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Dissertations / Theses on the topic 'Elastomers'

Author: Grafiati
Published: 4 June 2021
Last updated: 25 July 2025

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1

Singh, Mohinder. "Modelling the rheological behaviour of elastomers and elastomer compounds." Thesis, Loughborough University, 1990. https://dspace.lboro.ac.uk/2134/13753.

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The purpose of this research project is to model the rheological behaviour of elastomers and elastomer compounds. Two elastomers (natural rubber, SMR 20 and chlorosulphonated polyethylene, Hypalon 40) and three different grades of carbon black at three different levels of loading were chosen for this study. Mixing was carried out with a Farrel Bridge BR Banbury mixer, followed by subsequent milling on a two-roll mill. Rheological measurements were made with parallel plate, cone and plate and Negretti biconical rotor TMS rheometers . . The effect of temperature on viscosity was investigated by
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2

Zhu, Lin. "Development of elastomers and elastomeric nanocomposites from plant oils." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 275 p, 2006. http://proquest.umi.com/pqdweb?did=1068271741&sid=6&Fmt=2&clientId=8331&RQT=309&VName=PQD.

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3

Nuwayri, Mohamad O. "The modes of action of lubricants in elastomers and elastomer compounds." Thesis, Loughborough University, 1988. https://dspace.lboro.ac.uk/2134/14081.

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To modify the rheological behaviour of rubber compounds, in order to improve their processing behaviour, lubricants based on fatty acid derivatives are added at the mixing stage. This research has been directed towards identifying the modes of action of commercially available lubricants in a number of elastomers and elastomer compounds, with the objective of providing a rational basis for the further development of lubricants. The primary tool for rheological measurement was an advanced biconical rotor rheometer (Negretti TMS Rheometer); and a capillary rheometer was used to provide an indepen
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4

Scetta, Giorgia. "Fatigue cracking of thermoplastic elastomers." Electronic Thesis or Diss., Université Paris sciences et lettres, 2020. http://www.theses.fr/2020UPSLS022.

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Les élastomères thermoplastiques de polyuréthane (TPU) sont une classe de copolymères à blocs caractérisés par une élasticité réversible et une excellente résistance à l'abrasion. Ils sont déjà utilisés dans un certain nombre d’applications de type caoutchouc telles que semelles, roues, câbles flexibles, etc. Pourtant, le comportement en fatigue du TPU sous chargement cyclique n'a pas été étudié en détail, et plusieurs questions restent ouvertes sur la meilleure façon de prédire la durabilité à long terme des TPU. En l'absence de procédure établie pour évaluer la résistance à la fatigue dans l
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5

Mofidi, Mohammad. "Tribology of elastomers." Licentiate thesis, Luleå tekniska universitet, Maskinelement, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-18278.

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In this work, the tribological behaviour of different sealing elastomers has been studied. The influence of aging of a sealing elastomer in different lubricants on its tribological behaviour has been investigated. Tribological behaviour of sealing elastomers in dry condition and the mechanisms occurring in run-in period have been studied. Further studies pertaining to the influence of lubrication on the abrasive wear of a sealing elastomer have also been carried out.<br><p>Godkänd; 2007; 20071128 (ysko)</p>
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6

Asplund, Basse. "Biodegradable Thermoplastic Elastomers." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis Acta Universitatis Upsaliensis, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-7434.

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7

Mofidi, Mohammadreza. "Tribology of elastomers /." Luleå : Luleå University of Technology, 2007. http://epubl.ltu.se/1402-1757/2007/62/.

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8

McBride, M. C. "Modified Silicone Elastomers." Thesis, Queen's University Belfast, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.501317.

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9

Reis, Elton Aparecido Prado dos [UNESP]. "Compósitos preparados a partir de resíduo industrial de couro com elastômeros termoplásticos obtidos através de blendas de polietileno de baixa densidade e borracha natural." Universidade Estadual Paulista (UNESP), 2014. http://hdl.handle.net/11449/132840.

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Made available in DSpace on 2016-01-13T13:28:11Z (GMT). No. of bitstreams: 0 Previous issue date: 2014-08-08. Added 1 bitstream(s) on 2016-01-13T13:33:44Z : No. of bitstreams: 1 000853119.pdf: 5284349 bytes, checksum: 9ee98ca9fa72d94d257ef878b46e5398 (MD5)<br>Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)<br>O presente trabalho teve por objetivo o desenvolvimento de compósitos poliméricos através da mistura de resíduo de couro (RC), a ser utilizado como carga, com elastômeros termoplásticos obtidos por meio da compatibilização de polietileno de baixa densidade (PEBD) com borra
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10

Migwi, Charles Maina. "Thermophysical properties of elastomers." Thesis, University of Salford, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.261858.

