Relevant bibliographies by topics / Blend Polymer

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  1. Dissertations / Theses

Academic literature on the topic 'Blend Polymer'

Author: Grafiati
Published: 6 September 2023

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Dissertations / Theses on the topic "Blend Polymer"

1

Williams, Peter W. "Polymer blend miscibility." Thesis, Loughborough University, 1985. https://dspace.lboro.ac.uk/2134/14459.

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A number of quasi-binary homopolymer blends have been investigated with regard to their miscibility. The blends consisted of poly(epichlorohydrin) (PEPC) mixed with a range of poly(methacrylate) polymers:- poly(methyl methacrylate); poly(ethoxyethyl methacrylate); poly(tetrahydrofurfuryl methacrylate) and poly(glycidyl methacrylate) (PGMA). It was found that the state of mixing of the systems varied with the structure of the ester side chain, embracing a number of miscibility states. It has been postulated that the observed miscibility in the system PGMA/PEPC is due to the presence of a small specific interaction between the species. A second category of blend investigated comprised of a homopolymer (PEPC) and a random copolymer. In two cases the copolymers (styreneco- methacrylonitrile; methyl methacrylate-co-methacrylonitrile) were chosen such that the cohesive energy density of PEPC lay between those of the comonomers. This led to the observation of a number of miscibility states for the systems, depending upon the copolymer composition. Analysis of these systems and similar examples in the literature was conducted using the mean-field approach. A reasonable accord between theory and experiment was found when the role of both specific interactions and free-volume terms was negligible. A third type of copolymer (glycidyl methacrylate-co-methyl methacrylate) was found to be only partially miscible with PEPC. This was due to the small GMA/PEPC interaction and the tendency of the copolymer to diverge from the copolymerisation equation at high GMA concentrations. The experimental probe for miscibility has been the glass transition temperature. This was determined using Differential Thermal Analysis, Dynamic Mechanical Thermal Analysis and to a lesser extent, Dielectric Relaxation. The phenomenon of partial miscibility, in which phase composition varies with overall blend composition, has been discussed. It has been postulated that this widely observed behaviour is due to a non-equilibrium phase separation process. The inadequacy of existing relationshi in describing the variation of the glass transition temperature of a miscible blend with composition has been highlighted. Furthermore, the importance of the transition width as an indicator of miscibility has been stressed.
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2

Liu, Yee-Chen. "Polymer blend light-emitting diodes." Thesis, University of Cambridge, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.610709.

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3

Sharudin, Rahida Wati Binti. "Carbon Dioxide Physical Foaming of Polymer Blends:-Blend Morphology and Cellular Structure-." 京都大学 (Kyoto University), 2012. http://hdl.handle.net/2433/161019.

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4

Tuladhar, Sachetan Man. "Charge transport in conjugated polymers and polymer/fullerene Blends : influence of chemical structure, morphology and blend composition." Thesis, Imperial College London, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.445260.

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5

Wang, Shiping. "THICKNESS AND CRYSTALLINITY DEPENDENT SWELLING OF POLY (ETHYLENE OXIDE) /POLY (METHYL METHACRYLATE) BLEND FILMS." University of Akron / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1556831245474707.

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6

Rajaram, Sridhar. "Quantitative image analysis and polymer blend coalescence." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1996. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ45460.pdf.

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7

Manandhar, Sandeep. "Bioresorbable Polymer Blend Scaffold for Tissue Engineering." Thesis, University of North Texas, 2011. https://digital.library.unt.edu/ark:/67531/metadc68008/.

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Tissue engineering merges the disciplines of study like cell biology, materials science, engineering and surgery to enable growth of new living tissues on scaffolding constructed from implanted polymeric materials. One of the most important aspects of tissue engineering related to material science is design of the polymer scaffolds. The polymer scaffolds needs to have some specific mechanical strength over certain period of time. In this work bioresorbable aliphatic polymers (PCL and PLLA) were blended using extrusion and solution methods. These blends were then extruded and electrospun into fibers. The fibers were then subjected to FDA standard in vitro immersion degradation tests where its mechanical strength, water absorption, weight loss were observed during the eight weeks. The results indicate that the mechanical strength and rate of degradation can be tailored by changing the ratio of PCL and PLLA in the blend. Processing influences these parameters, with the loss of mechanical strength and rate of degradation being higher in electrospun fibers compared to those extruded. A second effort in this thesis addressed the potential separation of the scaffold from the tissue (loss of apposition) due to the differences in their low strain responses. This hypothesis that using knit with low tension will have better compliance was tested and confirmed.
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8

Adhikari, Narayan Prasad. "Interfacial properties and phase behavior of unsymmetric polymer blends." [S.l. : s.n.], 2001. http://deposit.ddb.de/cgi-bin/dokserv?idn=964276852.

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9

Pipich, Vitaliy. "Ordering transition and critical phenomena in a three component polymer mixture of A/B homopolymers and a A-B diblockcopolymer." [S.l.] : [s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=97119436X.

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10

Roths, Tobias. "Rheologische Charakterisierung polymerer Materialien statistische Datenanalyse, Modellbildung und Simulation /." [S.l. : s.n.], 2000. http://deposit.ddb.de/cgi-bin/dokserv?idn=961227508.

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