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Dissertations / Theses on the topic 'Polystyrene'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Simard, Yan. "Thermolysis of polystyrene." Thesis, McGill University, 1994. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=68051.

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Styrene was recovered from polystyrene (molecular weight of 138 000) by thermolysis in a nitrogen atmosphere at temperatures between 368$ sp circ$C and 407$ sp circ$C. The results were independent of the initial weight of polystyrene which was varied between 30 and 480 grams. Up to 70% of the polystyrene was converted to styrene. The styrene yield increased with temperature. At higher temperatures, the residue left in the reactor consisted mainly of styrene monomer, dimer and trimer (MW of 190). The maximum rate constant of volatile production was found to fit a first order model. The activati

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2

Califano, Rosa. "Functionalized Syndiotactic Polystyrene." Doctoral thesis, Universita degli studi di Salerno, 2012. http://hdl.handle.net/10556/306.

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2010 - 2011<br>La sintesi di materiali polimerici da metodo di modificazione, per ottenere le proprietà desiderate in polimeri, è un argomento importante in chimica dei polimeri e tecnologia. Molto spesso, proprietà desiderate non sono raggiungibili dalle proprietà di un omopolimero singolo. Una strategia comunemente utilizzato per raggiungere questo scopo è l'ancoraggio di gruppi funzionali specifici lungo le catene polimeriche In questo contesto che l'interesse nella funzionalizzazione di polistirene sindiotattico (s-PS) sorge, uno semi-cristallina polimero termoplastico che dispone di bas

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3

PIEL, SYLVIE. "Relations structure-proprietes de copolymeres triblocs polystyrene bloc-polyisoprene bloc-polystyrene." Paris 6, 1993. http://www.theses.fr/1993PA066446.

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Plusieurs copolymeres triblocs polystyrene bloc polyisoprene bloc polystyrene, sis, ont ete soumis a l'examen des relations structures chimiques et microscopiques proprietes physiques et mecaniques. La viscosite des solutions des sis dissous dans du toluene suit une loi fonction de ne#c#c#e, nombre de nuds equivalents developpes par la chaine totale, dans le milieu. Cette loi est en ne#c#c#e#3#,#4, tant que le milieu reste concentre et enchevetre. Pour les analyses en mecanique dynamique mesurees entre 100c et +200c, nous avons montre l'importance du role joue par la longueur de chacun des blo

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4

Mailhot-Jensen, Bénédicte. "Etude des mécanismes de photooxydation du polystyrène, du polyacrylonitrile et du polystyrene-co-acrylonitrile." Clermont-Ferrand 2, 1993. http://www.theses.fr/1993CLF21502.

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Les comportements photochimiques du polystyrène, du polyacrylonitrile et du poly(styrene-co-acrylonitrile), sous irradiations a courte longueur d'onde (egale a 254 nm) et a grandes longueurs d'onde (superieures ou egales a 300 nm), ont été étudiés. Différentes techniques d'identification des photoproduits formes lors de l'irradiation des polymères sous forme de films solides ont été utilisées: spectroscopies irtf et uv-visible, chromatographie hplc. D'autres méthodes, permettant de transformer spécifiquement les photoproduits, ont été associées a ces techniques analytiques: traitements chimiqu

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5

Dehonor, Gomez Mariamme. "Polystyrene grafting of CNx nanotubes for the elaboration of polystyrene-based nanocomposites." Lyon, INSA, 2007. http://theses.insa-lyon.fr/publication/2007ISAL0033/these.pdf.

