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Dissertations / Theses on the topic 'Statistical copolymer'

Author: Grafiati

Published: 25 May 2024

Last updated: 19 July 2025

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1

Watson, Linda M. "Miscibility studies in statistical copolymer and terpolymer blends." Thesis, Heriot-Watt University, 1994. http://hdl.handle.net/10399/1393.

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2

Gazuz, Igor, and Jens-Uwe Sommer. "Evidence of random copolymer adsorption at fluctuating selective interfaces from Monte-Carlo simulation studies." Royal Society of Chemistry, 2014. https://tud.qucosa.de/id/qucosa%3A36400.

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We perform Monte-Carlo simulations of a binary, strongly separated mixture of A- and B-type homopolymers with some amount of random AB copolymers added. The interface is analyzed and the interface tension is calculated using the model of capillary waves. We can clearly demonstrate that random copolymers are localized at real, fluctuating interfaces between incompatible polymer species and micellization is not favored over adsorption. Our study proves that random copolymers are potential candidates for compatibilization of polymer-polymer mixtures. By simulating random copolymers in a one-compo

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3

Moghaddam, Maria Sabaye. "Statistical mechanics of the adsorption of copolymers." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/NQ63603.pdf.

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4

Lim, Florence. "Mouvements moléculaires de copolymères statistiques aux interfaces de nanoparticules de silice." Electronic Thesis or Diss., Sorbonne université, 2023. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2023SORUS286.pdf.

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Les composites à base de polymères avec des particules de silice constituent une classe importante de matériaux. Dans ces systèmes, une amélioration de certaines des propriétés mécaniques telles que le module d'élasticité par rapport à la matrice polymère pure peut se produire. La dynamique des chaînes polymères aux interfaces avec les particules inorganiques est l'un des mécanismes responsables de ce renfort comme le montrent des travaux récents sur les nanocomposites à base d'homopolymères [1]. Bien que les copolymères statistiques soient de bons candidats comme agents compatibilisants, il n

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5

Uan-Zo-li, Julie Tammy. "Morphology, Crystallization and Melting Behavior of Propylene-Ethylene Statistical Copolymers." Diss., Virginia Tech, 2005. http://hdl.handle.net/10919/29143.

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In this work the morphology, crystallization and melting behavior of novel Dow Chemical propylene-ethylene copolymers were investigated. The incorporation of ethylene units into a polypropylene chain resulted in the decrease in crystallization, melting and glass transition temperatures and overall crystallinity. Based on the shape of heat capacity curves and the dependence of the melting temperature offset on ethylene content, it was concluded that copolymers prepared using different catalyst systems exhibited different ethylene sequence length distributions. The behavior of Dow Chemical pro

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6

Yang, Yiming. "Tough Stretchable Physically-Crosslinked Hydrogel Fiber Mats from Electrospun Statistical Copolymers." University of Akron / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1473179327.

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7

Pisipati, Padmapriya. "Synthesis and Characterization of Solution and Melt Processible Poly(acrylonitrile-co-methylacrylate) statistical copolymers." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/73150.

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Polyacrylonitrile (PAN) and its copolymers are used in a wide variety of applications ranging from textiles to purification membranes, packaging material and carbon fiber precursors. High performance polyacrylonitrile copolymer fiber is the most dominant precursor for carbon fibers. Synthesis of very high molecular weight poly(acrylonitrile-co-methyl acrylate) copolymers with weight average molecular weights of at least 1.7 million g/mole were synthesized on a laboratory scale using low temperature, emulsion copolymerization in a closed pressure reactor. Single filaments were spun via hybrid

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8

Kumar, Amit. "Morphology, Crystallization and Melting Behavior of Statistical Copolymers of Propylene with Ethylene, 1-Butene, 1-Hexene and 1-Octene." Thesis, Virginia Tech, 2001. http://hdl.handle.net/10919/33563.

