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Dissertations / Theses on the topic 'High density polyethylene (HDPE)'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Siskind, Esther. "Market development for recycled high density polyethylene (HDPE)." Thesis, Massachusetts Institute of Technology, 1990. http://hdl.handle.net/1721.1/70176.

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2

Londoño, Ceballos Mauricio. "High-Density Polyethylene/Peanut Shell Biocomposites." Thesis, University of North Texas, 2014. https://digital.library.unt.edu/ark:/67531/metadc700037/.

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A recent trend in the development of renewable and biodegradable materials has led to the development of composites from renewal sources such as natural fibers. This agricultural activity generates a large amount of waste in the form of peanut shells. The motivation for this research is based on the utilization of peanut shells as a viable source for the manufacture of biocomposites. High-density polyethylene (HDPE) is a plastic largely used in the industry due to its durability, high strength to density ratio, and thermal stability. This research focuses in the mechanical and thermal properti

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3

Altintas, Bekir. "Electrical And Mechanical Properties Of Carbon Black Reinforced High Density Polyethylene/low Density Polyethylene Composites." Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/2/12604976/index.pdf.

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In this study, the High Density Polyethylene (HDPE) and Low Density Polyethylene (LDPE) blends prepared by Plasticorder Brabender were strengthened by adding Carbon Black (CB). Blends were prepared at 190 &deg<br>C. Amounts of LDPE were changed to 30, 40, 50 and 60 percent by the volume and the percent amounts of CB were changed to 5, 10,15, 20 and 30 according to the total volume. Thermal and morphological properties were investigated by using Differential Scanning Calorimeter (DSC), Scanning Electron Microscope (SEM). Mechanical properties were investigated by tensile test and hardness mea

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4

Hepburn, Derek Sinclair. "An investigation of the effect of structure on the fracture resistance of pipes and welds of Eltex TUB 120 Series HDPE." Thesis, Manchester Metropolitan University, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.386440.

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5

Ayche, Nadim S. "The Effect of High Density Polyethylene (HDPE) Pipe Profile Geometry on its Structural Performance." Ohio University / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1127140719.

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6

Svensson, Sofie. "Reprocessing and Characterisation of High Density Polyethylene Reinforced with Carbon Nanotubes." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-12853.

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Nanokomposit innehållande högdensitetspolyeten och kolnanorör återvanns och analyseradesför att undersöka hur materialets egenskaper påverkas av återvinning. Kompositenproducerades med 3 viktprocent kolnanorör och återvanns tio gånger genom att extrudera ochmala ner materialet. Analyser gjordes efter varje cykel av extrudering. Dessutom utfördessimulerade tester med kontinuerlig extrudering i 20, 100 och 200 minuter motsvarande 10, 50och 100 cykler. Därav kunde nedbrytningen av kompositen efter längre tids bearbetninganalyseras. I projektet studerades ett referensmaterial bestående av den rena

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7

Chehab, Abdul Ghafar. "Time dependent response of pulled-in-place HDPE pipes." Thesis, Kingston, Ont. : [s.n.], 2008. http://hdl.handle.net/1974/1239.

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8

Hudson, Benjamin S. "The Effect of Liquid Hot Filling Temperature on Blow-Molded HDPE Bottle Properties." Diss., CLICK HERE for online access, 2008. http://contentdm.lib.byu.edu/ETD/image/etd2716.pdf.

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9

Waldron, Calvin Michael. "Efficacy of Delmopinol in Preventing the Attachment of Campylobacter jejuni to Chicken, Stainless Steel and High-Density Polyethylene." Thesis, Virginia Tech, 2013. http://hdl.handle.net/10919/50861.

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Campylobacter spp. are the second leading bacterial cause of food borne illness in the U.S. New antimicrobials that prevent bacterial attachment may be effective for reducing Campylobacter. Delmopinol hydrochloride (delmopinol) is a cationic surfactant that is effective for treating and preventing gingivitis and periodontitis. This study evaluated the effectiveness of delmopinol for reducing attachment of Campylobacter jejuni to chicken, stainless steel and high-density polyethylene. Chicken pieces, steel and HDPE coupons were spot-inoculated with 0.1 mL of a Campylobacter jejuni culture

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10

Enriquez, Sevilla Luis Javier. "Activity of phosphite antioxidants in synergistic blends in the thermal and photooxidation of high-density polyethylene (HDPE)." Thesis, Manchester Metropolitan University, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364483.