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This thesis is concerned to the development of novel engineered surface materials using nitrogen-doped carbon nanotubes (CNx) that were grafted with polystyrene (PS) chains using in situ radical polymerization controlled by nitroxides. The in situ polymerization method involved two main steps, the radical attachment of a system initiator-controller that could follow a Nitroxide Mediated Radical Polymerization (NMRP) in solution. The chemically modified carbon nanotubes were used in the preparation of polymer-nanotube composites with the aim of improving the dispersion of nanotubes within the m

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6

Dehonor, Gomez Mariamme Terrones Maldonado Mauricio Gauthier Catherine Gonzalez Montiel Alfonso. "Polystyrene grafting of CNx nanotubes for the elaboration of polystyrene-based nanocomposites." Villeurbanne : Doc'INSA, 2008. http://docinsa.insa-lyon.fr/these/pont.php?id=dehonor_gomez.

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7

Varadi, Jasline Deepthi Das. "Scratch Behavior of Polystyrene." University of Akron / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=akron1259183439.

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8

Wingert, Maxwell. "Carbon dioxide foaming and High-pressure rheology of polystyrene and polystyrene/organoclay nanocomposites." The Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=osu1167770881.

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9

Dohnalová, Tea. "Skleněný pastýř." Master's thesis, Vysoké učení technické v Brně. Fakulta výtvarných umění, 2019. http://www.nusl.cz/ntk/nusl-396117.

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The topic of my thesis are menhirs. Specifically, the largest Czech menhir known as the Stone Shepherd (3200 cm). The aim of this work was to transfer the exact shape and size of this megalith and materialize it here in Brno. This goal required the use of many procedures. At the beginning there was a photo shoot, then a 3D program, 3D program editing, and slicing into contour lines. Then I projected the menhir on a wall in real size and traced it to polystyrene boards. The next step was to cut out all 104 plates on a band saw and I could go to gluing and folding the whole object. The final ste

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10

Pukančíková, Andrea. "Praktické aspekty blokové polymerace styrenu." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2010. http://www.nusl.cz/ntk/nusl-216622.

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The diploma thesis deals with radical bulk polymerization of styrene. Recent knowledges about mono- and multifunctional initiators of radical polymerization and coordination polymerization of styrene with metalocene initiators are summarized in theoretical part. Experimental part of diploma thesis is focused on relationship between polymerization conditions and conversion, molecular mass and distribution of molecular mass. Experiments carried out with monofunctional initiators (dibenzoylperoxide, dilauroylperoxide, tert-butylperbenzoate) and with bifunctional initiators (Luperox 101 and Lupero

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11

Zhang, Huan. "Properties and Structures of Sulfonated Syndiotactic Polystyrene Aerogel and Syndiotactic Polystyrene/Silica Hybrid Aerogel." University of Akron / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=akron1405298489.

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12

Yeniova, Canan Esma. "Impact Modified Polystyrene Based Nanocomposites." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/3/12610306/index.pdf.

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Polystyrene, PS, is a preferable polymer in industry, but, its brittle characteristic restricts its utilization. The aim of this study is to improve the impact strength of PS by the help of elastomeric materials SEBS-g-MA and E-BA-GMA. In order to prevent the reduction in the tensile strength of the materials, three different types of organic montmorillonites, MMT, (Cloisite&reg<br>30B, 25A and 15A) were used as fillers. Nanocomposite preparation was performed in a co-rotating twin screw extruder. Initially elastomer and organoclay contents were kept at 5wt% and 1-2wt% respectively. Well dis

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13

Collis, M. W. "Microscale processing of polystyrene melts." Thesis, University of Cambridge, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.597878.

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This thesis examines the processing behaviour of molten polystyrenes with different molecular weights and architectures, using experimental results obtained from a micro-scale processing apparatus and numerical simulations applying both empirical and molecular-based constitutive models. Processing experiments were performed using a multi-pass rheometer, a two piston capillary-type machine which principally employed a contraction then expansion slit geometry. This was able to provide flow-induced birefringence and pressure difference data at a range of flow rates from ten gram sample quantities

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14

Lewis, D. "Enzyme adsorption to polystyrene latex." Thesis, University of Strathclyde, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.382347.

