Relevant bibliographies by topics / Polyurethanes Mechanical properties / Dissertations / Theses
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Dissertations / Theses on the topic 'Polyurethanes Mechanical properties'

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Published: 4 June 2021
Last updated: 9 February 2022

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1

Mace, Tamara Lee. "Phase segregation study of thermoplastic polyurethanes." Diss., Available online, Georgia Institute of Technology, 2004:, 2003. http://etd.gatech.edu/theses/available/etd-04072004-180051/unrestricted/mace%5ftamara%5fl%5f200312%5fms.pdf.

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2

Sormana, Joe-Lahai. "High-throughput impact characterization of mechanical properties in combinatorially prepared segmented polyurethaneurea elastomers." Thesis, Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/10104.

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3

Zhang, Lizhong. "Physical, mechanical, thermal, and viscoelastic properties of water-blown rigid polyurethane foam containing soy flours /." free to MU campus, to others for purchase, 1998. http://wwwlib.umi.com/cr/mo/fullcit?p9924871.

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4

Guillot, François M. "Investigation of the electromechanical properties of electrostrictive polymers." Diss., Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/16842.

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5

Li, Yang. "Application of cellulose nanowhisker and lignin in preparation of rigid polyurethane nanocomposite foams." Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/44746.

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Cellulose nanowhisker (CNW) prepared by acid hydrolysis of softwood Kraft pulp was incorporated as nanofiller in rigid polyurethane (PU) foam synthesis. The density, morphology, chemical structure, mechanical properties and thermal behavior of the products were characterized. The nanocomposites exhibited better performance especially at high CNW¡¯s content which was probably due to the high specific strength and aspect ratio of CNW, the hydrogen bonding and crosslinking between CNW and polymer matrix, a higher crosslinking density compared to the control, and the function of CNW as an insulato
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6

Tatu, Rigwed R. "Effects of Aqueous Chlorhexidine Gluconate Exposure on Thermal, Mechanical and Chromatographic Properties of Polycarbonate and Polyether Urethanes." University of Cincinnati / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1407408200.

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7

Aquino, Fábio Gosi de. "Estudo do envelhecimento de poliuretanos aplicados na indústria de petróleo." Universidade do Estado do Rio de Janeiro, 2009. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=2425.

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A indústria do petróleo é um dos setores com maior número de sistemas produtivos empregando alta tecnologia. O Brasil é mundialmente renomado como um líder na extração de petróleo, em águas profundas e ultraprofundas. Dentro da cadeia produtiva, grande parte do petróleo e do gás produzido é escoado através de dutos flexíveis que conectam os poços de produção com as plataformas. Existem dois segmentos dessas linhas que recebem diferentes denominações de acordo com o seu local de aplicação. Quando estão apoiadas sobre o fundo do mar, em condição de serviço estático, são denominados flowlines e q
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Joe-Lahai, Sormana. "Combinatorial Synthesis and High-Throughput Characterization of Polyurethaneureas and Their Nanocomposites with Laponite." Diss., Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/11640.

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Segmented polyurethaneureas (SPUU) are thermoplastic elastomers with excellent elastic properties, high abrasion resistance and tear strength, making them very useful in numerous industrial applications ranging from microelectronics (slurry pad) to biomedical (artificial heart vessels) applications. The elastic and mechanical properties of these materials are strongly influenced by their two phase morphology. The factors that influence phase separation include difference in polarity between the hard and soft phases, composition and temperature. In general good phase separation results in m
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MOURAO, ROGERIO P. "Amortecedores de impacto em embalagens para transporte de materiais radioativos: uma metodologia para sua avaliacao." reponame:Repositório Institucional do IPEN, 2002. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11068.