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11

Pinto, Angela Marie III. "Quantitative Analysis of Antioxidants from High Density Polyethylene (HDPE) by off-line Supercritical Fluid Extraction Coupled High Performance Liquid Chromatography." Thesis, Virginia Tech, 1997. http://hdl.handle.net/10919/36932.

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Plastics are widely used and they vary in their applicability, ranging from automobile parts, components for houses and buildings, and packaging for everything from food to electronic parts. The diverse applications of plastics, such as polystyrene, polyolefins and polyester, are credited to the incorporation of additives. Additives improve the performance of these and other polymer resins. Without the incorporation of such additives, for example Ethanox Â® 330, some plastics would degrade during processing or over time. To ensure that the specified amount of an additive or combination of

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12

Yazdani, Iman. "High density polyethylene (HDPE) containers as an alternative to polyethylene terephthalate (PET) bottles for solar disinfection of drinking water in northern region, Ghana." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/39273.

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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2007.<br>Includes bibliographical references (leaves 76-82).<br>The purpose of this study is to investigate the technical feasibility of high density polyethylene (HDPE) containers as an alternative to polyethylene terephthalate (PET) bottles for the solar disinfection of drinking water in the Northern Region of Ghana, in a process know as SOLAIR. This study is in line with the intention of Pure Home Water, a registered non-profit organization in Ghana, to offer a variety of low-cost househol

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13

Shaheer, Muhammad. "Effects of welding parameters on the integrity and structure of HDPE pipe butt fusion welds." Thesis, Brunel University, 2017. http://bura.brunel.ac.uk/handle/2438/16919.

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Butt fusion welding process is an extensively used method of joining for high density polyethylene (HDPE) pipe. With the increasing number of HDPE resin and pipe manufacturers and the diversity of industries utilising HDPE pipes, a wide range of different standards have evolved to specify the butt fusion welding parameters with inspection and testing methods, to maintain quality and structural integrity of welds. There is a lack of understanding and cohesion in these standards for the selection of welding parameters; effectiveness, accuracy, and selection of the test methods and; correlation o

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14

Casas, Carné María del Pilar. "Study of compatibilization methods for high density polyethylene and ground tyre rubber : exploring new route to recycle scrap tyres." Doctoral thesis, Universitat Politècnica de Catalunya, 2010. http://hdl.handle.net/10803/6482.

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Cotxes, camions, tractors, avions... tots necessiten els neumàtics com a component imprescindible per al seu funcionament. Malauradament, degut al desgast per ús, els neumàtics tenen una vida útil limitada que obliga a renovar-los cada cert temps passant a ser Neumàtics Fora d'Ús (NFU). Paradògicament, els neumàtics són formulats per a suportar condicions extremes d'ús i, entre d'altres matèries primeres contenen cautxú vulcanitzat, una elevada quantitat d'estabilitzants i d'altres additius que fan dels neumàtics un material no biodegradable. Fins al 2006, era possible desar els NFU en abocad

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15

Trindade, Nuno Miguel Passarinho. "Stochastic modeling of the thermal and catalytic degradation of polyethylene using simultaneous DSC/TG analysis." Master's thesis, Faculdade de Ciências e Tecnologia, 2012. http://hdl.handle.net/10362/8468.

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Dissertação para obtenção do Grau de Mestre em Engenharia Química e Bioquímica<br>In the present work a stochastic model to be used for analyzing and predicting experimental data from simultaneous thermogravimetric (TG) and differential scanning calorimetry (DSC) experiments on the thermal and catalytic degradation of high-density polyethylene (HDPE) was developed. Unlike the deterministic models, already developed, with this one it’s possible to compute the mass and energy curves measured by simultaneous TG/DSC assays, as well as to predict the product distribution resulting from primary cra

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16

Yi, Nan. "Influence of the molecular orientation of high density polyethylene by mechanical drawing on the surface mechanical behaviors." Thesis, Strasbourg, 2019. http://www.theses.fr/2019STRAE015.

