3329/ajmbr.v6i4.51229.

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Bisphenol-A (BPA) is one of the highest volume chemicals produced world-wide and used in the manufacture of plastics and epoxy resins that are pervasive in our environment and daily lives. The present research was carried out to investigate the effects of two different doses of Bisphenol-A (BPA) on the body weight, hematological parameters and patho-physiological changes of kidney in mice. For this study, fifteen mice, 6 to 8 weeks of age with an average bwt 27.10±0.5 gm, were randomly divided into three groups (n= 5). Group A (control) received only normal mouse pellet while group B and group C received pellet mixed with BPA @ 50 mg and 100 mg / kg bwt daily for 12 weeks, respectively. At the end of the experiment, blood and tissues were collected and processed for hematological and histopathological examination. Results showed that BPA- treated mice caused significant elevation (p<0.01) in weight gain even treated with low dose (50mg) of BPA. The mice exposed to high dose of BPA (100 mg) showed marked reduction (p<0.05) in total erythrocyte count (TEC), significant decreased (p<0.01) in hemoglobin concentration (Hb) and packed cell volume (PCV). Histopathological alterations were detected in the kidneys of BPA-treated mice. In conclusion, this study suggested that BPA exerts deleterious impacts on hematological parameters including association with renal injuries. Asian J. Med. Biol. Res. December 2020, 6(4): 635-640

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Ballal, Nidambur Vasudev, Anja Ivica, Pamela Meneses, Raj Kumar Narkedamalli, Thomas Attin, and Matthias Zehnder. "Influence of 1-Hydroxyethylidene-1,1-Diphosphonic Acid on the Soft Tissue-Dissolving and Gelatinolytic Effect of Ultrasonically Activated Sodium Hypochlorite in Simulated Endodontic Environments." Materials 14, no. 10 (May 13, 2021): 2531. http://dx.doi.org/10.3390/ma14102531.

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The addition of Dual Rinse HEDP, an etidronate powder, to a sodium hypochlorite (NaOCl) solution can create a combined single endodontic irrigant with a soft tissue-dissolving and a decalcifying effect, which can replace traditional alternating irrigation with chemically non-compatible solutions. While the short-term compatibility between NaOCl and 1-hydroxyethylidene-1,1-diphosphonic acid (HEDP) has been shown, it remains unclear whether ultrasonic activation of a combined NaOCl & HEDP solution immediately reduces the available chlorine and/or renders the NaOCl ineffective in dissolving organic tissue remnants. This was tested in three experiments: (1) direct activation in test tubes in an ultrasonic bath and then the activation by an ultrasonically oscillating tip (IrriSafe) in (2) an epoxy resin model containing a simulated isthmus filled with gelatin, and (3) extracted teeth with simulated resorption cavities filled with soft tissue. The control solutions were physiological saline and 2.5% NaOCl without HEDP. In (1), available chlorine after 30 s of ultrasonic activation (37 kHz) of test and control solution was assessed, as well as shrimp tissue weight loss in direct exposure. In (2) and (3), the ultrasonic tip was driven at 1/3 of full power using the respective unit, and areas of removed gelatin from the isthmus and tissue weight loss were used as the outcomes, respectively. Experiment (1) revealed no negative impact by HEDP on available chlorine (1), while all three experiments showed a highly significant (p > 0.001) synergistic effect, which was not hampered by HEDP, between NaOCl and ultrasonic activation regarding tissue weight loss (1, 3) and dissolution of gelatin (2).

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Vyhnánková, Michaela, Jakub Hodul, and Jiří Bydžovský. "Issue of Epoxy-Based Coatings System Crystallization and Effect of Partial Crystallinity on Mechanical Parameters." Key Engineering Materials 776 (August 2018): 147–52. http://dx.doi.org/10.4028/www.scientific.net/kem.776.147.