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15

Tremlett, Clare J. "The surface modification of polystyrene." Thesis, Loughborough University, 2000. https://dspace.lboro.ac.uk/2134/10522.

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Polymers have ideal bulk properties for many applications. However, adhesion to many polymers is poor without surface pretreatment. This can result, for example, in peeling paint and printing, adhesive joint failure and bio-incompatibility. In applications such as painting, printing, adhesive bonding and biocompatibility, various cleaning or surface chemical modifications may be employed. A commodity polymer where pretreatment IS sometimes needed is polystyrene. This project investigated, in detail, the effects of a novel method of modification namely mediated electrochemical oxidation (MEO),

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16

Merche, Delphine. "Synthèse et caractérisation de couches de polystyrène et de polystyrène sulfoné obtenues par polymérisation-plasma à pression (sub)-atmosphérique." Doctoral thesis, Universite Libre de Bruxelles, 2011. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209871.

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Lors de ce travail, de fins films de polystyrène ont été déposés dans la post-décharge d’une torche plasma atmosphérique commerciale, mais aussi dans la décharge d’une DBD (Décharge à Barrière Diélectrique), conçue et développée par nos soins au laboratoire. Une DBD est un procédé permettant d’obtenir des plasmas froids à pression atmosphérique. <p><p>Nos résultats ont montré que la DBD permettait d’obtenir des films de polystyrène de meilleure qualité (degré d’oxydation moindre…) qu’avec la torche commerciale en raison de l’atmosphère contrôlée de l’enceinte DBD. Les films sont déposés en pré

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17

Dike, Ali Sinan. "Nanocomposites Based On Blends Of Polystyrene." Phd thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613296/index.pdf.

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Due to brittleness of polystyrene, PS, its usage area is restricted. To solve this problem and expand the usage area of PS, it can be blended and impact modified with an elastomeric material. In this study, the decrease in the modulus and tensile strength imparted by impact modification was overcome by reinforcing this mixture by incorporating organoclays and producing nanocomposites. This study consists of two parts. In the first part of this study three different types of aliphatic elastomeric materials and three different types of organoclays were used and their effects on the morphology,

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18

Demarquette, Nicole Raymonde. "Nonlinear viscoelastic properties of polystyrene solutions." Thesis, McGill University, 1990. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=60004.

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In this work the nonlinear behavior of concentrated polystyrene solution was examined using sliding plate rheometer developed at McGill University. In this rheometer a novel transducer is used to measure the shear stress and an optical system is used to measure birefringence during flows involving high shear rates.<br>The steady shear stress was found to be independent of shear rate at high shear rates. The Cox-Merz rule was found to be valid for concentrations less than 0.199 g.cm$ sp{-3}$, but a deviation from the rule was observed for higher concentrations. Sigmoidal damping functions, base

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19

Pedley, Anne Margaret. "Solution properties of sulphonated polystyrene ionomers." Thesis, Imperial College London, 1990. http://hdl.handle.net/10044/1/46498.

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20

Watts, Paul CristoÌir Patrick. "Electrically conducting carbon nanotube polystyrene composites." Thesis, University of Sussex, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.288865.

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21

Moyses, Stephane. "Morphology and structure of syndiotactic polystyrene." Thesis, Sheffield Hallam University, 1997. http://shura.shu.ac.uk/20096/.

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The delta-phase of the syndiotactic polystyrene/ethylbenzene system, as formed by crystallisation from dilute solution, is shown to result in a lamellar morphology, with a monoclinic crystal lattice similar to that already reported for the complex with toluene. The temperature/concentration phase diagram for sPS/ethylbenzene gels was obtained using DSC. This shows the presence of three polymer/solvent compounds, one of which contains 0.25 solvent molecules per monomer unit. For this latter compound, the stoichiometry corresponds to that proposed by Chatani et al. for the delta-phase of sPS in

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22

Alekseeva, О. V., N. A. Bagrovskaya, and A. V. Noskov. "Polystyrene Film Composites Filled with Fullerenes." Thesis, Sumy State University, 2013. http://essuir.sumdu.edu.ua/handle/123456789/35444.