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Made available in DSpace on 2014-10-09T12:47:47Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:06:33Z (GMT). No. of bitstreams: 1 08364.pdf: 6489589 bytes, checksum: 1e73a94458be296353fbd0a5d5f21ab4 (MD5)<br>Tese (Doutoramento)<br>IPEN/T<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP
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BENEGA, MARCOS A. G. "Estudo e desenvolvimento de fonte de fósforo-32 imobilizado em matriz polimérica para tratamento de câncer paravertebral e intracranial." reponame:Repositório Institucional do IPEN, 2015. http://repositorio.ipen.br:8080/xmlui/handle/123456789/23702.

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Submitted by Claudinei Pracidelli (cpracide@ipen.br) on 2015-06-09T18:38:57Z No. of bitstreams: 0<br>Made available in DSpace on 2015-06-09T18:38:57Z (GMT). No. of bitstreams: 0<br>Dissertação (Mestrado em Tecnologia Nuclear)<br>IPEN/D<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
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Teixeira, André Luiz. "Utilização de resíduos de poliuretano expandido na moldagem por injeção de compósito de matriz de polietileno de alta densidade." Universidade Federal de São Carlos, 2017. https://repositorio.ufscar.br/handle/ufscar/8996.

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Submitted by Milena Rubi (milenarubi@ufscar.br) on 2017-08-16T14:17:38Z No. of bitstreams: 1 TEIXEIRA_Andre_2017.pdf: 23449389 bytes, checksum: c2eafb920ec024ab4ae56b9b0007cff3 (MD5)<br>Approved for entry into archive by Milena Rubi (milenarubi@ufscar.br) on 2017-08-16T14:17:46Z (GMT) No. of bitstreams: 1 TEIXEIRA_Andre_2017.pdf: 23449389 bytes, checksum: c2eafb920ec024ab4ae56b9b0007cff3 (MD5)<br>Approved for entry into archive by Milena Rubi (milenarubi@ufscar.br) on 2017-08-16T14:17:53Z (GMT) No. of bitstreams: 1 TEIXEIRA_Andre_2017.pdf: 23449389 bytes, checksum: c2eafb920ec024ab4ae56b9b
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Kau, Chia-Chiun James. "Mechanical properties and deformation mechanisms of polyurethane materials." Case Western Reserve University School of Graduate Studies / OhioLINK, 1991. http://rave.ohiolink.edu/etdc/view?acc_num=case1055883413.

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13

Yusoh, Kamal. "Subsurface and bulk mechanical properties of polyurethane nanocomposite films." Thesis, Loughborough University, 2010. https://dspace.lboro.ac.uk/2134/6313.

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A series of exfoliated and intercalated polyurethane (PU) organoclay nanocomposites, polyurethane-graphite oxide (GO) and polyurethane carbon nanotubes (single-walled (SWNT) and multi-walled carbon nanotubes (MWNT)) were prepared by in situ polymerization. It is believed that the preparation of polymer/clay or polymer/CNTs nanocomposites with homogeneous dispersion of nanofillers in the matrices is a crucial step to developing high-performance polymer nanocomposites. The effects of various organoclays and carbon nanotubes (CNTs), polyol types and dispersion situation i.e. intercalation or exfo
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14

Gibbon, Luke Ryan. "Effects of Green Reinforcement Strategies on Mechanical Properties of High Volume Polymers." Thesis, North Dakota State University, 2013. https://hdl.handle.net/10365/26664.

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Green reinforcement in polymer systems have shown great promise in reducing cost, negative environmental effects, and dependency on nonrenewable resources. Both natural fillers and composite regrind can increase mechanical performance, while reducing new resin inputs for polymer based components. PVC and Polyurethane foam are widely used in North America in high volumes. Ground corn cob greatly increased the modulus of a flexible PVC system while minimally reducing maximum strength. The corn cob also showed signs of being a suitable filler in a polyurethane foam composite panel at low concentr
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15

Baker, James. "Synthesis and dynamic mechanical properties of polyurethane/crown ether based rotaxanes." Thesis, Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/9471.