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Crystallization of bisphenol A-based and bisphenol F-based epoxy resins is the common property of the oligomers. However, producers of paints, coatings and other systems based on these epoxy resins are making efforts to slow down the crystallization process as much as possible. Thereby the shelf life is prolonged, while improving the competitiveness of their products. The main topic is the generalization of factors influencing the crystallization process of bisphenol A-based and bisphenol F-based epoxy resins, the validation of new approaches to possibility of influencing their crystallization process, and the determination of possibility of using a certain degree of crystallinity of bisphenol A-based and bisphenol F-based epoxy resins when preparing and producing paint and coating systems. Two types of the epoxy resins in formulations of paint and coating and other systems, namely: diglycidyl ether of bisphenol A (DGEBA) and diglycidyl ether of bisphenol F (DGEBF) were used. The tendency to crystallize not only for the pure epoxy resins, but also various mixtures with reactive diluents, fillers, etc. was determined according to the standard ISO 4895 Plastics – Liquid epoxy resins – Determination of tendency to crystallize. Furthermore, the crystallinity of individual samples was determined. The effectiveness of potentially active nucleating agents such as precipitated calcium carbonate, DGEBA, and DGEBF crystals, etc. was selected and tested according to the ISO 4895 standard. The effectiveness of potentially active admixtures with crystallization retardation effect was selected and tested according to the ISO 4895 standard. Selected samples of the epoxy resins with a specified degree of crystallinity were cured with 3-aminomethyl-3,5,5-trimethylcyclohexylamine (IPD) based crosslinking agent. Mechanical parameters such as compressive strength and flexural strength were determined. The influence of crystallinity on selected mechanical parameters was also observed.

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Zarybnicka, Lucie, Jana Machotova, Radka Kopecka, Radek Sevcik, Martina Hudakova, Jaroslav Pokorny, and Jiri Sal. "Effect of Cyclotriphosphazene-Based Curing Agents on the Flame Resistance of Epoxy Resins." Polymers 13, no. 1 (December 22, 2020): 8. http://dx.doi.org/10.3390/polym13010008.

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Epoxy resins are characterized by excellent properties such as chemical resistance, shape stability, hardness and heat resistance, but they present low flame resistance. In this work, the synthesized derivatives, namely hexacyclohexylamino-cyclotriphosphazene (HCACTP) and novel diaminotetracyclohexylamino-cyclotriphosphazene (DTCATP), were applied as curing agents for halogen-free flame retarding epoxy materials. The thermal properties and combustion behavior of the cured epoxy resins were investigated. The obtained results revealed that the application of both derivatives significantly increased flame resistance. The epoxy resins cured with HCACTP and DTCATP exhibited lower total heat release together with lower total smoke production compared to the epoxy materials based on conventional curing agents (dipropylenetriamine and ethylenediamine). Comparing both derivatives, the HCACTP-cured epoxy resin was found to provide a higher flame resistance. The designed novel class of epoxy materials may be used for the preparation of materials with improved flame resistance properties in terms of flame spreading and smoke inhibition.

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Monnerie, L., J. L. Halary, and F. Lauprêtre. "Effect of local dynamics on model epoxy resins." Macromolecular Symposia 98, no. 1 (July 1995): 983. http://dx.doi.org/10.1002/masy.19950980188.

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Dissertations / Theses on the topic "Epoxy resins Physiological effect"

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Keung, Lok Hang. "Experimental investigation of size effect in nanoindentation on epoxy /." View abstract or full-text, 2006. http://library.ust.hk/cgi/db/thesis.pl?MECH%202006%20KEUNG.

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Gedeon, Sa'ad S. "The effect of gamma irradiation on the electrical properties of the epoxy resins." Thesis, University of Strathclyde, 1988. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=21487.