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11

Jackson, Kevin David Oliphant. "Vibrational spectroscopy of elastomers." Thesis, University of Southampton, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.239467.

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12

Choi, Joung-Yoon. "Spectroscopic studies of elastomers." Thesis, University of Bristol, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.407012.

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13

Hakami, Ferial. "Tribology Study on Elastomers." Thesis, Curtin University, 2018. http://hdl.handle.net/20.500.11937/76048.

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A comprehensive experimental and analytical study is done on tribological behaviour of elastomers. According to the results, ascending rate of wear and friction changes with variation of operating variables and mechanical properties. New approaches are described for a better understanding of wear and friction process. Furthermore, to predict the wear rate a non-linear equation is developed by quantifying contribution of operating variables and mechanical properties. This study provides enhanced insight into elastomers wear in practice.
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14

Bayliss, Martin. "The numerical modelling of elastomers." Thesis, Cranfield University, 2003. http://hdl.handle.net/1826/87.

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This thesis reports onreview and research work carried out on the numerical analysis of elastomers. The two numerical techniques investigated for this purpose are the finite and boundary element methods. The finite element method is studied so that existing theory is used to develop a finite element code both to review the finite element method as applied to the stress analysis of elastomers and to provide a comparison of results and numerical approach with the boundary element method. The research work supported on in this thesis covers the application of the boundary element method to the s
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15

Hon, Amir Adam. "Modelling filler reinforcements in elastomers." Thesis, Queen Mary, University of London, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.420623.

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16

Corbett, D. "Statistical mechanics of photo-elastomers." Thesis, University of Cambridge, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.597994.

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Liquid Crystalline Elastomers (LCE) are unusual materials. As suggested by their name they inhabit the grey area between liquids and solids. They have many remarkable properties. This dissertation is concerned with the equilibrium statistical mechanics of dye doped LCE films. We propose a free energy to describe the destabilising effects of illumination on the underlying nematic order and combine this with the phantom chain model for the elastic free energy of elastomeric films in order to calculate the equilibrium mechanical response. We consider thin polydomain films, and describe the effect
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17

Liff, Shawna M. (Shawna Marie). "Thermomechanics of nano-filled elastomers." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/46494.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2008.<br>Includes bibliographical references.<br>The incorporation of nanoparticles into engineering thermoplastic elastomers affords engineers an opportunity to formulate flexible, tough and multifunctional polymer nanocomposites that potentially rival the most advanced materials in nature. Development of these materials is difficult since thermodynamic and kinetic barriers inhibit the dispersal of inorganic, hydrophilic nanoparticles into inherently hydrophobic polymer matrices. Thermoplastic polyurethan
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18

Bai, Shuying. "New photoactive polymers azobenzene elastomers." Thèse, Université de Sherbrooke, 2003. http://savoirs.usherbrooke.ca/handle/11143/5030.

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Azobenzene-containing elastomers have been synthesized for the first time. By free radical polymerization of methacrylate or acrylate-based monomers bearing an azobenzene moiety in solution with dissolved styrene-butadiene-styrene (SBS) triblock copolymer, azobenzene side-chain liquid crystalline polymer (SCLCP) was grafted on the rubbery polybutadiene (PB) central block of SBS. Similar to SBS, the resultant azobenzene SCLCP-grafted SBS was a thermoplastic elastomer, for which polystyrene (PS) cylindrical microdomains behave as physical cross-links. Three different azobenzene SCLCCs, differing
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19

Addy, S. W. "Radiation induced degradation of elastomers." Thesis, Sheffield Hallam University, 1987. http://shura.shu.ac.uk/19200/.

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An attempt has been made to evaluate the kinetics of the thermal and combined thermal/radiative degradation of a peroxide cured polydimethylsiloxane elastomer (PDMS), and a vinylidene fluoride-hexafluoropropylene elastomer (Viton E60-C),by chemical stress relaxation measurements. It was observed that the PDMS elastomer degraded thermally by hydrolytic scission of the main chain and chain reformation by condensation of the silanol chain end groups. However,predominant chain reformation was observed during thermal degradation studies and it was believed that this was a consequence of the reforma
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20

Liatsis, Dimitrios. "Gas induced rupture of elastomers." Thesis, Imperial College London, 1989. http://hdl.handle.net/10044/1/47540.

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21

Kumar, Nishant C. "Anionically Polymerized Supramolecular Thermoplastic Elastomers." University of Akron / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=akron1427128414.