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Les polymères semi-cristallins ont de multiples applications tribologiques et il est très intéressant d’avoir une compréhension globale de la relation structure-propriété afin d’améliorer leurs performances. Cette thèse porte sur les réponses mécaniques anisotropes des surfaces de polymères semi-cristallins orientés. Ces travaux sur du polyéthylène haute densité (PEHD) ont mis en évidence l’effet de cette anisotropie induite sur le comportement viscoélastique étudié par une méthode de fluage de contact et de récupération, ainsi que sur le comportement plastique en rayure. Les dépendances de l'

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17

Araújo, Maria José Gomes de. "Misturas de PEAD/quitosana: morfologia e caracterização térmica e mecânica." Universidade Federal da Paraíba, 2014. http://tede.biblioteca.ufpb.br:8080/handle/tede/449.

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Made available in DSpace on 2015-04-01T12:17:42Z (GMT). No. of bitstreams: 1 arquivototal.pdf: 15897135 bytes, checksum: 47ccae1f15e072aad07f5eb733587b9f (MD5) Previous issue date: 2014-03-21<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES<br>This research have the aim of prepare mixture of high density polyethylene (HDPE) and chitosan (CS) with and without compatibilizers agents. To this, have developed in laboratory, powders by two different methods, precipitation and evaporation. It was used like compatibilizers agents on mixture HDPE/CS. They are chemically mo

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18

Scapini, Patrícia. "Morfologia e propriedades térmicas de compósitos de HDPE/EVA com POSS." reponame:Repositório Institucional da UCS, 2008. https://repositorio.ucs.br/handle/11338/370.

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Neste trabalho foram estudados compósitos que apresentam como matriz polimérica uma blenda composta por polietileno de alta densidade (HDPE) e copolímero etileno acetato de vinila (EVA) e como nanocarga, silsesquioxano poliédrico oligomérico (POSS). Os compósitos foram processados em câmara de mistura fechada e caracterizados quanto às propriedades térmicas e morfológicas. Para a preparação dos compósitos foram variadas as concentrações dos componentes da blenda (0, 25, 50, 75 e 100%) e da nanocarga (0, 0,5, 1, 1,5, 2, 5 e 10%). Os resultados de processamento mostraram que o aumento da concent

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19

Palmer, Hilary R. "Bottle water storage location and its impact on microbiogical quality." Honors in the Major Thesis, University of Central Florida, 2009. http://digital.library.ucf.edu/cdm/ref/collection/ETH/id/1304.

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This item is only available in print in the UCF Libraries. If this is your Honors Thesis, you can help us make it available online for use by researchers around the world by following the instructions on the distribution consent form at http://library.ucf.edu/Systems/DigitalInitiatives/DigitalCollections/InternetDistributionConsentAgreementForm.pdf You may also contact the project coordinator, Kerri Bottorff, at kerri.bottorff@ucf.edu for more information.<br>Bachelors<br>Engineering and Computer Science<br>Environmental Engineering

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20

Gill, Yasir Q. "Preparation and characterization of polyethylene based nanocomposites for potential applications in packaging." Thesis, Loughborough University, 2015. https://dspace.lboro.ac.uk/2134/18052.

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The objective of my work was to develop HDPE clay nanocomposites for packaging with superior barrier (gas and water) properties by economical processing technique. This work also represents a comparative study of thermoplastic nanocomposites for packaging based on linear low density polyethylene (LLDPE), high density polyethylene (HDPE) and Nylon12. In this study properties and processing of a series of linear low density polyethylene (LLDPE), high density polyethylene (HDPE) and Nylon 12 nanocomposites based on Na-MMT clay and two different aspect ratio grades of kaolinite clay are discussed.

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21

Melo, Jessyka Meierjurgen. "Caracterização de compósito produzido com diferentes frações de pó de madeira e polietileno de alta densidade." Universidade Presbiteriana Mackenzie, 2015. http://tede.mackenzie.br/jspui/handle/tede/1359.

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Made available in DSpace on 2016-03-15T19:36:55Z (GMT). No. of bitstreams: 1 Jessyka Meierjurgen Melo.pdf: 1463151 bytes, checksum: b96ae4642ea3139b9e867598e3bba7c1 (MD5) Previous issue date: 2015-06-15<br>The present work aimed to highlight the study of polymeric composite development to be responsible with the environment and with the growth of the recycling of materials, from the use of high-density polyethylene (HDPE) with eucalyptus wood dust from the manufacturing furniture. The study started from a literature search where were analyzed the factors involving the subject in question, hi

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22

Quezel-Castraz, Vincent. "Développement et optimisation mécanique d'un filtre innovant pour le traitement de l’eau potable." Electronic Thesis or Diss., Chasseneuil-du-Poitou, Ecole nationale supérieure de mécanique et d'aérotechnique, 2024. http://www.theses.fr/2024ESMA0011.