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This thesis is concerned primarily with the curing of epoxy resin and the effect of gamma-irradiation on the electrical properties of epoxy resin systems. The particular systems examined were a diglycidyl ether of bisphenol A (DGEBA, Ciba Geigy MY750) epoxy resin cured using one of two hardeners. These were a hydroxyalkylated polyamine (Ciba Geigy HY956) and a dodecenyl-succinicanhydride (DDSA) with an accelerator of benzyldimethylamine. Different methods of examining the curing of the epoxy resin system have been carried out including differential scanning calorimetry (DSC), infrared spectroscopy (I.R.), dielectric measurements, volume resistivity measurements and thermally stimulated discharge current. The results of dielectric relaxation measurements obtained during the curing of the epoxy resin system were interpreted on the basis of a model considering the growing polymer molecules to be in solution, the solvent being the unreacted monomer and hardener. The investigation of the effect of gammairradiation on the electrical properties (conduction mechanism and dielectric behaviour) of the epoxy resin system was achieved by examining the electrical properties of the fully cured epoxy resin system before and after irradiation and the results compared. To establish the electrical properties of the fully cured epoxy resin system before and after irradiation, a series of experiments which provide information about the conduction mechanism, the dielectric properties, the infrared spectra (I.R.) and the glass transition temperature (Tg) obtained from (DSC) measurements were carried out. For the epoxy resin system MY750/HYS56, it was found that the D.C. conductivity, dissipation factor and capacitance values increase, whereas the glass transition temperature (Tg) and the activation energy, E, obtained from D.C. measurements decreased for the irradiated samples. Furthermore, a modification in the I.R. spectrum in the 1600 to 1800 cm⁻¹ range due to the formation of carbonyl groups (C = O) in the irradiated sample has been observed. However in the case of epoxy resin system MY750/DDSA, it was found that the dissipation factor and capacitance values decrease, whilst the glass transition temperature (Tg) and the activation energy obtained from dielectric measurements increased for the irradiated samples.

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El-Sa'ad, L. "The reverse thermal effect in epoxy resins and moisture absorption in semi-interpenetrating polymer networks." Thesis, University of Salford, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.234599.

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Rudd, H. J. "The effect of hygrothermal history on the sorption and diffusion of water in epoxy resins." Thesis, Imperial College London, 1987. http://hdl.handle.net/10044/1/46394.

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Lakshminarayanan, Priya V. "EFFECT OF NITRIC ACID OXIDATION ON VAPOR GROWN CARBON FIBERS (VGCFs). USE OF THESE FIBERS IN EPOXY COMPOSITES." MSSTATE, 2003. http://sun.library.msstate.edu/ETD-db/theses/available/etd-08012003-153407/.

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Pyrograf III^{TM,/sup> fibers (PR-19-PS, Applied Sciences, Inc.) with 100-300 nm diameters and ~ 10-100 ìm lengths were used with a low viscosity aliphatic epoxy resin (Clearstream 9000, Clearstream Products, Inc.) to produce composites. The VGCFs were oxidized in 69-71 wt% nitric acid (115°C) for various times (10 min to 24 h) to modify the surface to enhance fiber/matrix adhesion. Remarkably, little fiber weight loss was detected even after 24 h of oxidation. Composites containing 19.2 volume percent (29.4 weight percent) VGCFs were prepared. Their flexural strengths and flexural moduli were obtained. The flexural strengths did not increase using oxidized VGCFs. Fiber surfaces were characterized using N₂ BET, CO₂ DR, XPS, SEM, TEM and base uptake measurements. Increasing the oxidation time produced only small initial increases in surface area up to a limit. Significant surface oxygen was present before oxidation and the amount increased initially, though not continuously, with nitric acid oxidation.}

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Bettelli, Mercedes Amelia. "Effect of Induction-Heat Post-Curing on Residual Stresses in Fast-Curing Carbon Fibre Reinforced Composites." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-80527.

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Manufacturing induced shape distortions is a common problem for composite materials. Due to the non-isotropic nature of carbon fibre reinforced polymers (CFRP) unavoidable deformations occur during part production. During fabrication of polymer composites, the material obtains its final shape at elevated temperatures. The curing process involves a transition from the liquid state to the solid, glassy state, allowing bonding between fibres and matrix. As the material cools the mismatch in thermal expansion coefficients and cure shrinkage obtained during the matrix polymerization leads to residual stresses on the mechanical level within composite part. There is a great interest from the aircraft and automotive industries, to increase the ability to understand development of shape distortions and residual stresses during the cure, since these deformations often lead to dissatisfaction of tolerances and it is essential to predict the deformations beforehand in order to compensate time and cost. In this context, a study of residual stresses during the curing process of thermosetting resin composites is presented. A methodology is proposed for predicting the formation and development of manufacturing- induced residual stresses. The present project reports on a comprehensive experimental study on the dependency of different short curing cycles on the build-up of residual stresses in a carbon fibre/fast-curing epoxy system and evaluate of post-curing methods through induction heating and oven post-curing with unidirectional [904] and unsymmetrical [9020] laminates. It includes characterization in thermo-elastic properties and degree-of-cure of the material by Thermal bending test, thermal expansion test, mechanical tensile test and Differential Scanning Calorimetry (DSC) in non-post-cured and post-cured laminates. The results showed slight variation in the thermal properties and not effect in the mechanical properties at different cure and post-curing conditions. Analytical data by Laminate Analysis program validated the experimental thermo-elastic data with analytical simulations. In addition, it is shown improvements in the temperature distributions in the post-curing by induction heating with different experimental set-ups, however, oven post-curing showed a more systematic system, higher heat efficient a low cure temperature, with more consistent mechanisms of shape distortions and residual stresses compared to induction heating. These findings are relevant for the future development of prediction methods for process induced deformations of Fast Curing Epoxy Resins (FCER).