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16

Ng, Grace Siu-Yee 1980. "Effect of chemical mechanical planarization processing conditions on polyurethane pad properties." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/43618.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2003.<br>Includes bibliographical references (leaves 58-59).<br>Chemical Mechanical Planarization (CMP) is a vital process used in the semiconductor industry to isolate and connect individual transistors on a chip. However, many of the fundamental mechanisms of the process are yet to be fully understood and defined. The difficulty in analyzing the CMP process lies in the fact that many factors, such as properties of consumables, polishing speed, polishing pressure, etc, can affect the outcome of t
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17

Oliveira, Fernando de. "Lignopoliuretanos: preparação, caracterização e aplicação em compósitos de sisal." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/75/75134/tde-25022015-082454/.

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A valorização racional da lignina e seus derivados é um dos maiores desafios ligado às biorrefinarias em que estas macromoléculas são geradas como subprodutos. Os lignossulfonatos, obtidos através do processo de polpação sulfito da madeira, são produzidos em larga escala e pouco utilizados como reagentes na preparação de compostos macromoleculares. A presença de grupos OH em sua estrutura permite o seu uso como macromonômero na obtenção de poliuretanos (PUs). O presente estudo teve como meta a obtenção de lignopoliuretanos e de compósitos baseados principalmente em matérias primas obtidas a pa
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18

Vasco, Marina Cardozo. "Efeito da radiação gama sobre as propriedades mecânicas de compósito de fibras de sisal/poliuretana sem uso de agentes de acoplamento." Universidade Tecnológica Federal do Paraná, 2014. http://repositorio.utfpr.edu.br/jspui/handle/1/1067.

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Compósitos de fibras naturais com matriz polimérica tem sido foco de estudos por possuírem boas propriedades mecânicas e baixo peso, o que permite sua utilização em diversos meios, incluindo ambientes hospitalares, salas de radioterapia e radiodiagnóstico. Sua grande dificuldade é a falta de afinidade dos materiais componentes, causando distanciamento da interface e baixa transferência de carga entre a matriz e o reforço. Uma alternativa podem ser os compósitos à base de fibras naturais e poliuretana derivada do óleo de mamona. A incidência de radiação pode levar à degradação do material polim
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19

Protzek, Giuliana Ribeiro. "Obtenção e caracterização de compósito verde de casca de pinhão e poliuretana derivada do óleo de mamona." Universidade Tecnológica Federal do Paraná, 2017. http://repositorio.utfpr.edu.br/jspui/handle/1/3014.

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Compósitos verdes são caracterizados por possuir matriz polimérica e reforço derivado de fontes naturais. Polímeros derivados do petróleo não são biodegradáveis e possuem solventes orgânicos na sua composição. Solventes orgânicos são tóxicos e poluentes. A poliuretana derivada do óleo de mamona é derivada de fonte renovável, biodegradável e não possui solventes orgânicos em sua composição. A casca de pinhão é um resíduo do pinhão, semente do pinheiro de Paraná. O objetivo desse trabalho é desenvolver e caracterizar o compósito de casca de pinhão com PU derivada do óleo de mamona. A fibra foi c
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20

Almeida, Hugo Filipe Delgado. "Electrospun polyurethane biomembranes for vascular grafts." Master's thesis, Universidade de Aveiro, 2017. http://hdl.handle.net/10773/22589.

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Mestrado em Materiais e Dispositivos Biomédicos<br>Um dos grandes desafios da engenharia de tecidos (TE) vasculares, prende-se com a pouca disponibilidade de tecidos vasculares autólogos para substituição de vasos sanguíneos de pequeno diâmetro (<6 mm). Estudos demonstram que o poliuretano possui propriedades mecânicas adequadas para a utilização em vasos sanguíneos de pequenos diâmetros. Trabalhos anteriores realçam as propriedades antibacterianas de compósitos compostos por PU e nanopartículas de oxido de zinco (nZnO). O presente estudo teve como objetivo a produção de membranas compósitas
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21

Girouard, Natalie. "Cellulose nanocrystal thermoset composites: A physical and chemical route to improving dispersion and mechanical properties." Diss., Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/54928.

