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Dissertations / Theses on the topic 'Polymer blends'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Muangpil, Sairoong. "Functionalised polymers and nanoparticle/polymer blends." Thesis, University of Bristol, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.654111.

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The incorporation of nanoparticles into polydimethylsiloxane polymers either in the form of physical blending or chemical crosslinking has long been studied as it can improve the properties of composite materials. Interactions between the host polymer and the filler particle, filler concentration and conformation of each component are the key factors that influence these properties. Understanding the effect of these factors is of fundamental importance in all practical applications of composite materials. This thesis describes the study of a range of PDMS composites by using a variety of exper

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2

Singh, V. B. "Polyethersulphone polymer blends." Thesis, Imperial College London, 1985. http://hdl.handle.net/10044/1/37855.

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3

Masson, Jean-François. "Cellulosesynthetic-polymer blends." Thesis, McGill University, 1990. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=74661.

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Blends of cellulose (CELL) with polyvinyl pyrrolidone (PVP), poly(4-vinyl pyridine) (P$ sb4$VPy), polyvinyl alcohol (PVA), polyacrylonitrile (PAN), poly($ epsilon$-caprolactone) (PCL), and nylon 6 (Ny6), and of chitosan with PVA were investigated in an attempt to gain some insight into the factors that affect the miscibility of cellulose with synthetic polymers. The miscibility and the scale of mixing of the various blends were studied by differential scanning calorimetry, dynamic mechanical analysis, infrared and NMR spectroscopy, and proton spin-lattice relaxation measurements. The CELL/PVP,

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4

Manda, Dimitra. "Thermodynamics of polymer blends." Thesis, Imperial College London, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.300415.

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5

Bhutto, Ali Asghar. "Miscibility of polymer blends." Thesis, Brunel University, 1999. http://bura.brunel.ac.uk/handle/2438/7392.

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In this work an attempt is made to correlate polymer miscibility with diffusion and with molecular interactions. A system with lower critical solubility temperature has been selected, namely polystyrene (PS) and polyvinyl methyl ether (PVME). Most of the published work has been done on polymers in solutions or on solvent cast specimens and therefore on ternary systems. The role of solvent has not yet been fully evaluated and it was of interest to compare the results on solvent cast samples with those prepared by mechanical blending and by diffusion. Molecular interaction is dependent on functi

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6

Mattsson, Sandra. "Microscopy techniques for studying polymer-polymer blends." Thesis, Umeå universitet, Institutionen för fysik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-157990.

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Semiconductors are used in many electronic applications, for example diodes, solar cells and transistors. Typically, semiconductors are inorganic materials, such as silicon and gallium arsenide, but lately more research and development has been devoted to organic semiconductors, for example semiconducting polymers. One of the reasons is that polymers can be customized, to a greater extent than inorganic semiconductors, to create a material with desired properties. Often, two polymers are blended to obtain the desired function, but two polymers do not usually result in an even blend. Instead th

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7

Julien, Grégoire. "Dynamics in polymer blends and polymer-solvent blends close to the glass transition." Thesis, Lyon 1, 2014. http://www.theses.fr/2014LYO10187/document.

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Dans ce travail, nous proposons un modèle qui décrit la dynamique dans les mélanges de polymères et polymère-solvant à l'approche de la transition vitreuse. Le modèle est résolu sur un réseau 2D sur des échelles de 10 nm à plusieurs microns. Ce modèle incorpore l'aspect hétérogène de la dynamique à l'échelle d'une hétérogénéité dynamique (3-5 nm). Dans le cas des mélanges de polymères, nous appliquons ce modèle afin d'étudier la séparation de phase lorsque le système est refroidi proche ou sous Tg, et le rajeunissement lorsque le système est réchauffé dans un état miscible et fondu. Pendant la

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8

Guo, Molin. "PROCESSING-STRUCTURE-PROPERTY RELATIONSHIPS INCO-CONTINUOUS POLYMER BLENDS AND COMPOSITES." Case Western Reserve University School of Graduate Studies / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=case1593786851492932.

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9

Huynh, Anh Nhut Materials Science &amp Engineering Faculty of Science UNSW. "Rubber-polymer blends: a thesis in polymer engineering." Awarded by:University of New South Wales. Materials Science & Engineering, 2007. http://handle.unsw.edu.au/1959.4/40833.

