Gotowe bibliografie tematyczne / POM

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Gotowa bibliografia na temat „POM”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 31 stycznia 2023

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Artykuły w czasopismach na temat "POM"

Martin, Denis-Constant, François Borel, Marc-Olivier Gonseth, Jacques Hainard i Roland Kaehr. "Pom pom pom pom, musiques et caetera". Cahiers de musiques traditionnelles 11 (1998): 257. http://dx.doi.org/10.2307/40240319.

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Rachdantia, Dheasari. "ECLECTIC STYLE P0M-POM BLANKET". Corak 9, nr 2 (11.02.2021): 119–28. http://dx.doi.org/10.24821/corak.v9i2.3792.

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GONZALEZ-GUTIERREZ, Joamin, Gustavo Beulke STRINGAR, Barbara ZUPANČIČ, Galina KUBYSHKINA, Bernd VON BERNSTORF i Igor Emri. "Time-Dependent Properties of Multimodal Polyoxymethylene based binder for Powder Injection Molding". Anali PAZU 1, nr 2 (17.05.2022): 129–38. http://dx.doi.org/10.18690/analipazu.1.2.129-138.2011.

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Powder injection molding (PIM) is one of the most versatile methods for the manufacturing of small complex shaped components from metal, ceramic or cemented carbide powders for the use in many applications. PIM consists of mixing the powder and a polymeric binder, injecting this mixture in a mold, debinding and then sintering. Catalytic debinding of polyoxymethylene (POM) is attractive since it shows high debinding rates and low risk of cracking. This work examines the possibility of using bimodal POM as the main component of the binding agent by studying its time-dependent and thermal properties and comparing them to monomodal POM. Furthermore, possible optimization of the binder formulation was investigated by the addition of short molecular weight polymeric chains (wax) to bimodal POM, as to create a multimodal material. It was observed that the magnitude of the complex viscosity for the commercial bimodal material was more than 2 times lower than for the chemically identical monomodal POM within the investigated frequency range. Viscosity values were observed to drop as the content of wax was increased, without compromising thebinders mechanical properties in solid state. A new formulation of bimodal POM plus 8 wt.% of added wax provided the most appropriate results from investigated combinations. This work has shown how the addition of short polymeric chains in POM influences its time-dependent properties in solid and molten state, which can be an important tool for the optimization of binders designed to be used in PIM technology.

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Jiao, Qi, Qin Chen, Lian Wang, Hualin Chen i Yongjin Li. "Investigation on the Crystallization Behaviors of Polyoxymethylene with a Small Amount of Ionic Liquid". Nanomaterials 9, nr 2 (5.02.2019): 206. http://dx.doi.org/10.3390/nano9020206.

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Polyoxymethylene (POM) blends with excellent stiffness–toughness balance are successfully developed using Tributyl(octyl)phosphonium bis(trifloromethanesulfonyl) imide (TBOP-TFSI), one type of room-temperature ionic liquid, as the nucleating agent. Crystallization behaviors of POM blends have been studied by differential scanning calorimetry (DSC) and polarized light microscopy (PLM). The incorporation of TBOP-TFSI induces the crystal nucleation and fine crystal grain of POM, and also a much shorter hemi-crystalline time with only 0.5 wt% addition. The nucleation effect of ionic liquid leads to considerable improvement in the impact strength of POM blends while not sacrificing its tensile strength. Moreover, antistatic properties with a long-time stable performance are achieved by TBOP-TFSI addition as the electrical resistance reaches 1011 Ω/sq.

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Rumetna, Matheus Supriyanto, i Tirsa Ninia Lina. "PELATIHAN MENGHITUNG HASIL PENJUALAN ROKOK SELAMA MASA PANDEMI COVID-19 MENGGUNAKAN METODE SIMPLEKS DAN SOFTWARE POM-QM". Jurnal Pendidikan dan Pemberdayaan Masyarakat (JPPM) 8, nr 1 (1.07.2021): 69–77. http://dx.doi.org/10.36706/jppm.v8i1.14110.

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Perkembangan dalam bidang industri semakin maju serta dampak pandemi Covid-19, membuat usaha-usaha berskala kecil harus terus bersaing dan berinovasi. Salah satunya adalah pemilik usaha Kios Ibu Olan. Ibu Olan mengalami masalah dalam memaksimalkan keuntungan dari hasil penjualan rokok. Untuk memaksimalkan keuntungan yang diperoleh Ibu Olan, maka tim Pengabdian kepada Masyarakat (PkM) Program Studi Sistem Informasi Universitas Victory Sorong menawarkan pengunaan Program Linier (PL) dengan Metode Simpleks dan teknologi informasi berupa software POM-QM for windows 5.0. Selain itu tim PkM juga menerapkan pendekatan pendidikan masyarakat, dalam hal ini tim PkM melakukan pelatihan untuk menghitung bersama keuntungan dari hasil penjualan rokok. Pelatihan ini bertujuan meningkatkan pemahaman serta kesadaran pemilik usaha sekaligus merupakan hasil akhir dari kegiatan PkM ini.Kata kunci: metode simpleks, pelaku usaha, pelatihan, software POM-QM Abstract: Developments in the industrial sector are increasingly advanced as well as the impact of the Covid-19 pandemic, making small-scale businesses have to continue to compete and innovate. One of them is Mrs. Olan's business owner. Mrs. Olan is having trouble maximizing the profit from selling cigarettes. To maximize the benefits obtained by Ms. Olan, the Community Service Team (PkM) of the Information Systems Study Program at the University of Sorong Victory offers the use of the Linear Program (PL) with the Simplex Method and information technology in the form of POM-QM software for windows 5.0. In addition, the PkM team also applies a community education approach, in this case the PkM team conducts training to jointly calculate the profit from the sale of cigarettes. This training aims to increase the understanding and awareness of business owners as well as the final result of this PkM activity.Keywords: simplex method, business actors, training, POM-QM software