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It is shown by methods of electronic microscopy that polystyrene film forms during evaporation of sol-vent from a solution of polystyrene in o-xylene. This film consists of polystyrene molecules integrated in aggregates. According to IR-spectroscopy data it was suggested that noncovalent interaction of phenyl ring with fullerene molecule occurs in the composite material. The studied films possess antimicrobial proper-ties. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/35444

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23

Ndoro, Tinashe V. M. "Simulation of a Polystyrene Silica Nanocomposite." Phd thesis, TUPRINTS, 2011. https://tuprints.ulb.tu-darmstadt.de/2830/1/Ndoro_Tinashe_-_Thesis_2011.pdf.

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Structural and Dynamical Properties of Atactic Polystyrene in the Interface and Interphase Region Surrounding Grafted and Ungrafted Silica Nanoparticles The composite industry has long achieved enhanced material properties by mixing micro sized inorganic filler particles with a polymer matrix1,2. This is because the combination of two or more different materials can have a synergistic effect on the overall composite material properties imparting advantages that are absent in the individual constituents. A well-known example is that of adding carbon black as reinforcing material to increase

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24

Huang, Chongwen. "Rheology of Oligomeric Sulfonated Polystyrene Ionomers." University of Akron / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=akron1471281020.

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25

侯斯健 and Sijian Hou. "Syntheses and functionalization of block copolymers based on polystyrene-block-poly(4-vinylpyridine) and polystyrene-block-polyisoprene." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1999. http://hub.hku.hk/bib/B31240331.

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26

Hou, Sijian. "Syntheses and functionalization of block copolymers based on polystyrene-block-poly(4-vinylpyridine) and polystyrene-block-polyisoprene /." Hong Kong : University of Hong Kong, 1999. http://sunzi.lib.hku.hk/hkuto/record.jsp?B2168733X.

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27

Ariza, Nathan Robert Ariza. "An Investigation on Compressive Mechanical Properties of Syndiotactic Polystyrene Gels and the Conductive Behavior of Syndiotactic Polystyrene Ionogels." University of Akron / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1541783363046921.

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28

Chan, Ngo-Hin. "Relaxation of polystyrene rubbed at low temperature /." View abstract or full-text, 2005. http://library.ust.hk/cgi/db/thesis.pl?PHYS%202005%20CHAN.

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29

Ozden, Gulsum. "Synthesis And Characterization Of Polystyrene Clay Nanocomposites." Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/12605132/index.pdf.

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This study was undertaken to prepare polystyrene (PS)/montmorillonite (MMT) nanocomposites by different methods, including melt intercalation, in-situ polymerization and masterbatch methods. The in-situ polymerization method consisted of dispersing the styrene monomer into the galleries of MMT followed by subsequent polymerization. The PS/MMT nanocomposites formed by melt intercalation method were prepared on a twin-screw extruder. The masterbatch method was in fact a two-step process. As the first step, a high clay content composite of polystyrene (masterbatch) was prepared by in-situ polymer

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30

St, Lawrence Sterling. "Crystallisation and mechanical properties of syndiotactic polystyrene." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0003/NQ42570.pdf.

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31

Roth, Connie B. "Hole formation in freely-standing polystyrene films." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape9/PQDD_0004/MQ43214.pdf.

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32

Brues, Michael J. (Michael Jason). "Thermolysis of mixtures of polyethylene and polystyrene." Thesis, McGill University, 1994. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=22642.