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22

Caglar, Mert B. "Sensing behavior of magnetorheological elastomers." abstract and full text PDF (free order & download UNR users only), 2008. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1453200.

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23

Hotta, A. "Dynamics and relaxation of anisotropic elastomers." Thesis, University of Cambridge, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.604251.

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This thesis is concerned with the dynamics and mechanical relaxation properties of three types of anisotropic rubbers. The main part of the work concentrates on Liquid Crystalline Elastomers (LCE). The first type of elastomer is a monodomain LCE synthesised from a route established by Finkelmann <i>et al.</i> The second elastomer is a polydomain LCE. Finally an elastomeric block copolymer is included in the work. A range of mechanical measurements were made to explore the physical properties of the materials over a wide range of temperatures. Stress/Strain, dynamic mechanical data and thermal
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24

Jha, Vineetkumar. "Carbon black filler reinforcement of elastomers." Thesis, Queen Mary, University of London, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.510795.

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25

Patel, Sangdil Ishwarlal. "Memory effects in liquid crystalline elastomers." Thesis, University of Reading, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.394061.

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26

Ratsimba, Christian H. H. "Fatigue crack growth of filled elastomers." Thesis, Queen Mary, University of London, 2000. http://qmro.qmul.ac.uk/xmlui/handle/123456789/26243.

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In the past, the use of a fracture mechanics approach to describe crack growth in elastomers has been shown to work well for specimens of simple test geometry, simply loaded. This has been the case because elastic strain energy density (e.s.e.d.) functions could reliably be used to calculate both the magnitude of elastic stored energy available to drive a crack and the magnitude of the rate of release of such energy as the crack grows. The aim of this thesis was to investigate the applicability of such a methodology to situations of more complex loading. To this end two novel test-piece geomet
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27

Firko, Megan (Megan Rose). "Hot micro-embossing of thermoplastic elastomers." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/54461.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, September 2008.<br>"June 2008." Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 69-71).<br>Microfluidic devices have been a rapidly increasing area of study since the mid 1990s. Such devices are useful for a wide variety of biological applications and offer the possibility for large scale integration of fluidic chips, similar to that of electrical circuits. With this in mind, the future market for microfluidic devices will certainly thrive, and a means of mass production will
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28

Osborne, Mark Jonathan. "Continuum theory of smectic A elastomers." Thesis, University of Cambridge, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.620653.

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29

Likovec, Wayne Robert. "Solid state NMR studies of elastomers." Case Western Reserve University School of Graduate Studies / OhioLINK, 1995. http://rave.ohiolink.edu/etdc/view?acc_num=case1058875640.

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30

Brannum, Michelle T. "Functional Performance of Liquid Crystalline Elastomers." Case Western Reserve University School of Graduate Studies / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=case1549025445138734.

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31

Stanier, David Charles. "Multifunctional elastomers with tailored anisotropic response." Thesis, University of Bristol, 2016. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.702576.

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Traditional engineering design focusses on the load-bearing capabilities of materials, and develops functionality by adding the structure. However, hybridising with functional materials allows non-load bearing capabilities to be integrated, that simplify the design. Material anisotropy can effect this multi-functionality in complimentary ways, however its effects need to be understood. The aims of this study were to produce tailored anisotropy in elastomers, and to investigate the resulting mechanical and magnetic performance. Hence, a combination of experimental testing, and numerical & const
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32

Miller, Paul. "Sulfur Mustard penetration of thermoplastic elastomers." Fishermans Bend Vic. : Defence Science and Technology Organisation, 2008. http://nla.gov.au/nla.arc-24764.

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33

Gibson, John. "Reconfigurable Antennas Using Liquid Crystalline Elastomers." FIU Digital Commons, 2018. https://digitalcommons.fiu.edu/etd/3706.

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This dissertation demonstrates the design of reversibly self-morphing novel liquid crystalline elastomer (LCE) antennas that can dynamically change electromagnetic performance in response to temperature. This change in performance can be achieved by programming the shape change of stimuli-responsive (i.e., temperature-responsive) LCEs, and using these materials as substrates for reconfigurable antennas. Existing reconfigurable antennas rely on external circuitry such as Micro-Electro-Mechanical-Systems (MEMS) switches, pin diodes, and shape memory alloys (SMAs) to reconfigure their performance
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34

Cesana, Pierluigi. "New variational models for nematic elastomers." Doctoral thesis, SISSA, 2009. http://hdl.handle.net/20.500.11767/4235.