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Lee, Jae Wook, Dukjoon Kim i Youngdon Kwon. "Mathematical characteristics of the pom-pom model". Rheologica Acta 41, nr 3 (1.04.2002): 223–31. http://dx.doi.org/10.1007/s00397-001-0216-9.

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Yang, Xi-Ya, Wen-Jing Li, Zeng-Long Tan, Jing-Quan Sha, Zhi-Bo Tong, Yu Zhang i Ya-Qian Lan. "Polyoxometalate-pillared metal–organic frameworks synthesized by surfactant-assisted strategy and incorporated with carbon nanotubes for energy storage". Journal of Materials Chemistry A 8, nr 47 (2020): 25316–22. http://dx.doi.org/10.1039/d0ta08976a.

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Two new crystalline POM-pillared 3D porous arrays, Co-PMo and Co-PW, have been synthesized. The Co-PMo/CNTs nanocomposites with increased effective sites and excellent conductivity exhibit excellent energy storage performance.

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Liu, Ying, Mengchu Zeng, Zhe Xie, Daliang Ning, Jizhong Zhou, Xi Yu, Rulong Liu, Li Zhang i Jiasong Fang. "Microbial Community Structure and Ecological Networks during Simulation of Diatom Sinking". Microorganisms 10, nr 3 (17.03.2022): 639. http://dx.doi.org/10.3390/microorganisms10030639.

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Microbial-mediated utilization of particulate organic matter (POM) during its downward transport from the surface to the deep ocean constitutes a critical component of the global ocean carbon cycle. However, it remains unclear as to how high hydrostatic pressure (HHP) and low temperature (LT) with the sinking particles affects community structure and network interactions of the particle-attached microorganisms (PAM) and those free-living microorganisms (FLM) in the surrounding water. In this study, we investigated microbial succession and network interactions in experiments simulating POM sinking in the ocean. Diatom-derived 13C- and 12C-labeled POM were used to incubate surface water microbial communities from the East China Sea (ECS) under pressure (temperature) of 0.1 (25 °C), 20 (4 °C), and 40 (4 °C) MPa (megapascal). Our results show that the diversity and species richness of the PAM and FLM communities decreased significantly with HHP and LT. Microbial community analysis indicated an increase in the relative abundance of Bacteroidetes at high pressure (40 MPa), mostly at the expense of Gammaproteobacteria, Alphaproteobacteria, and Gracilibacteria at atmospheric pressure. Hydrostatic pressure and temperature affected lifestyle preferences between particle-attached (PA) and free-living (FL) microbes. Ecological network analysis showed that HHP and LT enhanced microbial network interactions and resulted in higher vulnerability to networks of the PAM communities and more resilience of those of the FLM communities. Most interestingly, the PAM communities occupied most of the module hubs of the networks, whereas the FLM communities mainly served as connectors of the modules, suggesting their different ecological roles of the two groups of microbes. These results provided novel insights into how HHP and LT affected microbial community dynamics, ecological networks during POM sinking, and the implications for carbon cycling in the ocean.

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Khadempir, Sara, Ali Ahmadpour, Mohammad Taghi Hamed Mosavian, Narges Ashraf, Fatemeh F. Bamoharram, Rodrigo Fernández-Pacheco, Jesús M. de la Fuente i Scott G. Mitchell. "Mechanistic insights into the activation process in electrocatalytic ethanol oxidation by phosphomolybdic acid-stabilised palladium(0) nanoparticles (PdNPs@PMo12)". RSC Advances 6, nr 7 (2016): 5359–66. http://dx.doi.org/10.1039/c5ra22698h.

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Meinander, P. O., i Joji Taketomi. "POM System". JAPAN TAPPI JOURNAL 57, nr 12 (2003): 1773–82. http://dx.doi.org/10.2524/jtappij.57.1773.

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Rozprawy doktorskie na temat "POM"

Condon, Katherine Elyse. "Quantifying Catchment-Scale Particulate Organic Matter (POM) Loss Following Fire, Relative to Background POM Fluxes". Thesis, The University of Arizona, 2013. http://hdl.handle.net/10150/301557.