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In this thesis, the morphology, crystallization and melting behavior of polypropylene copolymers (propylene/ethylene, propylene/1-butene, propylene/1-hexene and propylene/1-octene) has been examined. The multiple melting behavior has been correlated with the presence of alpha and gamma phases and with the occurrence of cross-hatching morphology. The Crystallization and melting behavior of propylene/ethylene and propylne/1-butene are qualitatively similar and compatible with the expectations that the ethylene and butene comonomers are partly included in the propylene lattice. Propylene/1-hexen

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9

Twum, Eric Barimah. "Multidimensional NMR Characterization of Polyvinylidene Fluoride (PVDF) and VDF-Based Copolymers and Terpolymers." University of Akron / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=akron1367267597.

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10

Bier, Frédéric. "Conception et synthèse d’une matrice polymère thermoplastique pour l’obtention de matériaux composites recyclables, résistants au feu et utilisables dans l’industrie." Thesis, Université de Lorraine, 2018. http://www.theses.fr/2018LORR0040.

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De nouvelles matrices thermoplastiques à base de poly(méthacrylate de méthyle) (PMMA) pouvant entrer dans la composition de matériaux composites ont été synthétisées et caractérisées du point de vue de leur température de transition vitreuse (par calorimétrie différentielle à balayage) et de leur dégradation thermique (par analyse thermogravimétrique et par microcalorimétrie). La stratégie suivie était d’incorporer dans les chaînes de PMMA des unités de répétition comportant un groupement latéral phosphoré retardateur de flamme via une copolymérisation radicalaire du MMA avec un monomère phosp

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11

Mezzasalma, Leila. "A nature « copy-paste » approach for an efficient metal-free polymerization route." Thesis, Bordeaux, 2019. http://www.theses.fr/2019BORD0002.

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Le dibenzoylméthane (DBM) a été étudié comme catalyseur pour la copolymérisation par ouverture de cycle du L-lactide (LA) et du ε-caprolactone (CL) amorcée par des alcools en masse à haute température. Des copolymères présentant des structures gradient à statistique ont été formés. L’étude cinétique a mis en évidence que le DBM est un faible activateur de bout de chaîne et de monomère, l’apparente accélération de la copolymérisation étant due à la formation in situ d’acides carboxyliques catalysant la réaction à leur tour. L’acide benzoïque (BA), un acide carboxylique faible, a ensuite été étu

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12

Puech, Nicolas. "Structures et propriétés rhéologiques de réseaux transitoires chargés par des nanoparticules de silice." Phd thesis, Université Montpellier II - Sciences et Techniques du Languedoc, 2008. http://tel.archives-ouvertes.fr/tel-00353271.

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Nous avons étudié les propriétés structurales et rhéologiques de gels viscoélastiques de réseaux transitoires connectés et chargés par des nanoparticules de silice. Trois matrices viscoélastiques ont été préparées : deux microémulsions connectées possédant des gouttelettes de taille différente (30 et 100 Å) et un gel aqueux de copolymère tribloc. Les deux techniques de caractérisation employées sont la rhéologie et la diffusion de neutrons aux petits angles, ce qui nous a permis de relier les propriétés rhéologiques à la structure de ces réseaux chargés. Le facteur de renforcement rhéologique

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13

Muller, François. "Interaction et structure de copolymères neutres-chargés dissymétriques en solution aqueuse." Phd thesis, Université de la Rochelle, 2000. http://tel.archives-ouvertes.fr/tel-00001847.

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Nous avons étudié les propriétés volumiques de copolymères diblocs neutres-chargés dissymétriques. Ces molécules sont composées d'une courte partie neutre de poly(éthylène propylène) (PEP) ou de poly(tert-butyl styrène) (PtBs), et d'une longue partie chargée (polyélectrolyte) poly(styrène sulfonate) sodium (PSSNa) de taux de sulfonation supérieur à 80. Des expériences de diffusion de neutrons aux petits angles et de diffusion quasi-élastique de la lumière ont montré que ces copolymères s'auto-assemblent en solution aqueuse en micelles sphériques : coeur composé de l'auto-association des partie

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14

蔡仁佑. "Study on PMPS/PDPS Statistical Random Copolymers." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/25996361665308257118.

