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Дисертації з теми "Polystyrene copolymer"

Автор: Grafiati

Опубліковано: 3 червня 2025

Оновлено: 31 липня 2025

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1

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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2

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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3

Vrabie, Dan-Gheorghe. "Aspects of molecular orientation and relaxation of a polystyrene homopolymer, copolymer and blend." Thesis, Université Laval, 2007. http://www.theses.ulaval.ca/2007/24493/24493.pdf.

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4

Keen, Imelda dePaz. "The plasma-induced copolymerisation of polystyrene onto polypropylene-polyethylene copolymer substrates." Thesis, Queensland University of Technology, 2002.

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5

Bernard, Sophie. "Blends of a polystyrene-block-poly(ethylene oxide) copolymer and its corresponding homopolymers at the air-water interface." [Gainesville, Fla.] : University of Florida, 2006. http://purl.fcla.edu/fcla/etd/UFE0012780.

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6

LI, XINDI. "MODIFICATION OF SULFONATED SYNDIOTACTIC POLYSTYRENE AEROGELS THROUGH IONIC INTERACTIONS." University of Akron / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1525801145416997.

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7

Chijiwa, Sachiko. "Characterization of polystyrene-b-poly(acrylic acid) copolymer micelles by nuclear magnetic resonance spectroscopy." Thesis, McGill University, 2001. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=32983.

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This dissertation describes the characterization of polystyrene- b-poly(acrylic acid) (PS-b-PAA) copolymer micelles by nuclear magnetic resonance spectroscopy (NMR). The segmental chain dynamics of the polystyrene-b-poly(acrylic acid) copolymer during the micellization process was investigated by solution-state proton NMR measurements. The spin-lattice and spin-spin relaxation parameters revealed the increased motional restriction of the PS blocks of the PS-b-PAA copolymer as aggregation was induced. The mobility of the PAA segments also decreased during the micellization process. However, the

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8

Perkinson, Joy C. (Joy Clare). "The effects of polydispersity on the morphology of polystyrene-polyferrocenyldimethylsilane block copolymer thin films." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/58070.

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Анотація:

Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2009.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 35).<br>Introduction: As the size of electronic and magnetic devices decreases, nanoscale patterning becomes an increasingly important area of research. Two different approaches have been taken to pattern media: top-down methods such as lithography, and bottom-up methods such as self-assembly. Top-down assembly methods have the advantages of precision and accuracy, but are hard to scale for certain industrial

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9

Adewole, Akinlabi A. "Mixing, morphological structure and properties relationship for rubber-modified polypropylene-g-polystyrene copolymer blends." Thesis, Loughborough University, 1997. https://dspace.lboro.ac.uk/2134/32028.

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As produced reactor copolymer, obtained by in-reactor grafting polymerization technology is a two-phase rigid polymer, which combines the best attributes of semicrystalline polypropylene and those of amorphous polystyrene. In the process, the compatibilizer, PP-g-PS and the non-olefinic polymer component, PS are simultaneously generated from the monomer styrene. The reactor product which has higher modulus but lower impact resistance is further toughened by incorporation of EPR (ethylene propylene rubber) and SEBS (styrene-ethylene-butylene-styrene) triblock copolymer, via intensive melt-mixin

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10

Cai, Liang. "GRAFT COPOLYMER AEROGELS FROM SULFONATED SYNDIOTACTIC POLYSTYRENE FUNCTIONALIZED WITH A QUATERNARY PHOSPHONIUM-CONTAINING RAFT AGENT." University of Akron / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=akron1468851884.

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11

Ekinci, Olcun. "Immobilization Of Glucose Oxidase And Polyphenol Oxidase In Conducting Copolymer Of Pyrrole Functionalized Polystyrene With Pyrrole." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/2/12607373/index.pdf.