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The thermolysis of mixtures of polyethylene and polystyrene was investigated. Overall liquid production for the mixture was above the values predicted from individual polymer reactions. No detrimental effects on the styrene production were evident, as over 50% of the initial polystyrene charge was converted to styrene for polystyrene and for mixtures. There were, however, some differences in the secondary products. No incorporation of one polymer onto another was observed, either in the liquid or the residue.<br>Different reaction conditions were examined. It was determined that using a single

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33

Khougaz, Karine. "Characterization of polystyrene based diblock copolymer micelles." Thesis, McGill University, 1995. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=40163.

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The micellization of polystyrene based block copolymers was investigated in aqueous and in organic media. Micelles formed from polystyrene-b-poly(sodium acrylate) (PS-b-PANa) in sodium chloride solutions were investigated by static light scattering (SLS). The aggregation numbers (N$ rm sb{agg})$ were influenced by low salt concentrations ($<$0.10 M) and they were essentially independent of the soluble block lengths. The core radii ($ rm sb{e}$ agreed well with previous solid state results on similar samples studied by small-angle X-ray scattering (SAXS). It was thus concluded that no supermice

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34

Lageraaen, Paul R. (Paul Robert). "Thermolysis of mixtures of polyethylene and polystyrene." Thesis, McGill University, 1993. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=56791.

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Thermolysis of mixtures of linear low density polyethylene, LLDPE, and polystyrene, PS, was investigated. Mixtures having various polyethylene/polystyrene ratios were reacted in a stirred, batch reactor under a nitrogen atmosphere at moderate temperatures, ranging between 350 and 420$ sp circ$C. The major products collected included a volatile product, which was liquid at room temperature, and a wax-like residue. The liquid products were consistently found to contain over 90 percent styrene and toluene with the yield of styrene decreasing as the percentage of polyethylene in the mixture increa

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35

Evans, Angus Martin. "Structure, morphology and crystallisation of syndiotactic polystyrene." Thesis, Queen Mary, University of London, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.286595.

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36

Bernardo, Carlos Gabriel Pires Morgado. "Solubility of organic liquids in polystyrene matrices." Thesis, University of Oxford, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.419261.

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37

Ross, Elaine. "Polystyrene-polyisoprene blends : a spin-label study." Thesis, University of Aberdeen, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240342.

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Polystyrene (PS) carrying a terminal nitroxide group was synthesised by anionic polymerisation. The ESR spectra of the PS in bulk and in blends with polyisoprene (PIP) recorded over a range of temperatures indicate that the motional freedom of a proportion of the labelled PS chain ends is enhanced by the presence of PIP especially at elevated temperatures (above ca. 400K). The possibility that this effect is due to a trend towards macroscopic miscibility between the two homopolymers at temperatures in the region of 400K is ruled out by a range of experiments including differential scanning cal

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38

Lascelles, Stuart Francis. "Conducting polymer-coated micrometer-sized polystyrene latexes." Thesis, University of Sussex, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.362215.

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39

Callister, Stephen J. "The thermoreversible gelation of atactic polystyrene solutions." Thesis, University of Bristol, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.303740.

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40

Correa, Carlos Alberto Flavio. "Structure-properties relationships in rubber toughened polystyrene." Thesis, Cranfield University, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.358206.

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41

Reeve, Toby Benjamin. "Diol-functionalised polystyrene resins : synthesis and applications." Thesis, University of Leicester, 2004. http://hdl.handle.net/2381/30088.

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Chapter 1 introduces the motivation behind and the methods for the use of insoluble polymers for the heterogenisation of well-defined homogenous catalysts. The use of diol ligands and polymer-supported catalysts in the Diels-Alder reaction and dialkylzinc addition to aldehydes is also reviewed. Finally, the aims of this work are outlined. Chapter 2 evaluates various routes for the synthesis of diol-functionalised resins. The grafting of triol compounds to preformed chloromethylated resins was undertaken through formation of an ether linkage, leaving a pendant diol. Emphasis was placed on incor

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42

Noskov, А. V., О. V. Alekseeva, А. S. Kraev, and А. V. Agafonov. "Dielectric Parameters of Polystyrene / Fullerene Composite Films." Thesis, Sumy State University, 2013. http://essuir.sumdu.edu.ua/handle/123456789/35431.