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L'objet de l'étude porte sur l'adaptation d'une technologie de filtration gravitaire pour le traitement de l'eau. Afin de réduire le coût de fabrication et limiter l'interaction néfaste avec les milieux aqueux agressifs, il est intéressant de réfléchir à la transition de structures en acier inoxydable vers un système en matériau polymère. Ces filtres gravitaires sont placés sous un lit de média filtrant, généralement du sable. Peu accessibles une fois installés, ils doivent être dimensionnés pour une longue durée de vie. Au cours de son utilisation, un filtre gravitaire est sollicité mécanique

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23

Ansari, Mahmoud. "Rheology and processing of high-density polyethylenes (HDPEs) : effects of molecular characteristics." Thesis, University of British Columbia, 2012. http://hdl.handle.net/2429/43283.

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In this study, the linear viscoelastic properties of two series of Ziegler-Natta and metallocene HDPEs (ZN-HDPEs and m-HDPEs respectively) of broad molecular weight distribution (MWD) have been studied. Relationships between the zero-shear viscosity and molecular weight (Mw) and molecular weight distribution show that the breadth of the molecular weight distribution (MWD) for m-HDPEs plays a significant role. Other interesting correlations between the crossover modulus and steady state compliance with MWD of both these classes of polymers have also been derived. Finally, the steady-shear visc

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24

Khan, Mohammad Ashraf. "Surface properties of high density polyethylene and cross-linked polyethylene." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/mq52587.pdf.

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25

Parmar, Harisinh, and h_arzoo@yahoo com. "Rheology Of Peroxide Modified Recycled High Density Polyethylene." RMIT University. Civil, Environmental and Chemical Engineering, 2008. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20080724.164249.

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Consumption of plastics has increased exponentially, in line with the world's population. Not surprisingly this is reflected in enormous growth of the plastic industry especially during the last five decades. Commensurate with this, waste produced from plastics consumption has created a major environmental problem. Many types of waste disposal methods have been used all over the world so far, but all of them have disadvantages. Furthermore, some methods are responsible for the generation of green house gases and further contribution to global warming. Recently, reduction of green house gas emi

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26

Lim, Bah Chin. "Impact of blow-moulded high density polyethylene containers." Thesis, Queen Mary, University of London, 1986. http://qmro.qmul.ac.uk/xmlui/handle/123456789/1360.

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27

SCHINAZI, GUSTAVO. "HIGH-DENSITY POLYETHYLENE COMPOSITES REINFORCED WITH IN2W3O12 NANOPARTICLES." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2016. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=29717@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO<br>CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO<br>FUNDAÇÃO DE APOIO À PESQUISA DO ESTADO DO RIO DE JANEIRO<br>BOLSA NOTA 10<br>O Polietileno de Alta Densidade (PEAD) é um dos materiais mais conhecidos e é utilizado em diversos campos de aplicação. Apesar de suas inúmeras qualidades, como baixa densidade, alta ductilidade e alta resistência específica, esse material possui algumas desvantagens que limitam a sua aplicabilidade, tais como baixa rigidez, baixa estabilidade térmica e alta expansividade térmica. Por outro lado, exi

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28

Lutton, R. "The effect of Maleic Anhydride-grafted-high density polyethylene combatibilisers on the structure and properties of high density polyethylene/montmorillonite nanocomposities." Thesis, Queen's University Belfast, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.679044.

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Nanocomposites have received a great deal of attention in recent years; particularly polymer layered silicate nanocomposites such as montmorillonite, where the surface to volume ratio is exceptionally high. As a result of their ultrafine phase dimensions, these layered silicate nanocomposites possess unique properties typically not shared by more conventional microcomposites and, therefore, offer new technology and business opportunities. However, despite the attention, the influence of compatibilisers on the nanocomposites is not well understood; more critically, the literature exposes a larg

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29

Rajasekaran, Nepolean. "A Nonlinear Constitutive Model for High Density Polyethylene at High Temperature." University of Cincinnati / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1298041213.

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30

Lewucha, Cezary. "Stabilisation and characterisation of peroxide-crosslinked high density polyethylene." Thesis, Aston University, 2012. http://publications.aston.ac.uk/26117/.