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Electrochemical polymerization of pyrrole functionalized polystyrene (PStPy) with pyrrole was carried out in water-sodium dodecyl sulfate solvent-electrolyte couple. Characterization of the resulting copolymer was performed via Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and four probe conductivity measurements. Glucose oxidase and polyphenol oxidase enzymes were immobilized in polypyrrole (PPy) and conducting copolymer of pyrrole functionalized polystyrene with pyrrole (P(PStPy-co-Py). Resulting enzyme electrodes were characterized by kinetic parameters<

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12

Bhargava, Prachur. "SELF-ASSEMBLED POLYSTYRENE-BLOCK-POLY (ETHYLENE OXIDE) (PS-b-PEO) MICELLE MORPHOLOGIES IN SOLUTION." University of Akron / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=akron1171733030.

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13

Sapkota, Dol Raj. "Single molecule tracking studies of solvent-swollen microdomains in cylinder-forming polystyrene-Poly (ethylene oxide) diblock copolymer films." Thesis, Kansas State University, 2016. http://hdl.handle.net/2097/35763.

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Master of Science<br>Department of Chemistry<br>Takashi Ito<br>Solvent swelling of block copolymer microdomains plays an essential role in the improvement of microdomain alignment by solvent vapor annealing and in chemical separations using block copolymer monoliths. Here, investigation of the effects of solvent swelling on the molecular permeability and dimensions of cylindrical microdomains in polystyrene-block-poly(ethylene oxide) (PS-b-PEO) films is done by using single molecule tracking. These films are prepared by sandwiching benzene (with/without methanol) or THF (with/without methanol)

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14

Stubbs, Ian. "Poly(styrene)-b-Poly(dimethylsiloxane)-b- Poly(styrene)/Single Walled Carbon Nanotube Nanocomposites. Synthesis of Triblock Copolymer and Nanocomposite Preparation." DigitalCommons@Robert W. Woodruff Library, Atlanta University Center, 2016. http://digitalcommons.auctr.edu/cauetds/49.

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Molecular weights of 2,000, 6,000 and 10,000 of silane functionalized atactic polystyrene (aPS) and α,ω-divinyl functionalized polydimethylsiloxane (PDMS) were prepared via living anionic polymerization and bulk anionic ring opening polymerization respectively. Functionalization of the homopolymers was confirmed by FT-IR and 1H-NMR spectroscopy and their molecular weights were determined via 1H-NMR end group analysis. A hydrosilylation reaction between the functionalized homopolymers of different molecular weights produced nine polystyrene-block-polydimethylsiloxane-block-polystyrene (aPS-b-PD

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15

Maire, Helene C. "Characterization of cylindrical nano-domains in thin films of polystyrene-poly(methyl methacrylate) diblock copolymer studied via atomic force microscopy." Diss., Manhattan, Kan. : Kansas State University, 2008. http://hdl.handle.net/2097/1037.

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16

Tallegas, Salomé. "Etude de l’auto-organisation du copolymère dibloc biosourcé hautement incompatible : Maltoheptaose-b-Polystyrène." Thesis, Université Grenoble Alpes (ComUE), 2015. http://www.theses.fr/2015GREAT026/document.

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Анотація:

Dans un contexte de miniaturisation à l’extrème des composants électroniques, les copolymères àblocs apportent une réponse technologique alternative aux procédés conventionnels destructuration des matériaux par lithographie. Parmi les défis à relever, l’obtention de systèmes decopolymères suffisamment résolus demeure un élément essentiel pour que cette technique puisseoffrir une réelle alternative pour la lithographie sub-20 nm. Nous montrons au travers del’exemple du maltoheptaose-b-polystyène (MH-b-PS) que les copolymères biosourcés ont lacapacité d’atteindre une résolution sub-10 nm grâce à

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17

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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18

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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19

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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Анотація:

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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20

Yang, Ning. "Polystyrene-based cationic copolymers : a study of their synthesis, characterization, and sizing mechanism." Diss., Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/7074.

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21

Obriot, Isabelle. "Utilisation d'un amorceur dilithien en vue de la synthèse de polystyrènes transparents de bonne résistance aux chocs." Paris 6, 1986. http://www.theses.fr/1986PA066421.