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This study investigates translocation of particulate carbon and nitrogen from burned and unburned catchments within New Mexico's Valles Caldera National Preserve following severe wildfire. My research questions are: (1) how much carbon and nitrogen is eroded from burned slopes and re-deposited in debris fans? and (2) how do these quantities compare to fluvial export of particulate carbon and nitrogen from nearby unburned catchments? Results indicate that the ~200 kg ha⁻¹ of nitrogen per depositional area on the debris fans represents ~50 to 100 years' worth of atmospheric inputs. In total, 124 times more carbon and 21 times more nitrogen were deposited on the two fans than was exported in particulate form from all three unburned catchments combined in water year 2012. My findings suggest that post-fire erosion may increase nitrogen loading to downslope environments, with the potential to alter the biogeochemical budgets of both aquatic and terrestrial systems.

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Boyce, John S. "Linking PPBES and the POM with capabilities". Thesis, Monterey, Calif. : Naval Postgraduate School, 2006. http://bosun.nps.edu/uhtbin/hyperion.exe/06Dec%5FBoyce.pdf.

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Bartsch, Ralf, Jens Sumpf i André Bergmann. "Friction Temperature of POM–PE Sliding Contacts". Universitätsbibliothek Chemnitz, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-231659.

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The design of traction mechanisms of continuous conveying units (e. g. plastic chains) is so far based on a purely mechanical dimensioning. However, mechanical limits are only applicable in a limited way to avoid system failure. With higher speeds or pressure, especially the thermal stress increases, which results in system failure based on softening or melting of the materials at a certain temperature. By means of systematic studies, correlations between friction temperature, coefficient of friction, wear and process parameters are examined. On this basis, a model for calculating the friction temperature is developed
Die Konstruktion von Zugmitteln für kontinuierliche Fördereinheiten (z. B. Kunststoffketten) beruht bisher auf einer rein mechanischen Dimensionierung. Allerdings sind mechanische Grenzwerte zur Vermeidung von Systemausfall nur bedingt anwendbar. Bei größeren Geschwindigkeiten oder Druck erhöht sich insbesondere die thermische Beanspruchung, was bei einer bestimmten Temperatur zum Systemausfall durch Erweichung oder Schmelzen der Werkstoffe führt. In systematischen Untersuchungen wurden die Korrelationen zwischen Reibungstemperatur, Reibungskoeffizient, Verschleiß und den Prozessparametern untersucht. Auf dieser Basis wurde ein Modell zur Berechnung der Reibungstemperatur entwickelt

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Hu, Yinghe. "Solution Behavior Of The Pom-Based Hybrid". University of Akron / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=akron159026996643792.

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Simcik, Thomas A. "Reengineering the Navy Program Objectives Memorandum (POM) process". Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1996. http://handle.dtic.mil/100.2/ADA326955.

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Thesis (M.S. in Management) Naval Postgraduate School, December 1996.
Thesis advisor(s): Larry R. Jones, Jerry L. McCaffery. "December 1996." Includes bibliographical references (p. 103-106). Also available online.

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Haouche, Mohamed. "Etude expérimentale de l’écoulement d’un PEBD à travers un contraction 3D : Simulation numérique avec un modèle constitutif différentiel de type pom-pom". Saint-Etienne, 2006. http://www.theses.fr/2006STET4001.

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La thèse présentée comporte deux parties. Une partie expérimentale qui consiste à étudier le caractère tridimensionnel de l'écoulement d'un PEbd dans des contractions brusques (planes et 3D). La cinématique de ce type d'écoulement a été mise en évidence par la technique du suivi des particules colorées. Dans les contractions planes, l'écoulement secondaire est caractérisé par un mouvement spiralé des particules dans la troisième direction, du plan de symétrie vers les parois latérales, avant de rejoindre l'écoulement principal en aval de la contraction. Avec les contractions purement 3D, le même type de cinématique a été observé : l'écoulement secondaire dans les vortex est orienté des plans de symétrie médians vers les plans de symétrie diagonaux, puis les particules rejoignent l'écoulement principal dans le chenal. La biréfringence induite par l'écoulement d'un PEbd dans une contraction plane confirme l'importance des effets 3D sur la distribution des contraintes globales. Ces effets sont détectés par la forme des franges isochromatiques en amont et en aval de la contraction. Dans les conditions 3D, ces franges ont une forme aplatie en amont avec l'apparition de franges en forme « W » en aval de la contraction, contrairement au cas 2D où nous avons observé une forme des franges en aile-papillon en amont de la contraction et l’absence de franges « W » en aval. Concernant l'origine de franges « W », notre étude montre que leur présence est corrélée avec la cinématique tri-dimensionnelle de ce type d'écoulement ; la possibilité de les observer dépend de la dimension de la géométrie dans la direction neutre. Dans la deuxième partie, une comparaison entre l’expérience et la simulation a été effectuée en terme de cinématique et de contraintes, ce qui constitue un critère de sélection important pour les modèles constitutifs. Les résultats obtenus confirment la pertinence du modèle Pom-Pom différentiel à prédire les écoulements du PEbd dans des géométries complexes, ainsi que l'importance d'une analyse 3D pour ce type d’études
The present PhD work contains two principal parts. The first part is dedicated to the experimental characterization of the 3D viscoelastic flow of LDPE in different contraction geometries. This study is focused on the global flow kinematics characterized in terms of experimental particle tracking and image analysis as well as on the stress distribution characterized in terms of flow induced birefringence. It was presented a detailed analysis of the complex three-dimensional motion of the secondary flow inside the vortex region. In contrary to the two-dimensional axisymmetric flow, where the secondary vortex motion is completely separated from the bulk flow, the detected 3D vortex was proven experimentally to be open with much more complex flow kinematics. In the case of 3D planar contraction flow the material is entering the vortex region at the plane of symmetry and gradually moving to the side wall where it goes to the slit die of the contraction. In the case of 3D square to square and square to circular contraction geometry, the material is entering the vortex region at the median planes and moves in helical manner to the diagonal planes of symmetry where it goes to the capillary die of the geometry. The flow induced birefringence confirms the 3D character of the stress distribution. The main character of the 3D viscoelastic stress distribution is expressed by the presence of more flatten type of fringes in the upstream part of the contraction as well as the appearance of specific “W” shaped fringes at the beginning of the downstream part. In fact our results give the first confirmation of the 3D nature of the “W” fringes. The second part presents an extensive comparison between the experimental results of part 1 and the 3D numerical simulations based on the recently proposed Pom Pom differential model. A good up to excellent agreement in terms of flow kinematics and stress distribution was observed. These encouraging results confirm the excellent predictive capabilities of the Pom Pom differential model as well as the necessity of full 3D numerical analysis for this kind of complex 3D flows