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碩士<br>國立臺灣大學<br>化學學系<br>86<br>Series of Polymethylphenylsiloxane (PMPS)/Polydiphenylsiloxane (PDPS) statistical random copolymers with different PDPS content were synthesized through a living anionic copolymerization from hexaphenylcyclotrisiloxane (P3) and 1,3,5-trimethyl-1,3,5-triphenylcyclotrisiloxaiie (D3Ph) in various solvent system, using n-butyllithium as initiator, and diphenylmediylchlorosilane as terminator. These copolymers were characterized by GPC and 1H-NMR. The monomer reactivity ratios of the D3Ph/P3 copolyinerization in various solvent system were estimated from Fineman-

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15

von, der Heydt Alice. "Multiphase coexistence with sequence fractionation in random block copolymers." Doctoral thesis, 2011. http://hdl.handle.net/11858/00-1735-0000-0006-B544-2.

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16

"Part I, Synthesis and characterization of fluorene-based statistical copolymers: Part II, Regiospecific synthesis of substituted [2.2]paracyclophanes." 2004. http://library.cuhk.edu.hk/record=b5892117.

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Kam-Hung Low.<br>Thesis submitted in: December 2003.<br>Thesis (M.Phil.)--Chinese University of Hong Kong, 2004.<br>Includes bibliographical references.<br>Abstracts in English and Chinese.<br>Table of contents --- p.i.<br>Acknowledgements --- p.vi.<br>Abbreviations --- p.vii.<br>Abstract --- p.viii.<br>Abstract (Chinese) --- p.x.<br>Chapter Part I --- Synthesis and Characterization of Fluorene-Based Statistical Copolymers<br>Chapter Chapter I --- Introduction --- p.1<br>Chapter 1. --- Background --- p.1<br>Chapter 2. --- rinciple of Electroluminescence --- p.2<br>Chapter 3. --- Elect

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17

Guice, Kyle B. 1982. "Synthesis & characterization of temperature- and pH- responsive nanostructures derived from block copolymers containing statistical copolymers of HEMA and DMAEMA." Thesis, 2008. http://hdl.handle.net/2152/3856.

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Hydrogels containing of 2-dimethylaminoethyl methacrylate, DMAEMA, exhibit changes in their swelling properties in response to both pH and temperature. Accordingly, these materials are useful for a variety of applications, such as tissue scaffolds, responsive lenses, separations and drug delivery. The response of DMAEMAcontaining hydrogels can be tuned by copolymerization with other monomers, such as 2-hydroxyethyl methacrylate, HEMA. We have developed methodologies for the controlled synthesis of poly(HEMAco-DMAEMA), PHD, statistical copolymers with uniform composition distributions, con

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18

Γκοτζαμάνης, Γεώργιος. "Ανάπτυξη νέων "ευφυών" κατά συστάδες συμπολυμερών τύπου ομοπολυμερές-στατιστικό συμπολυμερές". Thesis, 2007. http://nemertes.lis.upatras.gr/jspui/handle/10889/613.

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Στην παρούσα Διδακτορική Διατριβή σχεδιάστηκαν και συντέθηκαν με πολυμερισμό μέσω μεταφοράς ομάδας (group transfer polymerization, GTP) τέσσερα νέα πρότυπα “ευφυή” υδατοδιαλυτά συμπολυμερή, τα οποία αυτοοργανώνονται σε υδατικά διαλύματα σε δομές μικκυλίων ή ελαστικού φυσικού δικτύου, αποκρινόμενα άμεσα σε μεταβολές του pH, της θερμοκρασίας και της ιοντικής ισχύος του διαλύματος. Η καινοτομία των πολυμερών που συντέθηκαν οφείλεται στο γεγονός ότι σε ένα συσταδικό συμπολυμερές ενσωματώθηκε μία στατιστική συστάδα, η οποία παρουσιάζει ιδιότητες που είναι συνδυασμός των ιδιοτήτων των μονομερών που

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