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Cellulose nanocrystals (CNCs) are crystalline nanoparticles that are extracted from renewable sources such as trees or bacteria through mechanical or chemical treatments of their source. CNCs are of interest to several research communities concerned with sustainable technologies. Specifically, CNCs have attracted great interest in the polymer composite community given their high theoretical specific strength and modulus. Two key obstacles surround the use of CNCs in polymer composites, namely their comparatively lower thermal stability and hydrophilicity render their dispersion, and therefore
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22

Toon, Bradley E. "INVESTIGATION OF BLAST MITIGATION PROPERTIES OF CARBON AND POLYURETHANE BASED FOAMS." UKnowledge, 2008. http://uknowledge.uky.edu/gradschool_theses/520.

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Solid foams have been studied for years for their ability to mitigate damage from sudden impact. Small explosive attacks threaten to damage or destroy key structures in some parts of the world. A newly developed material, carbon foam, may offer the ability to mitigate the effects of such blasts. This project investigates the energy absorbing properties of carbon and polyurethane based foams in dynamic compression to illustrate their viability to protect concrete structures from the damaging effects of pressure waves from a small blast. Cellular solid mechanics fundamentals and a survey of the
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23

Solouki, Bonab Vahab. "Polyurethane (PU) Nanocomposites; Interplay of Composition, Morphology, and Properties." Case Western Reserve University School of Graduate Studies / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=case1542634359353501.

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24

Williams, Sharlene Renee. "Influence of Electrostatic Interactions and Hydrogen Bonding on the Thermal and Mechanical Properties of Step-Growth Polymers." Diss., Virginia Tech, 2008. http://hdl.handle.net/10919/29397.

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Current research efforts have focused on the synthesis of novel, segmented, cross-linked networks and thermoplastics for emerging technologies. Tailoring macromolecular structures for improved mechanical performance can be accomplished through a variety of synthetic strategies using step-growth polymerization. The synthesis and characterization of novel Michael addition networks, ionene families, and ion-containing polyurethanes are described, with the underlying theme of fundamentally investigating the structure-property relationships of novel, segmented macromolecular architectures. In addit
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Bump, Maggie Bobbitt. "The Effect of Chemistry and Network Structure on Morphological and Mechanical Properties of Diepoxide Precursors and Poly(Hydroxyethers)." Diss., Virginia Tech, 2001. http://hdl.handle.net/10919/27350.

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This dissertation research addresses the interrelationships between chemistry and network structure in epoxy networks as well as how mechanical properties of the resulting networks are affected by these relationships. The effects of chemistry and network structure on interphase morphology and performance in vinyl ester/carbon fiber composites have also been investigated on both a macro and nanoscale. Thermosets were prepared with blends of bisphenol-A and novel phosphine oxide based diepoxide oligomers using a siloxane or a novolac crosslinking agent. In the siloxane cured networks the inc
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Yuan, Dian. "TPU NANOCOMPOSITES WITH 1D AND 2D CARBONEOUS FILLERS." Case Western Reserve University School of Graduate Studies / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=case1427896892.

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27

Kuběna, Martin. "Zpevnění polymerních kompozitů uhlíkovými nanotrubkami." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-230848.

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This diploma thesis focuses on the influence of carbon nanotubes (CNTs) on the mechanical properties of a composite material with polyurethane (PU) matrix. The material was supplied in the form of thin films with thickness from 0.2 mm to 1.2 mm. The theoretical part of this thesis describes the production technology, properties and applications of composite materials PU/CNTs, and also deals with preparation technology and properties of both components of this composite material separately. The theoretical part also describes the principle of tensile testing of polymer materials. The experiment
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Saetung, Anuwat. "Preparation of polyurethane foams from hydroxytelechelic oligoisoprenes obtained by controlled degradation of natural rubber : study of their physico-mechanical, thermal, and acoustic properties." Le Mans, 2009. http://cyberdoc.univ-lemans.fr/theses/2009/2009LEMA1006.pdf.