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Mansouri, Rad Mohammad. "Passive Optical Network (POM) Monitoring using Optical Coding Technology". Thesis, Université Laval, 2010. http://www.theses.ulaval.ca/2010/26923/26923.pdf.

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Luo, Jiancheng. "Self-Assembly of Polyoxometalate (POM)-Containing Hybrids: From Amphiphilicity to Architecture". University of Akron / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=akron1428001115.

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Vilà, Ramírez Narciso. "Effects of melt blended poss nanofillers on pom and ABS thermal stability". Doctoral thesis, Universitat Politècnica de Catalunya, 2014. http://hdl.handle.net/10803/145685.

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This PhD thesis investigated the incorporation of Polyhedral Oligomeric Silsesquioxanes (POSS) in thermoplastic base materials via melt-blending procedures. Particularly, a focus is taken on the enhancement of the thermal resistance through the addition of different types of POSS on two popular engineering plastics known by their low thermal stability, one being a semi-crystalline copolymer i.e. polyoxymethylene (POM) and the other an amorphous copolymer i.e. acrylonitrile butadiene styrene grafted with maleic anhydride (ABS-g-Ma). Different nanocomposites have been produced, from which its morphology, miscibility, structure, thermal properties and appearance behaviour before and during the thermoxidative degradation is herein quantified and discussed together with the resulting benefits and drawbacks. All the nanocomposites have been produced via melt-blending, using the nanofillers Glycidyl, Glycidyl-Isobutyl, Aminopropyl-isobutyl and Poly(ethylene-glycol) for the POM matrix, and Amino-Propyl Isobutyl, Glycidyl, and Trisilanol for the ABS-g-Ma matrix. The incorporation adequacy of the nanofillers into the matrix has been pre-assessed with the Hoy¿s solubility calculation method and later on corroborated with scanning electron microscopy (SEM) and differential scanning calorimetry (DSC). The quantification of the thermal degradation behaviour of each sample at different temperatures and exposure times was carried out through Fourier transform infrared spectrography (FTIR), thermogravimetric analysis (TGA) including the degradation kinetics and, ultimately, the sample appearance progress has been assessed in terms of yellowing by means of colour spectrophotometry (Cielab). The results showed that the presence of different POSS's used with the POM matrix improves dramatically the thermal stability of the base material and that such improvement is proportionate to the solubility compatibility between matrix and the nanofiller. The best performance was found with Aminopropyl-isobutyl, whereby the temperature of maximum rate of degradation (TMAX) increased by 22ºC. Said improvement is also seen in the conditions at which the nanocomposite developed only 2% of carbonyl yield and 8% of yellowing compared to the standard POM copolymer, which is taken as the base reference with 100% deterioration suffered in the above two indicators. However, the performance of the different nanocomposites produced in this work with ABS-g-Ma has not been as encouraging as the POM-based nanocomposites described above. Although the SEM morphological analysis show adequate incorporation and miscibility of the nanofillers into the matrix, the GPOSS and the TPOSS nanocomposites provided no relevant improvements in thermal stability when compared to the base ABS-g-Ma, and the APOSS blend exhibits a very slight decay in almost all the quantitative analysis carried out in this work.
Los avances producidos en años recientes en el campo de la nanotecnología y sus aplicaciones en los materiales están aportando grandes mejoras en el rendimiento de los mismos en áreas como la resistencia mecánica, estabilidad térmica, propiedades ópticas y eléctricas, entre otras. Por otro lado, el mundo de la ingeniería y el diseño de componentes plásticos está llevando los materiales cada vez más a su límite, con el fin de poder ofrecer el máximo rendimiento al mínimo coste. Esta realidad implica la necesidad creciente de customizar estructuras poliméricas con propiedades mejoradas en áreas específicas para cada aplicación. A pesar de los desarrollos que se han estado produciendo últimamente en nanocompuestos termoplásticos, el conocimiento en este campo es aún limitado, y requiere de más iniciativas de investigación y desarrollo sobre el amplio campo de posibilidades que nos ofrecen los nanocompuestos. El objetivo de esta tesis es contribuir en el conocimiento de los nanocompuestos a través del estudio de los efectos de varias nanocargas del tipo Polyhedral Oligomeric Silsesquioxanes (POSS) en el comportamiento de la resistencia térmica del copolímero semicristalino polióxido de metileno (POM) y del terpolímero amorfo acrilonitrilo‐butadieno‐estireno (ABS), los cuales son dos plásticos técnicos susceptibles a la termoxidación. Diferentes nanocompuestos se han elaborado con el fin de estudiar su morfología, miscibilidad, estructura, propiedades térmicas y apariencia, así como los beneficios y contrapartidas que resultan de ellos. Los nano‐compuestos han sido elaborados mediante el método de mezcla en estado fundido (melt‐blending), utilizando cuatro nano‐cargas distintas para el POM, siendo Glicidil, Glicidil‐Isobutil, Aminopropil‐isobutil y Poli(etilen‐glicol), y tres nano‐cargas para el ABS, siendo Amino‐Propil Isobutil, Glicidil y Trisilanol La compatibilidad teórica de las nano‐cargas se ha calculado mediante el método de solubilidad de “Hoy”, y se ha corroborado con microscopia electrónica de barrido (SEM) y calorimetría diferencial de barrido (DSC). Posteriormente, cada material base y sus distintas variantes de nano‐compuestos se han sometido a diferentes condiciones