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Studying the microstructure of complex materials is one of the most interesting problems in modern applied mathematics and statistical mechanics. A paradigmatic case is represented by nematic liquid crystal elastomers (LCEs). Nematic liquid crystal elastomers are a class of materials which associate a liquid crystalline microstructure composed of rigid rod-like molecules (nematic mesogens) with an elastic continuum matrix made of crosslinked polymeric chains...
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35

Langenbach, Jakob. "Self-healing elastomers for soft robotics." Electronic Thesis or Diss., Université Paris sciences et lettres, 2022. http://www.theses.fr/2022UPSLS012.

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La robotique souple est une branche émergente de la robotique, qui implique l’incorporation d’élastomères. L’utilisation de matériaux auto-réparants (AR) dans les robots mous présente l’avantage de pouvoir réparer les dommages et donc de prolonger la durée de vie du robot. Dans cette thèse, des élastomères AR à base de caoutchouc naturel époxydé (ENR) ont été synthétisés, qui permettent des mouvements cycliques à 5Hz. Les dommages peuvent être réparés grâce aux liaisons hydrogène et liaisons ester échangeables, à la diffusion des chaînes pendantes et à la micro-séparation de phase. Pour la dét
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36

Le, Menn Flora-Maud. "Micromechanics of cavitation in confined soft polymer layers." Electronic Thesis or Diss., Université Paris sciences et lettres, 2022. http://www.theses.fr/2022UPSLS044.

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Chaque seconde, 29 To de données sont échangées sur Internet et plus de 90% d'entre elles transitent par fibre optique. Les fibres de verre sont protégées par plusieurs couches de résines polymères de propriétés mécaniques différentes, la vitesse de production des câbles conduit à une accumulation de contraintes internes, pouvant mener à un phénomène de cavitation dans la première couche de protection de la fibre de verre. Afin d'étudier ce phénomère, nous avons synthétisé des réseaux élastomères à base d'oligomères fonctionnalisés di-(méth)acrylates (PPG8000) et de monomères acrylates (EHA et
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37

Ju, Changkuan. "Modeling friction phenomena and elastomeric dampers in multibody dynamics analysis." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/31732.

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Thesis (Ph.D)--Aerospace Engineering, Georgia Institute of Technology, 2010.<br>Committee Chair: Bauchau, Olivier; Committee Member: Hodges, Dewey; Committee Member: Makeev, Andrew; Committee Member: Ozbay, Serkan; Committee Member: Ruzzene, Massimo. Part of the SMARTech Electronic Thesis and Dissertation Collection.
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38

Kumar, Alok. "Performance related parameters of elastomeric bearings /." Digital version accessible at:, 2000. http://wwwlib.umi.com/cr/utexas/main.

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39

Cristiano, Antonella. "Fracture by cavitation of model polyurethane elastomers." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2009. http://pastel.archives-ouvertes.fr/pastel-00578499.

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L'objectif principal de cette thèse a été de déterminer le rôle joué par l'architecture macromoléculaire du réseau sur les propriétés élastiques non linéaires, la résistance à la rupture et la résistance à la cavitation sous chargement hydrostatique. Nous avons synthétisé, dans des conditions contrôlées, trois réseaux élastomères dits « modèles » de Polyuréthanne (PU), à partir d'un triisocyanate et de polyether diols isomoléculaires (PPG). Une caractérisation physico-chimique fine des réactifs et des réseaux a été réalisée en utilisant des techniques telles que : RMN, FTIR et fractions solubl
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40

Inaler, Ekrem. "Accelerated Aging Of Elastomers In Aqueous Media." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/12608119/index.pdf.

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EPDM (Ethylene-Propylene-Diene Monomer)/PP (Polypropylene) based TPV (Thermoplastic Vulcanizate) was aged in a closed system at stabilized temperature and pressure at 80, 100 and 120oC in distilled water, detergent solution and shiner solution. The variation in properties of TPV upon aging were followed by using DSC (Differential Scanning Calorimetry), TGA (Thermogravimetric Analysis), tensile testing, Shore A rubber hardness testing. DSC analysis indicated that percent crystallinity of PP component in TPV increased at 100oC whereas crystal structure was deformed at 120oC. In addition to thi
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41

Dhokia, Vimal Gordhan. "The Cryogenic Sculptured Surface Machining of Elastomers." Thesis, University of Bath, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.507757.

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42

Tunnicliffe, Lewis Blair. "Particulate reinforcement of elastomers at small strains." Thesis, Queen Mary, University of London, 2015. http://qmro.qmul.ac.uk/xmlui/handle/123456789/9073.