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Mathole, Alinah Phindiwe. "The effect of epoxidised soybean oil on the curing and (THERMO) mechanical properties of epoxy resins." 2012. http://encore.tut.ac.za/iii/cpro/DigitalItemViewPage.external?sp=1001351.

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M. Tech. Polymer Technology.
Studies the effects of incorporating epoxidised soybean oil (ESO) in a standard bisphenol A-type epoxy resin (EP) cured by both amine and anhydride hardeners. The EP/ESO ratio was set for 100/0, 75/25, 50/50, 25/75 and 0/100 (wt./wt.). The investigations performed covered the curing, rheology (gelling), and thermomechanical analysis and thermogravimetric analysis of the sample produced.

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Botha, Surene. "Effect of accelarator on the curing, chemorheology, thermal and mechanical properties of benzoxazine and benzoxazine epoxy resins." 2014. http://encore.tut.ac.za/iii/cpro/DigitalItemViewPage.external?sp=1001362.

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M. Tech. Engineering: Chemical.
Aims to establish the cure kinetics of the thermosetting systems through the use of rheology and differential scanning calorimetry. Dynamic mechanical and thermal mechanical analyses will be used to ascertain the mechanical properties. The resistance to thermal degradation will be determined by thermogravimetric analysis.

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Peta, Neo Phyllis. "The effect of acrylated epoxidised soyabean oil on the curing and (THERMO) mechanical properties of vinyl ester resins." 2012. http://encore.tut.ac.za/iii/cpro/DigitalItemViewPage.external?sp=1001350.

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M. Tech. Polymer Technoliogy.
Studies the basic curing, rheological and thermomechanical behaviours of hybrids composed of a VE resin and acrylated epoxidised soyabean oil (AESO). The hybrid systems were cured by free radical initiated radical copolymerisation with styrene. The prospective outcomes were: To find suitable initiators/accelerators for the VE/AESO hybrids which work within the entire composition range? To contribute to the selection of VE resins for AESO modification To establish the optimal quantity of AESO required obtaining the best cure characteristics, the most acceptable reduction in Tg, and stiffness as compared with the parent VE resin.

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Books on the topic "Epoxy resins Physiological effect"

1

El-Sa'ad, Leila. The reverse thermal effect in epoxy resins and moisture absorption in semi-interpenetrating polymer networks. Salford: University of Salford, 1989.

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Book chapters on the topic "Epoxy resins Physiological effect"

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Philippenko, A. M., L. N. Mashlyakowsky, A. V. Ilyinykh, and A. G. Morozov. "Effect of Infrared Laser Radiation on Curing and Properties of Epoxy Resins." In MICC 90, 289–94. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3676-1_46.

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Pionteck, Jürgen. "pVT Analysis of the Effect of Addition of Thermoplastics, Block-Copolymers, or Rubbers on the Curing Behavior and Shrinkage of Epoxy Resins." In Handbook of Epoxy Blends, 799–823. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-40043-3_44.

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Pionteck, Jürgen. "pVT Analysis of the Effect of Addition of Thermoplastics, Block-Copolymers, or Rubbers on the Curing Behavior and Shrinkage of Epoxy Resins." In Handbook of Epoxy Blends, 1–26. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-18158-5_44-1.

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Ascione, Francesco, Luigi Granata, Liberata Guadagno, and Carlo Naddeo. "Influence of Hygrothermal Effect on the Mode II Fracture Toughness of Epoxy Resins for Civil Engineering Applications." In Lecture Notes in Civil Engineering, 2378–89. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-88166-5_206.