de termo‐oxidación en términos de temperatura y tiempo de exposición. El comportamiento a la degradación de cada muestra se ha cuantificado mediante los métodos de espectroscopia de infrarrojos por transformada de Fourier (FTIR), análisis de termogravimetría (TGA) incluyendo cinética de degradación, y finalmente mediante espectrofotometría (Cielab) para definir el progreso de la apariencia de la muestra en términos de amarilleamiento. Los resultados derivados de la inclusión de los diferentes POSS utilizados en la matriz de POM han mejorado sustancialmente la estabilidad térmica del mismo, y dicha mejora es proporcional a la compatibilidad de solubilidades entre el POM y los POSS utilizados. El mejor comportamiento se produce con la incorporación de la nanocarga aminopropilisobutil, con una temperatura de máxima degradación (TMAX) incrementada en 22 ºC sobre la TMAX del POM original tomado como referencia. Esta mejora se refleja también con una reducción muy notable en la formación grupos carbonilo y en el amarilleamiento sufrido en la superficie de la muestra, siendo un 2% y 8% respectivamente comparados con los resultados obtenidos con la muestra equivalente del material POM original. En referencia a los nanocompuestos basados en ABS‐g‐Ma, a pesar de la adecuada solubilidad teórica entre la matriz y las diferentes nano‐cargas, así como la buena miscibilidad obtenida en la elaboración de las muestras y evidenciada en el análisis morfológico SEM, no se han podido obtener mejoras en términos de estabilidad térmica. Concretamente, la adición de GPOSS y TPOSS no han aportado beneficios relevantes en las propiedades del nanocompuesto final, y la nanocarga APOSS ha incluso afectado negativamente a la matriz con una ligera caída de la resistencia térmica.
Els avenços produïts en els últims anys tant en el camp de la nanotecnología com en les seves aplicacions en els materials, està contribuint en la millora del rendiment dels mateixos en àeras com la resistència mecànica, l’estabilitat tèrmica, i les propietats òptiques i elèctriques entre d’altres. Per altra banda, el món de l’enginyería i el disseny de components plàstics està portant els materials cada vegada més al seu límit amb la finalitat de poder oferir el màxim rendiment al mínim cost, i això comporta una necessitat creixent de customitzar les estructura polimèriques amb propietats especificament millorades en àreas molt concretes en funció de l’aplicació requerida. A pesar del desenvolupament que s’ha estat produint últimament en l’àrea de nanocompostos plàstics, el coneixement en aquest camp és encara limitat, i requereix de més iniciatives d’investigació per cobrir el potencial que ofereix aquesta classe de materials, així com conèixer també les seves limitacions. L’objectiu d’aquesta tesi es el de contribuïr en l’enteniment dels nanocompostos plàstics a través de l’estudi dels efectes de vàries nanocàrregues del tipus Polyhedral Oligomeric Silsesquioxanes (POSS) en el comportament de la resistència tèrmica del poli(òxid de metilè) (POM) com a material semicristalí, i l’acrilonitril‐butadiè‐estirè (ABS) com a material amorf. Val a dir que la selecció d’aquests dos polímers tècnics ha estat en part motivada per la seva susceptibilitat inherent a la termodegradació. Diferents nanocompostos basats amb aquests materials s’han elaborat amb la finalitat d’estudiar la seva morfología, miscibilitat, estructura, propietats tèrmiques i aparença, així com els beneficis i contrapartides que resulten d’ells. La preparació dels nanocompostos ha sigut mitjançant el mètode de barreja en estat fos (melt‐blending), util.litzant quatre nano‐càrregues diferentes per el POM, siguent glicidil, glicidil‐Isobutil, aminopropil‐isobutil y poli(etilenè‐glicol), i tres nano‐càrregues per el ABS, siguent amino‐propil isobutil, glicidil i trisilanol. La compatibilitat teòrica de les nano‐càrregues s’ha calculat mitjançant el mètode de solubitat de “Hoy”, i s’ha corroborat amb microscopia electrònica d’escombrat (SEM) i calorimetría diferencial d’escombrat (DSC). Posteriorment s’ha sotmès cada material base i les seves diferents variants de nanocompostos a diferents condicions de termo‐oxidació en termes de temperatura i temps d’exposició. El comportament a la degradació de cada mostra s’ha quantificat mitjançant els mètodes d’espectroscopía d’infraroigs per transformada de Fourier (FTIR), anàlisis de termogravimetría (TGA) incloent cinemàtica de degradació, i finalment mitjançant espectrofotometría (Cielab) per a definir el progrés de l’aparença de la mostra en termes d’engroguiment. Els resultats han mostrat, per una banda, que la inclusió dels diferents POSS util.litzats en la matriu de POM ha millorat substancialment l’estabilitat tèrmica del mateix, i aquesta millora és proporcional a la compatibilitat entre les solubitats del POM i del POSS. El millor comportament s’ha produït amb l’adició de la nano‐càrrega d’aminopropilisobutil, amb una temperatura de màxima degradació (TMAX) millorada en 22ºC en relació a la obtinguida amb la matriu de POM. Aquesta millora també es reflexa amb una reducció molt notable en la formació de grups carbonil i en l’engroguiment sofert en la superfície de la mostra, siguent un 2% i 8% respectivament comparats amb els resultats obtinguts amb la mostra equivalent del material POM original. En contrast, els nanocompostos basats en ABS‐g‐Ma no han ofert millores en termes d’estabilitat tèrmica, a pesar d’una adequada solubitat teòrica entre la matriu i les diferents nano‐càrregues util.litzades, així com la bona miscibilitat obtinguda en l’elaboració de les mostres i posteriorment evidenciada en l’anàlisi morfològic SEM. Concretament l’adició de GPOSS i de TPOSS no han aportat beneficis en les propietats del nanocompostos final, i la nano‐càrrega APOSS ha afectat negativament a la matriu amb una lleuguera caiguda de la resistència tèrmica