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This study examines composite materials prepared from ground recycled tires (tire crumb) and post-consumer recycled high density polyethylene (HDPE). An initial set of composites was prepared from as-received tire crumb and HDPE recyclate containing 040% tire crumb in 10% increments, using injection moulding. The elastic modulus and tensile strength were found to decrease linearly with increasing tire crumb content. Addition of tire crumb to recycled HDPE caused produced an immediate reduction in the strain to failure with a progressively more modest decrease as the tire crumb content was incr

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10

Milner, V. A. "Miscibility predictions in polymer blends." Thesis, Lancaster University, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.332385.

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11

Clark, Jane Northen. "Intermolecular interactions in polymer blends." Thesis, Imperial College London, 1990. http://hdl.handle.net/10044/1/47811.

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12

Gamini, Seneviratne Weerasekara Mudiyanselage. "Phase separation of polymer blends." Thesis, University of Sussex, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.293398.

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13

Jackson, Stuart Thomas. "Surface analysis of polymer blends." Thesis, University of Sheffield, 1993. http://etheses.whiterose.ac.uk/14740/.

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14

Lee, Minhee. "Extrusion of polymers and polymer blends with supercritical carbon dioxide." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/NQ51208.pdf.

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15

Guo, Yuelei. "INVESTIGATION OF SILICONE RUBBER BLENDS AND THEIR SHAPE MEMORY PROPERTIES." University of Akron / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1525982588046477.

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16

Jones, R. A. L. "Mutual diffusion in miscible polymer blends." Thesis, University of Cambridge, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.233254.

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Recent theories have suggested that mutual diffusion between miscible polymers may be strongly influenced by the unusual thermodynamics of mixing of high polymers; in addition the mobility properties of polymer blends are not, in general well understood. This dissertation describes experiments to investigate how these factors influence mutual diffusion in miscible polymer blends. After a general introduction and a review of some recent theories of mutual diffusion in polymer blends, experiments are described in one miscible blend system, Polyvinyl Chloride (PVC)/Polycaprolactone (PCL);x-ray mi

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17

El-Begawy, Salah El-Din Moustafa. "Miscibility in polymer blends during copolymerization." Thesis, University of Salford, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.305127.

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18

Morley, Kevin P. "Criteria of failure for polymer blends." Thesis, Manchester Metropolitan University, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.303218.

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19

Webb, W. D. "Gas transport in miscible polymer blends." Thesis, Imperial College London, 1985. http://hdl.handle.net/10044/1/37890.

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20

Słota-Newson, Joanne Elizabeth. "Diblock compatibilizers in optoelectronic polymer blends." Thesis, University of Cambridge, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.610183.

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21

Deb, Nabankur. "Morphological studies in polymer-fullerene blends." Diss., Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/54381.

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Polymer-fullerene blend systems have found relevance and application in a number of fields including organic photovoltaic devices. While synthesizing new materials with desirable electronic properties is essential to designing better photovoltaic devices, it is equally important to understand the complex phase morphology of these blends and its effect on device performance. Consequently, this knowledge could be used to further design new materials and device architecture for more efficient systems. In particular, this dissertation focuses primarily on the morphology in a series of amorphous as

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22

Robertson, Christopher G. "Physical Aging of Miscible Polymer Blends." Diss., Virginia Tech, 1999. http://hdl.handle.net/10919/40427.

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Physical aging measurements were performed on various polymeric glasses with the overriding goal of developing a better molecular picture of the nonequilibrium glassy state. To this end, aging-induced changes in mechanical properties and in the thermodynamic state (volume and enthalpy) were assessed for two different miscible polymer blends as a function of both composition and aging temperature. This investigation considered the physical aging behavior of blends containing atactic polystyrene (a-PS) and poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) as well as mixtures of poly(methyl methacry

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23

Parker, M. A. "The electron microscopy of polymer blends." Thesis, Brunel University, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.353861.

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24

Lim, Kate. "Supramolecular polymer blends for composite matrices." Thesis, University of Reading, 2016. http://centaur.reading.ac.uk/66400/.

