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Relevant bibliographies by topics / Plastic Materials - Degradation / Dissertations / Theses

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Dissertations / Theses on the topic 'Plastic Materials - Degradation'

Author: Grafiati

Published: 1 June 2024

Last updated: 31 July 2025

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1

Gregory, P. W. "Finite elastic-plastic deformations of highly anisotropic materials." Thesis, University of Nottingham, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.282601.

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2

Halliwell, Susan M. "Weathering of plastics glazing materials." Thesis, Loughborough University, 1996. https://dspace.lboro.ac.uk/2134/15369.

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Plastics glazing materials have properties which allow their widespread use in construction, for example as rootlights. However, they are more susceptible than is glass to degradation by weathering, notably the combined effects of ultraviolet light, heat and moisture. Examples of unacceptable durability have been seen in practice, particularly when high operating temperatures occur in sunlight. Artificial weathering tests are used to assess plastics glazing materials in a reasonably short time, two main types being utilised in this study. The applicability of ultra-fast methods of accelerated

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3

Li, Junhong. "Elastic - plastic interfacial crack problems." Thesis, University of Glasgow, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.297517.

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4

Davenport, James Charles William. "Mixed mode elastic-plastic fracture." Thesis, University of Bristol, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.357788.

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5

Viesca, Lobaton Gabriel D. "Fatigue crack propagation in plastic fields." Thesis, University of Oxford, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.301842.

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6

Resen, Abdul-Amir S. "Biaxial creep of plastics." Thesis, University of Manchester, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.256753.

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7

Stelmashenko, Nadia. "Microstructural studies of plastic indentations at low loads." Thesis, University of Cambridge, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.390178.

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8

Lim, Chwee-Teck. "Effects of compliance and friction on elastic-plastic impact." Thesis, University of Cambridge, 1996. https://www.repository.cam.ac.uk/handle/1810/273133.

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9

Wahl, Aurélie. "Distribution et comportement de débris plastiques dans un sol agricole amendé en compost de déchets ménagers." Electronic Thesis or Diss., Rennes 1, 2022. http://www.theses.fr/2022REN1B031.

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Les déchets plastiques s’accumulent dans tous les compartiments environnementaux, et cette présence suscite un vif intérêt de la part de la communauté scientifique. Pourtant, leur étude dans les sols n’est que très récente par rapport aux rivières et océans. Ce travail de doctorat s’est donc concentré sur le comportement des micro- et nanoplastiques et des contaminants associés issus de l’amendement en compost de déchets ménagers, enrichi en débris plastiques dans un sol agricole. Les microplastiques collectés dans le sol ont un degré d’altération avancé qui favorise la libération de petites p

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10

Goldthorpe, Martin Richard. "An elastic-plastic finite element program with applications to cracked bodies." Thesis, University of Sheffield, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.315414.

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11

Boal, Joseph T. "Biaxial creep and recovery of engineering plastics." Thesis, University of Manchester, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.277699.

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12

Chen, Kai Sheng. "Dynamic plastic response and failure prediction of clamped pipelines under lateral impact." Thesis, University of Portsmouth, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.310410.

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13

Hocking, Philippa J. (Philippa Jane). "Synthesis, characterization, and enzymatic degradation of poly[R,S)-b-hydroxybutyrate] of varied tacticities." Thesis, McGill University, 1996. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=40137.

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Poly ((R)-$ beta$-hydroxybutyrate), PHB, is a naturally-occurring thermoplastic polyester of widespread interest due to its inherent biodegradability. A synthetic racemic analogue, poly ((R,S)-$ beta$-hydroxybutyrate), was prepared via the methylaluminoxane-catalyzed polymerization of (R,S)-$ beta$-butyrolactone, and fractionated to yield a range of tacticities, including new material primarily syndiotactic in nature. Each fraction was characterized, and the syndiotactic crystal structure was examined. An x-ray fibre diagram was recorded, the measured reflections were indexed, and a tetragonal

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14

Beheshty, M. H. "Interaction between impact damage and fatigue in fibre reinforced plastics." Thesis, University of Bath, 1997. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.362306.

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15

Al-Bastaki, Nader Mohamed Saleh. "The effects of strain rate on the mechanical properties of filament wound-fibre reinforced plastic tubes." Thesis, University of Manchester, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364039.