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31

Benoit, Nathalie. "Mechanical recycling of high density polyethylene/flax fiber composites." Doctoral thesis, Université Laval, 2017. http://hdl.handle.net/20.500.11794/27713.

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Ce travail de doctorat est consacré à la production, au recyclage mécanique long-terme et à la caractérisation de matériaux polymères et composites à base de polyéthylène haute densité (HDPE) et de fibre de lin. L’objectif est de déterminer l’aptitude au recyclage long-terme de ces composites et de leur matrice, tout en évaluant la perte de performance subie. Le recyclage est réalisé ici par une extrusion en boucle fermée, durant 50 cycles, sans ajout intermédiaire de matières vierges et sans prise en compte de la détérioration et de la contamination subies lors du cycle de vie des produits. D

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32

Ou, Byoung S. "Laser welding of high density polyethylene and polypropylene plates." Connect to resource, 1992. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1155307464.

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33

Lima, Stevie Hallen. "Degrada??o catal?tica de polietileno de alta densidade sobre a ze?lita HZSM." Universidade Federal do Rio Grande do Norte, 2009. http://repositorio.ufrn.br:8080/jspui/handle/123456789/17613.

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Made available in DSpace on 2014-12-17T15:41:46Z (GMT). No. of bitstreams: 1 StevieHLpdf.pdf: 1475886 bytes, checksum: e83c49569bddebb612701e2de7e607bc (MD5) Previous issue date: 2009-08-31<br>Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior<br>In last years it has talked a lot about the environment and the plastic waste produced and discarded. In last decades, the increasing development of research to obtain fuel from plastic material, by catalytic degradation, it has become a very attractive looking, as these tailings are discarded to millions worldwide. These materials take a l

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34

Isik, Coskunses Fatma. "Ternary Nanocomposites Of Low Density,high Density And Linear Low Density Polyethylenes With The Compatibilizers E-ma_gma And E-ba-mah." Phd thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613294/index.pdf.

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The effects of polyethylene, (PE), type, compatibilizer type and organoclay type on the morphology, rheological, thermal, and mechanical properties of ternary low density polyethylene (LDPE), high density polyethylene (HDPE), and linear low density polyethylene (LLDPE), matrix nanocomposites were investigated in this study. Ethylene &ndash<br>Methyl acrylate &ndash<br>Glycidyl methacrylate terpolymer (E-MAGMA) and Ethylene &ndash<br>Butyl acrylate- Maleic anhydrate terpolymer (E-BA-MAH) were used as the compatibilizers. The organoclays selected for the study were Cloisite 30B and Nanofil 8. Na

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35

Zhang, Jingyu Hsuan Grace. "Experimental study of stress cracking in high density polyethylene pipes /." Philadelphia, Pa. : Drexel University, 2006. http://dspace.library.drexel.edu/handle/1860/747.

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36

Cagirici, Seda. "Graft Copolymerization Of P-acryloyloxybenzoic Acid Onto High Density Polyethylene." Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/12607968/index.pdf.

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The monomer, p-acryloyloxybenzoic acid (ABA) was synthesized by condensation reaction of acryloyl chloride and p-hydroxybenzoic acid in alkaline medium. Polymerization of the monomer and grafting of the produced polymer (PABA) onto high density polyethylene (HDPE) were expected to be carried simultaneously in melt mixing at high temperature. The graft copolymerization was studied at varying concentrations of the monomer in the reaction mixture at constant temperature (200 0C). Grafted HDPE samples were investigated by several techniques such as DSC, FTIR, MFI and mechanical testing. The tens

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37

Nahid, Farzana. "The temperature dependence of positronium formation in high density polyethylene." Thesis, Click to view the E-thesis via HKUTO, 2008. http://sunzi.lib.hku.hk/HKUTO/record/B39558642.

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38

Paxton, Naomi C. "Additive manufacturing patient-specific porous high-density polyethylene surgical implants." Thesis, Queensland University of Technology, 2020. https://eprints.qut.edu.au/205616/1/Naomi_Paxton_Thesis.pdf.

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This thesis investigated how 3D printing technology can be used to manufacture patient-specific surgical implants for maxillofacial and cranial reconstruction. Novel 3D printed implants were compared to current clinical gold-standard implants to assess material properties, implant structure and internal architecture, and the impact of manufacturing conditions such as porosity and surface treatments on cell attachment and soft tissue healing in a small animal model. These novel implants demonstrated rapid soft tissue and vascular ingrowth, showing promise for patient-specific implant manufactur

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39

Joseph, Roy. "Development of an injection moulding grade hydroxyapatite polyethylene composite." Thesis, Queen Mary, University of London, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.395936.