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This research project reports a new approach to thermoplastic composite matrix design, in which a low-MW polymer additive acts as a plasticiser and flow-promoter at high temperatures, but as a non-covalent cross-linking agent at lower temperatures. Thus, poly(aryl ether ketone)s (PAEKs) are functionalised with π-electron rich terminal groups and blended with π-electron deficient polyimides. A non-covalent charge-transfer stacking interaction between the two polymers forms a self-assembled supramolecular network. Carbon fibre composites with matrices composed of these supramolecular polymer ble

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25

Mamun, Chowdhury K. "Spatial modulation in crosslinked polymer blends /." Digital version accessible at:, 2000. http://wwwlib.umi.com/cr/utexas/main.

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26

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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27

Kanhegaonkar, Shivkalyan A. "Studies on conducting polymers: synthesis and characterization of conducting polymer blends." Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 2004. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/2873.

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28

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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29

Johnson, Jack Royce III. "POLYMER BLENDS, COMPOSITES AND AEROGEL MODIFICATION BY INNOVATIVE APPROACHES." Case Western Reserve University School of Graduate Studies / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=case1317409667.

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30

Ju, Lin. "Non-Covalent Interactions in Polymeric Materials: From Ionomers to Polymer Blends." Diss., Virginia Tech, 2019. http://hdl.handle.net/10919/102651.

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Conventional studies of ionomers have focused on ionomers bearing monovalent carboxylate or sulfonate pendant ions. There are relatively fewer studies on ionomers containing multivalent pendant ions, such as divalent phosphonate. In this dissertation, poly(ethylene terephthalate) (PET) and polystyrene ionomers with divalent phosphonate pendant ions have been synthesized, and the influence of divalent phosphonate pendant ions on the structure-morphology-property relationship has been compared to the ionomers with monovalent sulfonate pendant ions. The phosphonate groups generated a stronger phy

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31

Hindawi, Iyad Ali. "Flow dependence of miscibility in polymer blends." Thesis, Imperial College London, 1991. http://hdl.handle.net/10044/1/46820.

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32

Dittmer, Janke Jörn. "Dye/polymer blends for organic solar cells." Thesis, University of Cambridge, 2001. https://www.repository.cam.ac.uk/handle/1810/251783.

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33

Elliniadis, Stavros. "Phase separation in thermoplastic - thermoset polymer blends." Thesis, Imperial College London, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.266360.

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34

Holloway, Matthew James. "Electrically conducting composites formed from polymer blends." Thesis, Brunel University, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.316533.

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35

Chiou, Yung-Shi. "Local structural correlations in miscible polymer blends." Thesis, University of Reading, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.263072.

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36

Tavern, Sydney Christopher. "A spin-label study of polymer blends." Thesis, University of Aberdeen, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.320765.

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In the initial part of this study, electron spin resonance (ESR) spectra of polystyrene (PS) end-labelled with a nitroxide radical were recorded for both the pure polymer and for (1:1 w/w) blends with polyisoprene (PIP) containing varying amounts of PS-b-PIP triblock copolymer. The spectra reveal that the copolymer migrates to the interphase and that the rate of migration and final packing density of the copolymer in the interphase is dependent on the amount of copolymer in the blends. Further techniques were used to provide complementary data. The second part of this study examined the effect

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37

Fernandez, Fernandez Maria Luisa. "Mixing and demixing studies in polymer blends." Thesis, Imperial College London, 1989. http://hdl.handle.net/10044/1/47432.

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38

Bakhtiarian, Elaheh. "Synthesis and properties of conducting polymer blends." Thesis, Kingston University, 2014. http://eprints.kingston.ac.uk/28757/.

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Polymers and polymer-based composite materials with electrically-conductive properties are materials with various potential uses. Novel materials are becoming available in each field and new products are continuously being produced. Amid these new materials, conductive elastomers are presently being employed as antistatic materials in the carpets, antistatic coatings, sensors and electromagnetic screening. One promising method for making this type of material is to introduce carbon black or metal fillers, or more currently conducting polymer powders into natural or synthetic rubbers. Several p

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39

Hawksworth, M. "The rheology of liquid crystal polymer blends." Thesis, Sheffield Hallam University, 1993. http://shura.shu.ac.uk/19773/.

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The present studies are concerned with the observation and explanation of the interaction between liquid crystal and isotropic polymers. An investigation of the rheological behaviour has been carried out on blends containing small additions of a main chain thermotropic liquid crystal polymers using capillary rheometry. Samples of these blends were moulded and tested using a Hounsfield tensometer and a Houndsfield swinging arm impact rig. The addition of a small amount of liquid crystal polymer was found to have a major effect upon both the rheological and morphological properties of the base m

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40

Izumitani, Tatsuo. "Studies of Spinodal Decomposition of Polymer Blends." 京都大学 (Kyoto University), 2002. http://hdl.handle.net/2433/149438.