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Préparation de l'amorceur par réaction du t-BuLi, avec le ,2-bis(isopropenyl-4-phenyl)ethane. Ce monoadduct (sans oligomère et sans produit secondaire) se transforme très rapidement en diadduct. Copolymérisation butadiène-styrène (25/75 en poids). Copulation avec SiCl4 donne des polymères en étoiles.

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22

Yeates, Terence. "Synthesis and solution of polystyrene-block-polyisobutene copolymers." Thesis, University of Manchester, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.237269.

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23

Horgan, Adrian. "Polystyrene nanoparticles based on block and graft copolymers." Thesis, University of Bristol, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.343355.

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24

Dufour, Anne-Laure. "Novel superbases in the synthesis of branched polymers and copolymers." Thesis, Imperial College London, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.268769.

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25

Shah, Jignesh. "Solid phase graff copolymerization of maleic anhydride onto polyethylene and polystyrene /." free to MU campus, to others for purchase, 2003. http://wwwlib.umi.com/cr/mo/fullcit?p1418062.

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26

Magaton, Marina. "Élaboration et caractérisation de nanocomposites à base de mélanges polystyrène/polyamide 6 et d'argile montmorillonite." Thesis, Vandoeuvre-les-Nancy, INPL, 2010. http://www.theses.fr/2010INPL072N/document.

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Ce travail concerne l’élaboration de nanocomposites à base de polystyrène/polyamide 6/argile montmorillonite (PS/PA6/MMT). Son but premier a été d’évaluer l’influence d’un copolymère polystyrène greffé polyamide 6 (PS-g-PA6), en tant qu’agent compatibilisant pour promouvoir une meilleure interaction PS-PA6, et son influence dans l’intercalation/exfoliation des argiles, d’une part ; évaluer les structures et les propriétés des nanocomposites obtenus. Deux sortes d’argile montmorillonite ayant différents modificateurs organiques, bien que cinq sortes de PS-g-PA6 contenant différentes quantités d

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27

Sutherland, Aimee Celeste. "Organic-inorganic hybrid graft copolymers of polystyrene and polydimethylsiloxane." Thesis, Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/3182.

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Thesis (MSc (Chemistry and Polymer Science))--University of Stellenbosch, 2010.<br>ENGLISH ABSTRACT: Hybrid graft copolymers of polystyrene (PSty) and polydimethylsiloxane macromonomers (PDMS) were synthesised. PSty-g-PDMS was synthesised employing the grafting through technique via a conventionally free radical polymerization (FRP) using a polydimethylsiloxane macromonomer. In this series the amount of PDMS incorporated into the copolymer was varied by varying the macromonomer to styrene ratios as well as the length of the PDMS side chain. This allows for the study of the effect that th

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28

WIDAWSKI, GILLES. "Etude de l'agregation des copolymeres sequences polystyrene-polyparaphenylene." Université Louis Pasteur (Strasbourg) (1971-2008), 1993. http://www.theses.fr/1993STR13202.

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Le polyparaphenylene (ppp) est un polymere insoluble, infusible et conducteur electrique a l'etat dope. Nous avons synthetise des copolymeres a blocs polystyrene-polyparaphenylene (ps-ppp) et polymethacrylate de methyle-polyparaphenylene (pmma-ppp). Lorsque les sequences flexibles (ps ou pmma) sont assez longues ces copolymeres sont solubles et des films peuvent etre prepares par evaporation de ces solutions. Le dopage, de type n ou p, de la fraction ppp a ete realise en solution et des films de copolymeres dopes ont ete prepares. L'etude des solutions par diffusion de la lumiere, viscosimetri

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29

Bayley, Gareth Michael. "Synthesis and characterisation of organic-inorganic hybrid block copolymers of polydimethylsiloxane and polystyrene." Thesis, Link to the online version, 2007. http://hdl.handle.net/10019/711.

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30

Shar, Jabir Ali. "Adsorption study of block copolymers at solid/liquid interfaces." Thesis, University of Bristol, 1998. http://hdl.handle.net/1983/d4367232-f782-4450-b485-57b8f6bb2811.