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Zhao, Li, and Dingbang Wei. "Study on reinforcement effect of modified epoxy resins by repeated loading." In Progress in Civil, Architectural and Hydraulic Engineering IV, 601–4. CRC Press, 2015. http://dx.doi.org/10.1201/b19383-122.

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Khomenko, A., E. G. Koricho, and M. Haq. "Monitoring the effect of micro-/nanofillers on curing-induced shrinkage in epoxy resins." In Fillers and Reinforcements for Advanced Nanocomposites, 461–75. Elsevier, 2015. http://dx.doi.org/10.1016/b978-0-08-100079-3.00018-1.

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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.

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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.

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Mir, Sajad Hussain, and Attiya Baddar. "Association between Urinary Bisphenol A Concentration and Obesity Prevalence in Children and Adolescents." In Handbook of Research on Environmental and Human Health Impacts of Plastic Pollution, 214–45. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-5225-9452-9.ch012.

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Bisphenol A is an organic compound that serves as a building block of polycarbonate plastics and epoxy resins. Being the world's highest-volume chemicals in use today in the form of medical devices, water and infant bottles, food cans, kitchen utensils, water supply pipes, compact devices, etc., this compound—after gaining an access to the body of an individual by way of leaching into food and water supplies—acts as an obesogen and disrupts the body weight regulation by either promoting adipogenesis or triggering the differentiation of fibroblasts into adipocytes. The other adverse effects of bisphenol A include insulin resistance, adipocyte differentiation or aromatase-mediated transformation of androgen into estrogen, cardiovascular diseases, liver function abnormalities, alterations in the circulating thyroid hormone levels, association with diabetes and carcinogenic effect. Its other aspects on health individually as well as in combination with other chemicals are worth mentioning.

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Conference papers on the topic "Epoxy resins Physiological effect"

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Champion, J. V. "The effect of absorbed water on electrical treeing in epoxy resins." In Seventh International Conference on Dielectric Materials, Measurements and Applications. IEE, 1996. http://dx.doi.org/10.1049/cp:19961023.

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Nobile, Maria Rossella, Carlo Naddeo, Marialuigia Raimondo, and Liberata Guadagno. "Effect of functionalized carbon nanofillers on the rheological behavior of structural epoxy resins." In THE 9TH INTERNATIONAL CONFERENCE ON STRUCTURAL ANALYSIS OF ADVANCED MATERIALS - ICSAAM 2019. AIP Publishing, 2019. http://dx.doi.org/10.1063/1.5140300.

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Hardoň, Štefan, Jozef Kúdelčík, Jaroslav Hornak, Pavel Trnka, Zoltán Adam Tamus, and Tomasz Koltunowicz. "Effect of ZnO nanoparticles on the dielectric properties of polyurethane and epoxy resins." In APPLIED PHYSICS OF CONDENSED MATTER (APCOM 2021). AIP Publishing, 2021. http://dx.doi.org/10.1063/5.0067378.

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Champion, J. V. "The effect of material composition and temperature on electrical tree growth in epoxy resins." In Eighth International Conference on Dielectric Materials, Measurements and Applications. IEE, 2000. http://dx.doi.org/10.1049/cp:20000472.

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5

Miller, Tim, Fabio Aguirre, and Ray Hudack. "New Specialty Resins for High Performance Fusion Bonded Epoxy Coatings." In 2012 9th International Pipeline Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/ipc2012-90561.

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In the last decade, the evolution in the exploration and transportation of oil and gas as well as efforts to delay the effect of corrosion on strategic and valuable assets like pipelines, have triggered the development of new Fusion Bonded Epoxy (FBE) anticorrosion coatings. A major component in a FBE formulation are solid epoxy resins, which when properly formulated enable the FBE coating to reach higher performance requirements to cope with the ever more challenging conditions in the field. This paper describes how solid epoxy resins (SER) can help high glass transition temperature FBE coatings to protect pipelines operating at high service temperatures from corrosion. A second area of innovation is a solid epoxy resin that helps FBE to cure at lower application temperatures than standard FBE coatings while maintaining the similar corrosion performance. Damage tolerance is the third area of innovation. Dow Coating Materials has developed an epoxy/copolymer resin system which helps the FBE formulator overcome the brittleness of FBE Abrasion Resistance Overcoat (ARO) at subzero temperatures.