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Loureiro, Margarida Cristina Ramos. "Híbridos POM/celulose/sílica para a oxidação de COV em ar poluído". Master's thesis, Universidade de Aveiro, 2013. http://hdl.handle.net/10773/12176.

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Mestrado em Engenharia Química
Nesta dissertação pretendeu-se avaliar a atividade catalítica de polioxometalatos à base de vanádio (H4PMo11VO40 e H5PMo10V2O40), suportados em materiais híbridos de celulose-sílica (HCS-V e HCS-V2, respetivamente) para a oxidação de compostos orgânicos voláteis (COV) presentes no ar poluído. Além disso, também se sintetizou, caracterizou e testou um novo POM à base de ruténio α-SiW9Ru4), suportado em híbridos de celulose-sílica (HCS-Ru). A caracterização do HCS-Ru foi realizada por análise termogravimétrica (TGA), difração de raios-X (XRD), análise elementar, espectroscopia de infravermelho com transformadas de Fourier (FTIR) e por espectroscopia de refletância difusa. Desta análise foi possível concluir quanto à maior estabilidade térmica e menor cristalinidade do híbrido em comparação com a pasta celulósica de origem. Por outro lado, também foi possível confirmar a presença do polioxometalato e determinar a relação molar W/Ru no HCS-Ru. Os estudos de oxidação foram efetuados com ar poluído urbano, por amostragem direta ou em saco, passando o ar em tubos com HCS-POM (catalisador) em paralelo com tubos contendo o HCS (branco). A corrente efluente foi introduzida em tubos de adsorção, contendo resinas porosas Carbopack-B e Carbopack-C, pelo método de amostragem ativa. Os COV foram analisados num sistema constituído por um injetor de desadsorção térmica acoplado a um cromatógrafo de fase gasosa com detetor de ionização de chama (GC/FID). Os materiais HCS-V e HCS-V2 apresentam elevada atividade catalítica na oxidação de diferentes famílias de COV, mostrando-se o catalisador HCS-V mais eficaz que o catalisador HCS-V2. Também foi testado o efeito de alguns parâmetros que poderiam influenciar a atividade dos catalisadores, tais como a composição do ar (amostragem on-line ou em saco), a presença de água (trap com carbonato de potássio), o método de síntese dos catalisadores e a presença de ozono (trap com iodeto de potássio). O teste de atividade catalítica ao HCS-Ru permitiu confirmar a elevada atividade catalítica para a degradação de COV, revelando-se assim bastante promissor na sua utilização em catálise oxidativa.
The aim of the present work was to evaluate the catalytic activity of vanadium polyoxometalates (H4PMo11VO40 and H5PMo10V2O40), supported on cellulosesilica hybrid materials (HCS-V and HCS-V2, respectively) for the oxidation of volatile organic compounds (VOC) in polluted air. Furthermore, a new ruthenium catalyst α-SiW9Ru4), supported on cellulose-silica hybrid materials (HCS-Ru) was synthesized, characterized and tested. The characterization of HCS-Ru was done by thermogravimetric analysis (TGA), X-ray diffraction (XRD), elemental analysis, Fourier Transform Infrared Spectra (FTIR) and diffuse reflectance spectroscopy. These analyses revealed that hybrid materials have higher thermal stability and lower crystallinity than the corresponding cellulose material. Besides, the presence of polyoxometalate was confirmed and the molar ratio W/Ru in HCS-Ru was determined. The oxidation studies were carried out with polluted urban air by passing it through tubes with the HCS-POM (catalyst) and HCS (blank). The exit stream was introduced into adsorbent tubes with porous resins Carbopack B and Carbopack-C by the active sampling method. The VOC were analyzed in a system with a thermal desorption injector and gas chromatograph with flame ionization detector (GC/FID). The catalysts HCS-V and HCS-V2 have high activity for the oxidation of different families of VOC, being the catalyst HCS-V more effective than the HCS-V2. Parameters such as the composition of the sampled air (sample online or in bag), the presence of water (trap with potassium carbonate), the synthesis of the catalyst and the presence of ozone (trap with potassium iodide) were also studied. The catalytic activity test confirmed the high activity of HCS-Ru for the degradation of VOC, revealing this material as very promising for oxidative catalysis.