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31

Brunacci, Antonio. "Physical aging in polymers, copolymers and blends of polystyrene derivatives." Thesis, Heriot-Watt University, 1995. http://hdl.handle.net/10399/1332.

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32

Flack, Matthew Alexander. "Novel Approaches To The Synthesis of Clicked Block Copolymers." Thesis, Virginia Tech, 2010. http://hdl.handle.net/10919/35801.

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Block copolymers are widely used in both the academic and industrial communities due to their unique properties. With the development of living polymerization techniques, the synthesis of block copolymers with controlled molecular weights and unique architectures has reached an all time high. Here a novel approach to the synthesis of block copolymers, namely polystyrene-b-polyisoprene, using azide-alkyne click chemistry techniques is investigated. Both azido and alkyne-terminated polystyrene were synthesized using ATRP. Azido-terminated polystyrene was synthesized via a substitution reacti

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33

Moment, Aaron J. "The synthesis and characterization of polystyrene liquid crystalline siloxane block copolymers." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/17484.

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Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 2000.<br>Includes bibliographical references.<br>Di block copolymers of polystyrene and side-chain liquid crystalline siloxanes have been prepared with a wide range of molecular weights (Mn total from 20,000 to 144,000) and liquid crystalline siloxane weight fractions (0.4 - 0.9). A new synthetic technique was developed to synthesize these materials, and is based on living anionic polymerization of a polystyrene-polyvinylmethysiloxane diblock copolymer followed by I the attachment of side-chain messages to th

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34

ZHONG, XING FU. "Synthese et etudes de copolymeres sequences polystyrene-poly-p-phenylene." Université Louis Pasteur (Strasbourg) (1971-2008), 1989. http://www.theses.fr/1989STR13169.

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Анотація:

Etude de la cinetique et du mecanisme de polymerisation la cyclohexadiene-1,3 amorcee par le polystyryllithium. Aromatisation par reaction avec des quinones des copolymeres sequences styrene/cyclohexadiene obtenus, donnant des copolymeres styrene/p-phenylene (spp). Depolymerisation des films de spp par chauffage pour donner des films de poly-p-phenylene. Etude de l'absorption optique, de la stabilite thermique et de la conductivite electrique des polymeres dopes

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35

Chattopadhyay, S. "Synthesis and compatibilizing effect of well defined linear and branched copolymers in heterogeneous polystyrene-rubber blends." Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 1999. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/3919.

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36

Ng, Yean Thye. "Electrically conductive melt-processed blends of polymeric conductive additives with styrenic thermoplastics." Thesis, Loughborough University, 2012. https://dspace.lboro.ac.uk/2134/11016.

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Анотація:

The growing demand in portable and compact consumer devices and appliances has resulted in the need for the miniaturisation of electronic components. These miniaturised electronic components are sensitive and susceptible to damage by voltages as low as 20V. Electrically conductive styrenic thermoplastics are widely used in electronic packaging applications to protect these sensitive electronic components against electro-static discharge (ESD) during manufacturing, assembly, storage and shipping. Such ESD applications often require the optimal volume resistance range of ≥ 1.0x105 to < 1.0x108 Ω

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37

Jindal, Aditya Jindal. "Electrospinning and Characterization of Polyisobutylene-based Thermoplastic Elastomeric Fiber Mats For Drug Release Application." University of Akron / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1512483246405986.

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38

CESAR, BERTRAND. "Synthese et caracterisation de copolymeres blocs polystyrene-b-poly(3-hexylthiophene)." Université Louis Pasteur (Strasbourg) (1971-2008), 1995. http://www.theses.fr/1995STR13227.