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16

Zahir, Aishath Zehereen. "Degradation of e-glass fibre in selected organic acids." Thesis, Curtin University, 2008. http://hdl.handle.net/20.500.11937/1654.

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E-glass has been widely used as a reinforcing material for years, especially as a plastic reinforcer in the production of GRP (Glass Reinforced Plastic). Failure of GRP materials under stress came in to the picture quite recently. Since then studies have been conducted in an attempt to understand the causes and the underlying behaviour.Except for the last section of the research (analysis using a kinetic approach) where glass fibre was cut out to weigh approximately 1.0g, standard sized specimens were soaked in the required acid solutions of desired concentrations for varying temperatures and

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17

Zahir, Aishath Zehereen. "Degradation of e-glass fibre in selected organic acids." Curtin University of Technology, Department of Applied Chemistry, 2008. http://espace.library.curtin.edu.au:80/R/?func=dbin-jump-full&object_id=128425.

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E-glass has been widely used as a reinforcing material for years, especially as a plastic reinforcer in the production of GRP (Glass Reinforced Plastic). Failure of GRP materials under stress came in to the picture quite recently. Since then studies have been conducted in an attempt to understand the causes and the underlying behaviour.<br>Except for the last section of the research (analysis using a kinetic approach) where glass fibre was cut out to weigh approximately 1.0g, standard sized specimens were soaked in the required acid solutions of desired concentrations for varying temperatures

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18

Karamanlioglu, Mehlika. "Environmental degradation of the compostable plastic packaging material poly(lactic) acid and its impact on fungal communities in compost." Thesis, University of Manchester, 2013. https://www.research.manchester.ac.uk/portal/en/theses/environmental-degradation-of-the-compostable-plastic-packaging-material-polylactic-acid-and-its-impact-on-fungal-communities-in-compost(6caccf89-2f88-461c-999b-8d89c6be67e9).html.

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Conventional plastics have been used for decades in a diverse range of applications, however, many are resistant to degradation, leading to environmental pollution and their manufacture is dependent on non-renewable fossil fuels. Therefore, there has been an increasing need for eco-friendly biodegradable materials from renewable resources. Poly(lactic acid) (PLA) is a compostable polyester with a hydrolysable backbone that is susceptible to biodegradation and produced from renewable feedstocks. PLA has mechanical qualities comparable to non-biodegradable plastics, and currently is commercializ

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19

Wheeler, Nicholas Robert. "Lifetime and Degradation Science of Polymeric Encapsulant in Photovoltaic Systems: Investigating the Role of Ethylene Vinyl Acetate in Photovoltaic Module Performance Loss with Semi-gSEM Analytics." Case Western Reserve University School of Graduate Studies / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=case1473440287427776.

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20

Walsh, Peter J. "Aspects of environmental degradation and fracture in polymer films and fibers." 2007. https://scholarworks.umass.edu/dissertations/AAI3289223.

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This thesis is focused in three areas: An investigation of a thermodynamic criterion for failure by environmental stress cracking using observations of the wetting behavior of stress-cracking liquids on glassy polymer substrates; Determination of the dominant chemical and physical degradation mechanisms associated with exposure of poly-p-phenylenebisbenzoxazole fiber to moisture moisture and UV-Vis spectrum light; And finally, the effect of constraint on fracture at a bi-material interface is investigated using a model epoxy-metallic adherend specimen. The wetting behavior of an ESC liquid on

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21

(7038068), Nelyan Lopez-Perez. "Detection of Early Stages of Degradation on PPTA Fibers Through the Use of Positron Annihilation Lifetime Spectroscopy." Thesis, 2019.

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<p>High-performance fibers used for ballistic protection are characterized by having outstanding mechanical properties such high modulus and strength. These mechanical properties are granted by the fiber’s chemical and physical structure as well as their high degree of orientation. Twaron fibers are one of the most commonly used fibers on soft body armors such as bulletproof vests. They are made from poly (p-phenylene terephthalamide) (PPTA), a rigid-rod and highly crystalline polymer. Although these fibers are crystalline and have great mechanical properties, their performance can decrease wh

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