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A series of particulate reinforced natural rubber composites are prepared using both model (glass sphere) and commercial (carbon black and precipitated silica) reinforcing filler materials having a range of surface activities. Small strain reinforcement and viscoelastic behaviour of the model (glass sphere-filled) microcomposites are found to be well described by hydrodynamics and temperature-insensitive stiffening mechanisms such as strain amplification and elastomer occlusion. This means that the energy applied to the model materials during small strain deformations is entirely stored and di
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43

Mahomed, Aziza. "Properties of elastomers for small-joint replacements." Thesis, University of Birmingham, 2009. http://etheses.bham.ac.uk//id/eprint/295/.

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Silicones are used to manufacture finger and wrist joints. However these joints have fractured prematurely in vivo. There is a lack of literature on the mechanical properties of silicones. The aim of this thesis was to investigate the viscoelastic and related properties of elastomers such as silicones and polyurethanes (suggested as a possible substitute for silicones in the implants) and to relate the properties to how an implant may perform in vivo. The viscoelastic properties of medical-grade silicones and Elast-Eon\(^{TM}\)3 were found to depend on frequency in compression. Above a certain
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44

Astill, David Timothy. "Synthesis and radiation stability of silicone elastomers." Thesis, Sheffield Hallam University, 1985. http://shura.shu.ac.uk/19292/.

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A wide range of polymer samples based upon polydimethylsiloxane (PDMS) have been subject to gamma irradiation, and the subsequent effects analysed using a variety of techniques. The preparation of a series of blends and block copolymers of PDMS containing small amounts of polystyrene (PS) is described, and their characterisation by spectroscopic and thermal analytical methods is discussed. A PD11S gum gave a G(X) value of 2.8 which is in good agreement with other reported values. Thermal analysis revealed a shift of 20&deg;C. in the glass transition temperature, and disappearance of the exothe
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45

Christenson, Elizabeth. "Biostability and Biocompatibility of Modified Polyurethane Elastomers." Case Western Reserve University School of Graduate Studies / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=case1118268387.

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46

SCHULZE, NAHRUP JULIA. "EVALUATION OF SILICONE ELASTOMERS FOR TABLET COATING." University of Cincinnati / OhioLINK, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1052939931.

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47

Pevnyi, Mykhailo Y. "Induced shape changes in liquid crystal elastomers." Kent State University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=kent1437989598.

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48

Brown, Katherine. "Smart elastomers for use in security applications." Thesis, University of Sheffield, 2013. http://etheses.whiterose.ac.uk/7882/.

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Smart polymers are utilised for a variety of functions. This project aimed to produce a polymer which exhibits fluorescent emission in response to tensile stimuli. Previous fluorescence studies have shown this to be theoretically possible and fluorescence spectroscopy techniques can be used to establish the existence of such responses. A wide range of elastomers (styrene butadiene rubber, polyacrylates, polyurethane acrylates and polyurethanes) have been synthesised with aliphatic polyurethane elastomers being the most promising thus far. Fluorescent labels (9-vinylanthracene, fluorescein and
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49

ALI, SYED DANISH. "BIOFILLERS FROM RENEWABLE LIGNOCELLULOSIC FEEDSTOCK FOR ELASTOMERS." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2018. http://hdl.handle.net/10281/199113.

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Le cariche rinforzanti sono i componenti principali dei compositi elastomericie vengono aggiunti per migliorarne le proprietà meccaniche. Il nero di carbonio e la silice sono i filler rinforzanti più comunemente usati nell'industria degli pneumatici a causa dei loro effetti di rinforzo. Nonostante le ottime proprietà conferite, la produzione di nerofumo proviene da combustibili fossili non rinnovabili e l’alta densità della silice rende la densità del prodotto finale piuttosto elevata e influisce negativamente sull'efficienza energetica delle automobili. Questi problemi hanno provocato una cre
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50

Cristiano-Tassi, Antonella. "Fracture by cavitation of model polyurethane elastomers." Paris 6, 2009. http://www.theses.fr/2009PA066153.

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L'objectif principal de cette thèse a été de déterminer le rôle joué par l'architecture macromoléculaire du réseau sur les propriétés élastiques non linéaires, la résistance à la rupture et la résistance à la cavitation sous chargement hydrostatique. Nous avons synthétisé, dans des conditions contrôlées, trois réseaux e��lastomères dits « modèles » de Polyuréthanne (PU), à partir d’un triisocyanate et de polyether diols isomoléculaires (PPG). Une caractérisation physico-chimique fine des réactifs et des réseaux a été réalisée en utilisant des techniques telles que : RMN, FTIR et fractions solu
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