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Książki na temat "POM"

McGuire, Leslie. Pom Pom. [Foster City, Calif.]: Gateway Learning Corp., 1998.

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McGuire, Leslie. Pom Pom. [Foster City, Calif.]: Gateway Learning Corp., 1998.

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McGuire, Leslie. Pom Pom. [Foster City, Calif.]: Gateway Learning Corp., 1998.

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Pom pom. Sŏul Tʻŭkpyŏlsi: Sinwŏn Munhwasa, 1992.

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Murray, Stephen. Pom-pom zombies. Venice, FL: Eldridge Pub. Co., 1997.

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Roselyne, Cazazian, red. Pom-pom girls. Montréal: Parfum d'encre, 2012.

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Kwŏn, Un-sang. Kyŏul pam pom param. Sŏul: Paeksan Sŏdang, 1991.

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Pascal, Francine. The pom-pom wars. London: Bantam, 1995.

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Pomeranian: Pom pom ado. New York, N.Y: Bearport Pub., 2009.

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Copyright Paperback Collection (Library of Congress) i Pascal Francine, red. The pom-pom wars. New York: Bantam Books, 1995.

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Części książek na temat "POM"

Gooch, Jan W. "POM". W Encyclopedic Dictionary of Polymers, 578. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_9279.

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Steiner, G., i C. Zimmerer. "Polyoxymethylene (POM)". W Polymer Solids and Polymer Melts – Definitions and Physical Properties I, 856–63. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-32072-9_94.

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Hashimoto, Tamotsu, i Toshikazu Sakaguchi. "POM (Polyoxymethylenes), Polyacetals". W Encyclopedia of Polymeric Nanomaterials, 1–7. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-36199-9_256-1.

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Bashford, David. "Polyoxymethylene; Polyacetals (POM)". W Thermoplastics, 255–67. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-009-1531-2_47.

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Hashimoto, Tamotsu, i Toshikazu Sakaguchi. "POM (Polyoxymethylenes), Polyacetals". W Encyclopedia of Polymeric Nanomaterials, 2103–8. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-642-29648-2_256.

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Bedoui, Fahmi, i Bruno Fayolle. "POM Mechanical Properties". W Polyoxymethylene Handbook, 241–55. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781118914458.ch9.

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Birge, John R. "Pom and Finance". W The Routledge Companion to Production and Operations Management, 360–73. New York : Routledge, 2017.: Routledge, 2017. http://dx.doi.org/10.4324/9781315687803-19.

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Malhotra, Manoj K., Ramkumar Janakiraman, Saurabh Mishra i Moonwon Chung. "POM and Marketing". W The Routledge Companion to Production and Operations Management, 374–91. New York : Routledge, 2017.: Routledge, 2017. http://dx.doi.org/10.4324/9781315687803-20.

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Gray, David, i Nicola M. Shadbolt. "Pom in Agriculture". W The Routledge Companion to Production and Operations Management, 467–96. New York : Routledge, 2017.: Routledge, 2017. http://dx.doi.org/10.4324/9781315687803-25.

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Gaur, Vishal. "Pom and Retailing". W The Routledge Companion to Production and Operations Management, 579–97. New York : Routledge, 2017.: Routledge, 2017. http://dx.doi.org/10.4324/9781315687803-31.

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Streszczenia konferencji na temat "POM"

Ramanjaneyulu, G., i R. Rajendran. "Study of Wear Behaviour of POM/Graphite and POM/MoS2 Composites". W International Conference on Advances in Design, Materials, Manufacturing and Surface Engineering for Mobility. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2017. http://dx.doi.org/10.4271/2017-28-1988.

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Wagner, M. H., V. H. Rolón-Garrido, Albert Co, Gary L. Leal, Ralph H. Colby i A. Jeffrey Giacomin. "Verification of Branch Point Withdrawal in Elongational Flow of Pom-Pom Polystyrene Melt". W THE XV INTERNATIONAL CONGRESS ON RHEOLOGY: The Society of Rheology 80th Annual Meeting. AIP, 2008. http://dx.doi.org/10.1063/1.2964711.