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Анотація:

Des copolymeres sequences polystyrene - poly(3-hexylthiophene) (ps-b-p3ht) ont ete synthetises et fractionnes. Leur caracterisation, par chromatographie d'exclusion sterique et spectroscopie uv-visible, a montre l'existence de copolymeres di et tri-blocs ainsi que d'agregats. La presence de triblocs est une donnee nouvelle concernant le mecanisme des reactions de propagation et de terminaison de la polymerisation oxydative des poly(3-alkylthiophenes). L'etude en solution, par diffusion de neutrons, de copolymeres fractionnes comportant une sequence polystyrene deuteriee a ete realisee. Elle a

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39

Zhang, Lifeng. "Crew-cut aggregates of polystyrene-b-poly(acrylic acid) diblock copolymers in solutions." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape16/PQDD_0008/NQ30429.pdf.

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40

Yu, Kui. "Multiple morphologies of polystyrene-b-poly(ethylene oxide) diblock copolymers in dilute solution." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape7/PQDD_0020/NQ56703.pdf.

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41

Yu, Kui 1967. "Multiple morphologies of polystyrene-b-poly(ethylene oxide) diblock copolymers in dilute solution." Thesis, McGill University, 1998. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=36076.

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Анотація:

Multiple morphologies of self-assembled aggregates of polystyrene- b-poly(ethylene oxide) (PS-b-PEO) diblock copolymers in dilute solution have been studied. The PS blocks are relatively long compared to the PEO blocks. The aggregates are prepared by the addition of water or methanol to the copolymer solutions in N,N-dimethylformamide (DMF), dioxane, or tetrahydrofuran (THF) to induce the aggregation of the PS blocks. Aqueous solutions of the aggregates are obtained by dialysis with water. Morphologies are directly studied by transmission electron microscopy (TEM).<br>The morphogenic effect of

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42

Zhang, Lifeng. "Crew-cut aggregates of polystyrene-b-poly (acrylic acid) diblock copolymers in solutions." Thesis, McGill University, 1996. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=34489.

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The morphological characteristics of highly crew-cut micelle-like aggregates of asymmetric polystyrene-b-poly(acrylic acid) copolymers PS-b-PAA, was studied by transmission electron microscopy and light scattering. The insoluble PS block contents in the copolymers ranged from 80 to 98 wt. %. The aggregates were formed by the water addition to the copolymer solution in N,N-dimethylformamide, and then were isolated in aqueous solutions.<br>Spherical micelles were formed when the PAA content in the copolymers was relatively higher. The PS core radii scaled as R$ sb{ rm core} sim$ N$ sb{ rm PS} sp

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43

Elmaci, Aysegul. "Thermal Characterization Of Homopolymers, Copolymers And Metal Functional Copolymers Of Vinylpyridines." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/12609892/index.pdf.

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Although, the use of vinyl pyridine polymers, especially as matrices for nanoparticle synthesis, is growing considerably, the knowledge of thermal degradation behavior is still missing in the literature. In this study, thermal degradation characteristics of the homopolymers<br>poly(4-vinylpyridine), P4VP, and poly(2-vinylpyridine), P2VP, the diblock copolymers<br>polystyrene-blockpoly( 2-vinylpyridine), (PS-b-P2VP) and polystyrene-block-poly(4-vinylpyridine), (PS-b-P4VP), and the metal functional vinyl polymers<br>cobalt-polystyrene-blockpoly( 2-vinylpyridine) and cobalt-polystyrene-block-poly

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44

McAlduff, Michael. "Solid-state NMR studies of polymer adsorption onto metal oxide surfaces." Thesis, McGill University, 2009. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=115692.

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This dissertation presents solid-state NMR studies that probe the dynamic and conformational properties of polymers adsorbed on solid surfaces in the dry state. The systems studied include a series of ethylene based random copolymers where the binding group is modified, and two diblock copolymer systems where the blocks have different intrinsic mobilities and surface interactions. The thesis begins by looking at the structures formed by the adsorption of poly (ethylene-co-acrylic acid) (PEA), poly (ethylene- co-vinyl alcohol) (EVOH), poly (ethylene-co-vinyl acetate) (EVA), and polyethylene (PE

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45

Hamie, Houssam. "Morphology and Thermal Behavior of Single Crystals of Polystyrene-Poly(ethylene oxide) Block Copolymers." Phd thesis, Université de Haute Alsace - Mulhouse, 2010. http://tel.archives-ouvertes.fr/tel-00560051.