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Les mousses de polyuréthane constituent les matériaux polyuréthane les plus largement étudiés et utilisés pour de nombreuses applications telles que l'ameublement, l'automobile, l'isolation thermique et phonique. Les composés hydroxylés couramment utilisés pour la production des mousses de polyuréthane sont des produits issus de la pétrochimie (polyols à base de polyesters ou de polyéthers). Ces produits ont le désavantage d'être issus de sources non renouvelables pouvant provoquer des pollutions de l'environnement et risquant de se tarir à court terme. Le caoutchouc naturel constitue un matér
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Gholami, Mohammad Sadegh. "Development of innovative passive polyurethane foam with higher absorption and/or insulation performance." Thèse, Université de Sherbrooke, 2017. http://hdl.handle.net/11143/10532.

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Les mousses de polyuréthane (PU) hautement poreuses sont largement utilisées dans différentes industries pour dissiper l’énergie des ondes sonores et vibratoires. La propagation des ondes acoustiques dans ces matériaux poroélastiques est décrite à partir d’un ensemble de paramètres physiques connus sous le nom de paramètres de Biot (pour les matériaux isotropes, ils sont composés de 5 paramètres non acoustiques et de 4 paramètres mécaniques). Il est bien connu que les propriétés macroscopiques dépendent intrinsèquement des propriétés de la microstructure de la mousse. Ainsi, une co
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Bertoni, Fabiano. "Desenvolvimento de um módulo de compensação para ajuste de deslocamento utilizando molas de poliuretano." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2010. http://hdl.handle.net/10183/60738.

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A intensa demanda por petróleo aliado às novas descobertas de poços em condições ainda inexploradas, propulsionam a pesquisa e desenvolvimento de novos componentes e materiais para a indústria petrolífera. A alta responsabilidade desses componentes, como Risers e Bend Stiffners, requer, que antes da sua aplicação em campo, seja realizada uma verificação através de ensaios experimentais, desenvolvidos com o objetivo de representar ao máximo todas as condições em campo. No presente trabalho, um sistema de compensação de deslocamento, com molas elastoméricas, foi desenvolvido para simular um comp
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Heaton, Brian Craig. "A Shape Memory Polymer for Intracranial Aneurysms: An Investigation of Mechanical and Radiographic Properties of a Tantalum-Filled Shape Memory Polymer Composite." Thesis, Available online, Georgia Institute of Technology, 2004:, 2004. http://etd.gatech.edu/theses/available/etd-07092004-155026/unrestricted/heaton%5Fbrian%5Fc%5F200407%5Fms.pdf.

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Thesis (M.S.)--School of Materials Science and Engineering, Georgia Institute of Technology, 2005. Directed by Janet Hampikian.<br>Zhuqing Zhang, Committee Member ; Roger Narayan, Committee Member ; Brent Carter, Committee Member ; Janet Hampikian, Committee Chair. Includes bibliographical references.
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Al-Taee, Shaymaa. "Evaluation of thermal and mechanical properties of the composite material of LignoBoost- lignin and recycled polyurethan : A preliminary feasibility study for a novel composite material from waste materials." Thesis, Karlstads universitet, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-65194.

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The purpose of this study was to investigate the possibility of producing a composite material of lignoBoost- lignin and recycled polyurethane. Also, the study evaluated the thermal and mechanical properties of the composite materials. These properties were investigated in a number of steps by applying different: additives, concentrations, conditions (temperature, time, and pressure), and equipment. The results from the preliminary trials show that it was impossible to produce a composite material from lignin/polyurethane blends. Hence, the blends were modified by adding acrylate and glycerol
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Longlade, Jérémy. "Synthèse de nouveaux additifs pour peinture : applications aux peintures polyurethane et epoxy et impact sur les propriétés des films." Thesis, Mulhouse, 2015. http://www.theses.fr/2015MULH8634.