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Kurniawan, Yohannes, Verica Cornelia, Ciuiggri Langitiska, Winna Young, Norizan Anwar i Johan. "Analysis of The Effectiveness Of Social Media Instagram (A Case Study at Pom-Pom Café)". W 2021 International Conference on Information Management and Technology (ICIMTech). IEEE, 2021. http://dx.doi.org/10.1109/icimtech53080.2021.9535018.

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Maccarini, G., C. Merla, C. Ravasio, A. Bongiorno, I. Fassi i C. Pagano. "Influence of Micro Injection Moulding Process Parameters on Mechanical Characteristics of POM and POM/CNT Composites". W Proceedings of the 4M/ICOMM2015 Conference. Singapore: Research Publishing Services, 2015. http://dx.doi.org/10.3850/978-981-09-4609-8_069.

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Shammas, Monica, Edward Luibrand i Linda Hess. "Acid Resistant POM for Fuel System Components". W WCX SAE World Congress Experience. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2020. http://dx.doi.org/10.4271/2020-01-0231.

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Wang, Hsueh-Sheng, Kuo-Yang Huang, Hsien-Chih Peng, Yuh-Jeen Huang i Fan-Gang Tseng. "A high efficient POM micro-methanol reformer". W 2012 7th IEEE International Conference on Nano/Micro Engineered and Molecular Systems (NEMS). IEEE, 2012. http://dx.doi.org/10.1109/nems.2012.6196815.

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Rahmiati, Desti, i Bondan Prihastomo. "Kajian Kenyamanan Pengunjung Pada Taman POM IX Palembang". W Temu Ilmiah IPLBI 2018. Ikatan Peneliti Lingkungan Binaan Indonesia, 2018. http://dx.doi.org/10.32315/ti.7.a009.

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Wang, Kuansan, Nikolas Gloy i Xiaolong Li. "Inferring search behaviors using partially observable Markov (POM) model". W the third ACM international conference. New York, New York, USA: ACM Press, 2010. http://dx.doi.org/10.1145/1718487.1718514.

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Xudong Guan, Yiling Yang i Jinyuan You. "POM-a mobile agent security model against malicious hosts". W Proceedings Fourth International Conference/Exhibition on High Performance Computing in the Asia-Pacific Region. IEEE, 2000. http://dx.doi.org/10.1109/hpc.2000.843621.

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Zhang, Jing, Jianguo Lin, Xingli Sun i Chunliang Chen. "Application of an Improved Wetting and Drying Scheme in POM". W 2009 International Conference on Energy and Environment Technology. IEEE, 2009. http://dx.doi.org/10.1109/iceet.2009.342.

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Raporty organizacyjne na temat "POM"

Bahr, J. P. Return the Decision-Analysis Methodology to the POM Development Process. Fort Belvoir, VA: Defense Technical Information Center, luty 2010. http://dx.doi.org/10.21236/ada536962.

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Peggion, Germana. Advanced Modeling System for the Gulf of Mexico: Evaluation and Validation of the NRL-POM Relocatable Model. Fort Belvoir, VA: Defense Technical Information Center, grudzień 2001. http://dx.doi.org/10.21236/ada404729.

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Venaas, S., M. Brig i A. Jonasson. PIM Flooding Mechanism (PFM) and Source Discovery (SD). RFC Editor, marzec 2018. http://dx.doi.org/10.17487/rfc8364.

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Hong, Weiwei, i Jean Parsons. Guo Poem. Ames: Iowa State University, Digital Repository, listopad 2016. http://dx.doi.org/10.31274/itaa_proceedings-180814-1665.

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Bontha, Jagannadha R., Franz Nigl, Dennis R. Weier, Richard J. Leigh, Eric D. Johnson, Wayne A. Wilcox, David M. Pfund, Aaron W. Baumann i Yeefoo Wang. PJM Controller Testing with Prototypic PJM Nozzle Configuration. Office of Scientific and Technical Information (OSTI), sierpień 2009. http://dx.doi.org/10.2172/967226.

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Nelson, O. D. Portable exhausters POR-004 SKID B, POR-005 SKID C, POR-006 SKID D storage plan. Office of Scientific and Technical Information (OSTI), wrzesień 1997. http://dx.doi.org/10.2172/341248.

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Gellens, R. POP URL Scheme. RFC Editor, sierpień 1998. http://dx.doi.org/10.17487/rfc2384.

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Chacha, Tenzi, i Matalie M. Howard. Soda Pop Punk. Ames: Iowa State University, Digital Repository, 2014. http://dx.doi.org/10.31274/itaa_proceedings-180814-1022.

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Mayer, Michael F. Double Spin Asymmetry in (pol)d((pol)e,e'p)n. Office of Scientific and Technical Information (OSTI), maj 2013. http://dx.doi.org/10.2172/1432782.

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Knobbe, M. W. Analysis of PEM electrolyzers. Office of Scientific and Technical Information (OSTI), lipiec 1998. http://dx.doi.org/10.2172/334216.

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