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In the present work, we have undertaken a structural study of PS-b-PEO single crystals to elucidate the influence of the state of the PS block on crystallization from dilute solution and on subsequent thermal annealing at elevated temperature. It is noteworthy that the interest in these systems has been recently renewed in the perspective of using them as a model of grafted amorphous brushes with variable grafting density. Indeed, during crystallization of PEO, the amorphous block, i.e. PS, is rejected from the crystal accumulating on its basal surfaces. Since the crystal thickness formed duri

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46

Wood, Timothy John. "An adsorption study of vinyl alcohol/vinyl acetate copolymers on polystyrene by quartz microbalance." Thesis, University of Bristol, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.261278.

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47

Jouenne, Stephane. "Structuration et renforcement du polystyrene par des copolymeres styrene/butadiene a gradient de composition." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2005. http://tel.archives-ouvertes.fr/tel-00012106.

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Cette étude porte sur le renforcement du polystyrène qui a un comportement fragile à température ambiante. Le mélange avec un copolymère styrène/butadiène à gradient de composition permet d'obtenir un matériau nanostructuré plus tenace, qui conserve sa transparence. Ces copolymères de type polystyrène-b-(polybutadiène-grad-polystyrène)-b-polystyrène (noté S1-(B/S)grad-S2) sont synthétisés en deux étapes par voie anionique. L'asymétrie entre les blocs S1 et S2 et le gradient de composition ont une influence déterminante sur la structuration et les propriétés, en pur ou en mélange. Des synthèses

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48

Feng, Daan. "Structure-property behavior of free radical synthesized polydimethylsiloxane-polystyrene block polymers and polytetramethyleneoxide based ionene elastomers." Diss., Virginia Polytechnic Institute and State University, 1989. http://hdl.handle.net/10919/54525.

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Structure-property behavior of free radical synthesized polydimethylsiloxane (PDMS) - polystyrene and PDMS-styrene derivative block polymers have been studied. The block polymers were provided by Dr. J. V. Crivello from GE. Two different types of segmented polytetramethyleneoxide (PTMO) based ionene elastomers were also investigated. The PTMO-dihalide ionenes were obtained through the courtesy of Dr. C. M. Leir in 3M, while the PTMO-dipyridinium ionenes were synthesized by Dr. B. Lee in Prof. McGrath’s research group at VPI&SU. In the free radical synthesized PDMS-PS block polymers, the molec

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49

Bousquet, Antoine. "Nouvelles stratégies d'élaboration contrôlée de surfaces polymères." Thesis, Bordeaux 1, 2008. http://www.theses.fr/2008BOR13733/document.

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Nous avons étudié l'utilisation du phénomène de ségrégation de surface afin de fonctionnaliser des matériaux polystyrène (PS). L'incorporation d'un additif copolymère à blocs est réalisée dans une matrice d'homopolymère de polystyrène sous forme de film ou de particule. Quand les mélanges sont recuits dans un environnement humide le copolymère amphiphile migre à la surface pour réduire la tension de surface du matériau. Nous avons synthétisé au laboratoire trois copolymères à blocs de nature chimique différente: le PS-b-PAA (polyacide acrylique), le PS-b-PGA (polyacide glutamique) et le PS-b-P

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50

Lessard, Benoît H. 1985. "Random controlled free radical copolymerization of acrylic acidstyrene and tert-butyl acrylatestyrene mixtures using nitroxide mediators." Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=111944.

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Controlled free radical polymerization facilitates the production of polymers with highly defined microstructures like traditional ionic polymerization; but in contrast allows for previously unattainable monomer combinations such as acrylic acid in its non-protected form. Incorporation of acrylic acid into styrene was done by random copolymerization of acrylic acid (directly and in its protected form as tert-butyl acrylate) with styrene. Styrene/tert-butyl acrylate (S/t-BuA) as well as styrene/acrylic acid (S/AA) mixtures were copolymerized to form tapered or gradient copolymers. Using an alko

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