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The paper describes the frequency dependences of the electrophysical parameters (capacitance, dielectric constant, dielectric loss tangent, and resistivity) of polystyrene films filled with small additions of fullerenes (up to 1 wt % of C60). The composite materials obtained were concluded to be nonpolar. The dielectric constant as a function of the film composition passes through a minimum at 0.035 wt of C60. The polymer maintains good insulating properties when filled with fullerenes. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/354

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43

Grewell, David A. "Laser Microwelding of Polystyrene and and Polycarbonate." The Ohio State University, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=osu1396276070.

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44

Tsagli, Kelvin Xorla. "Temperature Dependence of Photoluminescence Spectra in Polystyrene." University of Akron / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=akron1625744248503334.

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45

Ng, Ting-Ting. "Surface modification of, and adhesion to, polystyrene." Thesis, Loughborough University, 2006. https://dspace.lboro.ac.uk/2134/34260.

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Polystyrene (PS) is a non-polar polymer that has limited surface properties since it lacks polar functional groups. In this project, different polar functional groups were incorporated onto PS by various methods such as surface treatments (flame treated and chromic acid treated), non-reactive and reactive compounding (at different loadings of copolymers) and grafting of copolymer chains induced by UV irradiation. These functional groups, namely carboxylic acid, hydroxyl, styrene maleic anhydride (compounded and grafted) and poly(vinyl methyl ether) (PVME), introduced during treatment and modif

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46

Perevosnik, Kathleen A. "Investigation of the Mechanical and Thermal Properties of Poly(styrene-block-isobutylene-styrene) (SIBS) and its Blends with Thymine-Functionalized Polystyrene." Akron, OH : University of Akron, 2008. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=akron1226647131.

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Thesis (M.S.)--University of Akron, Dept. of Polymer Science, 2008.<br>"December, 2008." Title from electronic thesis title page (viewed 01/13/2010) Advisor, Judit E. Puskas; Faculty Reader, Gary R. Hamed; Department Chair, Ali Dhinojwala; Dean of the College, Stephen Z. D. Cheng; Dean of the Graduate School, George R. Newkome. Includes bibliographical references.

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47

Eda, Goki. "Effects of solution rheology on electrospinning of polystyrene." Link to electronic thesis, 2006. http://www.wpi.edu/Pubs/ETD/Available/etd-042706-135317/.

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48

Wong, Tsun Wah. "A study on mechanical properties of high density polyethylene/polystyrene/SBES [i.e. SEBS] polymer blends." access abstract and table of contents access full-text, 2001. http://libweb.cityu.edu.hk/cgi-bin/ezdb/dissert.pl?msc-ap-b21175202a.pdf.

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Thesis (M.Sc.)--City University of Hong Kong, 2001.<br>"A dissertation submitted in part-fulfilment of the requirements for the degree of Master of Science of City University of Hong Kong." Title from title screen (viewed on Sept. 4, 2006) Includes bibliographical references.

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49

Loggi, Louis T. "An experimental characterization of the tensile behavior of polystyrene /." Online version of thesis, 1988. http://hdl.handle.net/1850/10217.

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50

Lazzara, Thomas Dominic. "Self-assembled styrene based alternating copolymer nanotubes : modeling and experiment." Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=112531.

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The structure and association behaviour of poly(styrene-alt-maleic anhydride) (SMA) and poly(styrene-alt-N,N-dimethylpropylamide) (SMI) polymers were studied using molecular modeling. The conformational studies were carried out at a semi-empirical PM3 level. SMA and SMI polymers were found to associate into nanotubes. These nanotubes have primary, secondary and tertiary structures. The primary structure is the conformation the polymer takes depending on the degree of protonation and its chirality. The secondary structure is the association of many polymers to form a nanotube structure. The ter

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