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Cette thèse en partenariat industriel s’intéresse aux peintures polyuréthane et époxy utilisées à des fins protectrices pour des applications ferroviaires. L’objectif de ce projet est de développer de nouveaux additifs spécifiques à ces peintures afin d’améliorer les propriétés mécaniques et adhésives des films sur acier, tout en gardant une bonne dispersion des charges minérales présentes dans la formulation. Des additifs polymères ont été développés. Ces polymères miscibles avec la résine ont été synthétisés par polymérisation cationique (technique du monomère activé) ou anionique coordinée,
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Jaudouin, Olivier. "Physico-chimie de matériaux à base d'élastomères modifiés hyperélastiques." Thesis, Montpellier 2, 2012. http://www.biu-montpellier.fr/florabium/jsp/nnt.jsp?nnt=2012MON20036.

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Cette thèse vise à développer des matériaux destinés à remplacer les gants des boîtes à gants utilisées en milieu nucléaire confiné par des disques élastomères pouvant prendre la forme des mains lorsqu'un opérateur insère son bras et revenir à leur forme initiale lorsqu'il l'enlève. Le but du travail est de réaliser et d'étudier les propriétés physico-chimiques de matériaux capables de se déformer à plus de 2000 %, à être totalement élastique, à résister au déchirement et aux radiations. Dans un premier temps, une étude bibliographique a montré que les matériaux les plus susceptibles d'y répon
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Lima, Mirian Dayse Furtado. "Utilização de resíduos da espécie Dipteryx polyphylla (Cumarurana), Dipteryx odorata (Cumaru) e Brosimum parinarioides (Amapá) na produção de painéis de madeira aglomerada com resina poliuretana à base de óleo da mamona." Universidade Federal do Amazonas, 2012. http://tede.ufam.edu.br/handle/tede/4609.

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Jin, Shu-Rong. "Cinetiques de formation de reseaux polymeres interpenetres a base de polyurethanne et de poly (methacrylate de methyle)." Université Louis Pasteur (Strasbourg) (1971-2008), 1986. http://www.theses.fr/1986STR13328.

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Etude par spectrometrie ftir. La reaction est probablement controlee par la vitesse de dissociation de l'amorceur. La polymerisation du mma est acceleree en presence du reseau polyurethanne. Le reseau elastomere peut etre considere comme "solvant" de viscosite infinie dans lequel on prepare le deuxieme reseau. Influence de la cinetique sur les proprietes dynamomecaniques
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Gaston, Amélie. "Développement d'une élastomère thermoplastique constitutif d'assemblages composites hates performances." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSEI153.

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L'objet de cette thèse est de développer un matériau polymère élastomère permettant d'assurer la liaison et d'absorber les déformations imposées entre deux matériaux composites à matrice thermoplastique. Différents élastomères thermoplastiques ont été identifiés et leur comportement thermomécanique a été étudié en comparaison d’un élastomère thermodurcissable utilisé jusqu'alors. Les polyuréthanes thermoplastiques (TPU) sont apparus comme une alternative intéressante. Nous en avons étudié la chimie et la microstructure ainsi que les propriétés mécaniques en traction et le comportement lors de
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Galdino, Danilo Soares. "Análise do desempenho do painel de madeira compensada produzido com lâminas termorretificadas por dois diferentes métodos e coladas com resina poliuretana. /." Guaratinguetá, 2020. http://hdl.handle.net/11449/192358.