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Pandini, Stefano, Fabio Bignotti, A. D’Amore, Domenico Acierno, and Luigi Grassia. "Strain Recovery Behavior Of Post-Yield Deformed Epoxy Resins: Effect Of The Resin∕Hardener Ratio." In V INTERNATIONAL CONFERENCE ON TIMES OF POLYMERS (TOP) AND COMPOSITES. AIP, 2010. http://dx.doi.org/10.1063/1.3455600.

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Hong, Jian, Dragana Radojcic, and Zoran Petrovic. "The Effect of Structure Regularity of Natural Oils on Properties of Oil-based Epoxy Resins." In 2022 AOCS Annual Meeting & Expo. American Oil Chemists' Society (AOCS), 2022. http://dx.doi.org/10.21748/whdh9748.

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One issue when utilizing natural oils as raw materials for preparing polymers in comparison with petrochemical starting materials is their complexity. Standard natural oils have typically very heterogeneous structure, which is reflected on properties of polymers. However, oils with regular structure such as high oleic oils, offer high degree of regularity approaching that of triolein. Cationic polymerization of epoxidized oils was carried in bulk using tris (pentafuorophenyl)borane. Epoxy resin made solely from epoxidized soybean oil (ESO) was compared with that from epoxidized high oleic algal (ETO) containing over 90 % oleic acid, with triolein as major component. Although epoxidized soybean oil had higher functionality (EOC content), the obtained algal epoxy resin displayed higher glass transition temperature than soybean resin’s. The possible reasons are high oleic algal oil has higher regularity and soybean oil contains high content of saturated fatty acid (15 %), which can act as plasticizer. Moreover, crosslinking in ESBO might involved formation of cyclics from neighboring epoxy groups present in epoxidized linoleic acid and higher local cross-linking density.

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Shalal, Taha Yassin Saleh, Rasha Mushtaq Hashim, and Abdul Adeem Zaily Hameed. "Effect of gamma radiation on some mechanical properties and thermal conductivity for pure epoxy resins." In THE 2ND UNIVERSITAS LAMPUNG INTERNATIONAL CONFERENCE ON SCIENCE, TECHNOLOGY, AND ENVIRONMENT (ULICoSTE) 2021. AIP Publishing, 2022. http://dx.doi.org/10.1063/5.0112660.

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Pikhurov, D. V., and Vjacheslav V. Zuev. "The effect of fullerene C60 on the mechanical and dielectrical behavior of epoxy resins at low loading." In TIMES OF POLYMERS (TOP) AND COMPOSITES 2014: Proceedings of the 7th International Conference on Times of Polymers (TOP) and Composites. AIP Publishing LLC, 2014. http://dx.doi.org/10.1063/1.4876876.

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RODRIGUEZ-UICAB, OMAR, JANDRO L. ABOT, and FRANCIS AVILÉS. "EFFECT OF CURING TEMPERATURE OF EPOXY RESIN ON THE ELECTRICAL RESPONSE OF CARBON NANOTUBE YARN MONOFILAMENT COMPOSITES." In Thirty-sixth Technical Conference. Destech Publications, Inc., 2021. http://dx.doi.org/10.12783/asc36/35778.

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The cyclic thermoresistive response of individual carbon nanotube yarns (CNTYs) embedded into epoxy resins is investigated. The influence of the temperature at which the epoxy resin cures on the thermoresistive response is investigated by using two epoxy resins, one that cures at room temperature and the other one that cures at 130 °C. Heating-cooling cycles ranging from room temperature (RT, 25 °C) to 80 °C, incremental cycles (RT to 40 °C, RT to 60 °C and RT to 80 °C) and incremental heating-dwell cycles are applied to monofilament composites, while their electrical resistance is simultaneously recorded. The monofilament composites showed a negative temperature coefficient of resistance during the heating-cooling cycles of -7.07x10-4 °C-1 for specimens cured at high temperature, and -5.93x10-4 °C-1 for specimens cured at room temperature. The hysteresis after the different heating-cooling cycles was slightly smaller for specimens cured at 130 °C, in comparison to specimens cured at room temperature. Several factors including the intrinsic thermoresistivity of CNTY, level of infiltration and the effect of curing temperature may explain the thermoresistive sensitivity of the monofilament composites.

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