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41

Clarke, Christopher John. "The structure and kinetics of formation of grafted polymer layers." Thesis, University of Cambridge, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.320014.

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42

Wilshaw, Claire Tamsin. "Directed phase separation of polymer blends on binary-patterned polymer brushes." Thesis, University of Sheffield, 2009. http://etheses.whiterose.ac.uk/573/.

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Self-assembly of well-defined polymer microstructures is of interest for applications such as polymer solar cells, light emitting diodes, microelectronics and biosensors. Chemically patterned substrates can direct the phase separation of thin films of polymer blends, producing controlled morphologies. This has been demonstrated using patterned self-assembled monolayers. Binary-patterned polymer brushes provide a robust, chemically and topographically patterned surface which can interact with the blend, potentially resulting in interesting new behaviour, and greater control over phase separatio

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43

Lindberg, Henrik. "Electron microscopy and microanalysis of polymers and polymer blends : artifacts and applications /." Luleå, 1986. http://epubl.luth.se/avslutade/0348-8373/57/index.html.

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44

Patel, R. "Compatibilisation by chain coupling agents: engineering polymers/thermotropic liquid crystalline polymer blends." Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 2005. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/2453.

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45

Yang, Zhiyi. "Rheology of Miscible Polymer Blends with Hydrogen Bonding." University of Akron / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=akron1184881292.

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46

Ruiz, Ilza Aparecida dos Santos. "Adição de EPDM ou anidrido maléico na blenda LDPE/PA6 e suas propriedades finais." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/3/3133/tde-11052009-133033/.

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Em virtude do crescente volume da utilização de embalagens multicamadas na preservação de alimentos, torna-se necessário o estudo visando a reciclagem desses materiais através de seu reaproveitamento como matéria-prima e a transformação em novos produtos ou materiais. Dentre os vários tipos de reciclagem utilizados atualmente, a formação de blendas poliméricas com material descartado apresenta-se como uma alternativa viável, pois se trata de uma atividade moderna que une o desenvolvimento tecnológico e a preservação ambiental. O presente trabalho faz um estudo sobre a reciclagem de resíduos de

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47

Moilanen, A. (Anu). "Self-association, compatibility, and strengthening behavior of liquid crystalline oligomers." Doctoral thesis, University of Oulu, 1998. http://urn.fi/urn:isbn:9514250915.

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Abstract Synthetic routes were developed for the preparation of 2-alkoxy-4-hydroxybenzoic acids and 2-alkoxyhydroquinones, and a large-scale synthesis was developed for the preparation of 2-thioalkoxyhydroquinones. The 2-alkoxy-4-hydroxybenzoic acids, which contained alkyl side chains of different length, were used in the synthesis of new main chain liquid crystalline (LC) homo-, random, and block co-oligomers. In addition, oligomers of terephthaloyl chloride and 2-thioalkoxyhydroquinones and oligomers of terephthaloyl chloride and 2-alkoxyhydroquinones were produced. All the oligomers were b

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48

Rauschenberg, Nancy Carol. "Thermoplastic xylan derivatives and related blends." Thesis, This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-03172010-020606/.

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49

Leis, Paiva Felipe. "Interfacial behavior of Janus rods-stabilized immiscible polymer blends." Case Western Reserve University School of Graduate Studies / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=case1593868264853478.

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50

Rabie, Allan John. "Blends with low-density polyethylene (LDPE) and plastomers." Thesis, Stellenbosch : Stellenbosch University, 2004. http://hdl.handle.net/10019.1/49870.

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Thesis (MSc)--Stellenbosch University, 2004.<br>ENGLISH ABSTRACT: This study describes the design, building and optimization of a fully functional preparative TREF (Prep-TREF) apparatus. This apparatus allows for the fractionation of semicrystalline polyolefins according to the crystallizability of the molecules. Various factors, such as the sample cooling rate and the effect of on-support and off-support crystallization, are investigated. The preparative TREF is used to fractionate a commercial low-density polyethylene (LOPE), two commercially available plastomers (polyethylene-l-octen

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