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Orientador: Cristiane Inácio de Campos<br>Resumo: Nos últimos anos, o estudo do tratamento térmico na indústria madeireira vem chamando a atenção dos pesquisadores por ser mostrar como uma proposta de preservação sustentável em comparação aos tratamentos químicos tradicionalmente realizados. Com base nisto, este trabalho teve por objetivo avaliar o desempenho do painel compensado produzido com lâminas termorretificadas e coladas com a resina poliuretana à base de óleo de mamona, uma alternativa para substituição do adesivo fenol-formaldeído, que possui a vantagem de ser de origem natural e de
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Rauber, Renata. "Caracterização de painéis aglomerados com madeira de eucalipto e sólidos granulares de poliuretano." Universidade Federal de Santa Maria, 2011. http://repositorio.ufsm.br/handle/1/8694.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>The objective of the present study was to evaluate the performance of particleboards fabricated with different proportions of Eucalyptus grandis Hill ex Maiden wood and polyurethane granular solids from the footwear sector of Três Coroas/RS city, using as a binding agent Elastan 8004/BR®, a pre-polymer modified polyisocyanate MDI based. The proportions of polyurethane granular solids and wood particles used were 0/100, 15/85, 30/70, 45/55 e 60/40% (m/m). The performance of the panels was evaluated by density, moisture content
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Signoret, Christian. "Réseaux polyuréthannes classiques et contenant des motifs furanniques pour le confinement de déchets radioactifs : relations structure-propriétés." Grenoble INPG, 1989. http://www.theses.fr/1989INPG0088.

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Etude des proprietes mecaniques, de la stabilite thermique de la diffusion de l'eau et de sels radioactifs dans des polyurethannes. Les polyetherurethannes souples ont un comportement moyen a la temperature et a la diffusion. Les polyesterurethannes ont un meilleur comportement mais sont hydrolyses rapidement les polyetherurethannes rigides (tv=20 a 40#oc) sont le meilleur compromis; amelioration de la tenue en temperature vers 350-500#oc par addition de derives furanniques
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Fonseca, Beatriz Condesso Macedo Lobo da. "Thermomechanical characterization of shape-memory polymeric composites." Master's thesis, Universidade de Aveiro, 2016. http://hdl.handle.net/10773/21209.

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Mestrado em Engenharia Mecânica<br>The shape-memory materials are nowadays an important subject in the scienti c community due to their huge technological potential. These materials have the capability of being triggered by an external stimulus and, consequently, change their shape. Considering the recent development of the biomedical industry, this dissertation aims to develop the applicability of shape-memory materials into biomedical devices, enabling a more e cient operability. Therefore, the shape-memory polyurethane was chosen to this end due to their high biocompatibility and pro
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Bendaikha, Tahar. "Photopolymérisation réticulante de macromères multifonctionnels : comportement photochimique de réseaux polyacryliques tridimensionnels." Mulhouse, 1986. http://www.theses.fr/1986MULH0016.

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Cinétique de la photopolymérisation des macromères multiacrylates, influence des constituants de la résine photosensible; influence de l'oxygène sur la photopolymérisation de résines multiacrylates; influence de l'intensité lumineuse; caractéristiques des réseaux polymères photoréticulés. Photodégradation des réseaux époxy-acrylates; photooxydation des polyuréthannes acrylates réticules
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"Reinforcement of syntactic foam with SiC nanoparticles." Thesis, Florida Atlantic University, 2009. http://purl.flvc.org/FAU/359923.

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In this investigation, polymer precursor of syntactic foam has been reinforced with SiC nanoparticles to enhance mechanical and fracture properties. Derakane 8084 vinyl ester resin was first dispersed with 1.0 wt% of SiC particles using a sonic cavitation technique. In the next step, 30.0 wt% of microspheres (3M hollow glass borosilicate, S-series) were mechanically mixed with the nanophased vinyl ester resin, and cast into rectangular molds. A small amount of styrene was used as dilutant to facilitate mixing of microspheres. The size of microspheres and SiC nanoparticles were 20-30 um and 30-
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Sharifpoor, Soror. "Influence of Degradable Polar Hydrophobic Ionic Polyurethanes and Cyclic Mechanical Strain on Vascular Smooth Muscle Cell Function and Phenotype." Thesis, 2011. http://hdl.handle.net/1807/31938.

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Vascular tissue engineering (VTE) with the use of polymeric scaffolds offers the potential to generate small-diameter (<6 mm) arteries. In this thesis, a degradable polar hydrophobic ionic (D-PHI) polyurethane porous scaffold was synthesized with the objective of demonstrating its potential application for VTE. D-PHI scaffold synthesis was optimized, maximizing isocyanate and methacrylate monomer conversion. Through the incorporation of a lysine-based crosslinker, scaffold mechanical properties and swelling were manipulated. Furthermore, D-PHI scaffolds demonstrated the ability to support the
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an, Chen Jan, and 陳建安. "Mechanical Properties of Mica-flakes-added Thermoplastic Polyurethane Composites." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/50629936467193070798.

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Ting, Wei-Ping, and 丁緯平. "Mechanical Properties of Glass-Flakes-Reinforced Injection- Molded Polyurethane Composites." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/38959253491667138555.

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YUAN, YANG MIN, and 楊敏原. "Study of Mechanical Properties of Polyurethane Based on Polyols and Toluene Diisocyanate." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/84040663559600044337.

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碩士<br>靜宜大學<br>應用化學系<br>89<br>Polyurethanes have been prepared from TDI and two kinds of polyols, PPG and PTMEG, based on two polyols PPG (polypropylene glycol) (diol or triol) or PTMEG (polytetramethylene ether glycol) and TDI(toluene diisocyanate) were synthesized in various concentrations of extender MOCA(3,3’-dichloro-4,4’-diamino-diphenylmethane) with different equivalent ratio NCO/OH 1.04~1.44, and at different temperature .The mechanical and physical properties including tensile strength, hardness, tear strength, elasticity ,resistant abrasion, resistant acid and alkali properties, et
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Hsieh, Jung-Yan, and 謝宗燕. "A study on the Electrical and Mechanical properties of the Conductive Polyurethane Products." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/79512412422796562760.

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碩士<br>國立臺北科技大學<br>有機高分子研究所<br>90<br>Polyurethane (PU) has been applied widely since the 19th century for its low cost and easy allocates to fabricate either softy and tough elastomers or high hardness and abrasion-resistant rigid materials. Although UV-cut additives could make PU have effective UV protection, the effects decrease with aging and projecting sunlight. Besides, there are no relevant reports till now about the electrostatic protection effect for such materials. Therefore, the feasible study of the blend for the PU with UV cut and electrostatic protection were investigated in this
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Hsu, Yu-Lung, and 徐瑜隆. "A Study on the Electrical and Mechanical Properties of Polypyrrole / Polyurethane Composite Films." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/f668hs.

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碩士<br>國立臺北科技大學<br>有機高分子研究所<br>97<br>Polypyrrole (PPy), possesses good processibility and excellent environmental stability. Therefore the PPy is an idea conducting polymer material widely applied to corrosion resistance, electricity charged color of display, light battery, etc. In this study, polypyrroles (PPy) with different constitutions where synthesized by using ammonium peroxydisulfate (APS) and adding DSSS (Dioctyl sulfosuccinate sodium salt, Na+ (DEHS-)). Polyurethane (PU) was chosen in this study to fabricate with PPy the composite films. The FT-IR and XRD instruments were applied t
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Jhan, Jyun-Jie, and 詹鈞傑. "Thermal properties and mechanical properties of thermoplastic polyurethane (TPU) and carbon black blends with different particle size." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/errwc3.

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碩士<br>國立臺北科技大學<br>有機高分子研究所<br>105<br>The Thermoplastic Polyurethane (TPU) is an elastomer plastic that can be heated and processed. Many companies will recycle and reuse thermoplastic polyurethanes (TPU).However, during the production or processing process, different additives or fillers can improve the physical properties and make the price down. The main purpose of carbon black is mainly used as a variety of rubber supplements because it is cheap as a irreplaceable and traditional nanomaterial. The thermal properties and crystallization of TPU with varous sized carbon black were investigated
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