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40

Konaganti, Vinod Kumar. "Extrudate swell of high density polyethylene in capillary and slit dies." Thesis, University of British Columbia, 2016. http://hdl.handle.net/2429/60136.

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The analysis of extrudate swell in polymer melts is of great importance in many polymer processing operations and has been the subject of interest both experimentally and numerically. The main objectives of this research work are to obtain systematic and reliable extrudate swell data of a high molecular weight HDPE, to identify a suitable constitutive model that can precisely represent extrudate swell phenomena and to predict extrudate swell accurately under various processing and operating conditions. A novel extrudate swell measuring system with an online data acquisition system is designed

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41

Barreto, Marie de Chantal. "Crystallisation kinetics of high density polyethylene pre-sheared in the melt." Thesis, McGill University, 1989. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=61763.

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42

Money, Mark William. "Instrumental falling weight impact testing of polymethacrylate and high density polyethylene." Thesis, Queen Mary, University of London, 1988. http://qmro.qmul.ac.uk/xmlui/handle/123456789/1583.

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A study has been made of the Instrumented Falling Weight Impact Test, investigating and analysing the effect of test parameters and specimen geometry on the characteristic results of the test. Two materials, poly(methylmethacrylate) and high density polyethylene are chosen, which exhibit typical extremes of brittle or ductile behaviour. High speed photography is used to monitor the development of deformation and progress of failure during the impact test. The major features of typical force-time curves obtained from the tests on PMMJL and HDPE are thus characterised in terms of failure develop

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43

Xu, Songbo. "Mechanical and Tribological Properties of Carbon Nanofiber Reinforced High Density Polyethylene." Diss., North Dakota State University, 2014. https://hdl.handle.net/10365/27288.

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High density polyethylene (HDPE) is widely used as a bearing material in industrial application because of its low friction and high wear resistance. Reinforcing polymers with the appropriate nanofillers is an effective way to obtain a variety of enhanced material properties. Carbon nanofibers (CNFs) with silane coatings (two thicknesses: 2.8 nm and 46 nm) were added into high density polyethylene (HDPE) to improve the tribological properties of the nanocomposite material. The goal of the present study is to investigate how the mechanical, thermal, and wear behavior of HDPE can be altered by t

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Taylor, Scott. "The catalytic transformation of polymer waste using modified clay catalysts." Thesis, Sheffield Hallam University, 2002. http://shura.shu.ac.uk/20428/.

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A variety of modified minerals have been screened to determine their effectiveness as agents for the catalytic transformation of the thermally generated off gases arising from the pyrolysis of the polyolefinic plastic High Density Polyethylene (HDPE). This polymer has been shown to degrade through a series of known mechanisms to yield a hydrocarbon product mixture consisting of an homologous series of saturated and unsaturated hydrocarbons which include alk-1-enes, n-alkanes, alk-x-enes and a-w-dienes. Modification treatments have been wide ranging having included activation of the parent mine

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Zhang, Chuntao. "Non-linear mechanical response of high density polyethylene in gravity flow pipes." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq21324.pdf.

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Zhang, Yu. "Further application of hydroxyapatite reinforced high density polyethylene composite - skull reconstruction implants." Thesis, Queen Mary, University of London, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.414001.

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Petiraksakul, Pinsupha. "Effect of stearate/stearic acid coating on filled high density polyethylene properties." Thesis, Loughborough University, 2000. https://dspace.lboro.ac.uk/2134/11166.

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High density polyethylene (HDPE) is a widely used plastic but it is also a combustible material. One way of reducing flammability is to add fillers, such as magnesium hydroxide (Mg(OH)2). However, this has a deleterious effect on the mechanical properties of composites. It has been found that one possible method of restoring mechanical properties is to modifY the filler particles with coating agents, such as stearic acid. In the present work, this idea was taken a stage further with the use of various metal stearates (e.g. magnesium stearate, calcium stearate, and zinc stearate) for modifying

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Xiang, Dong. "Processing and properties of melt processed high density polyethylene-carbon nanofiller composites." Thesis, Queen's University Belfast, 2015. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.676504.

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The main aim of this work was to investigate the process-structure-property relationship of high density polyethylene (HOPE)/carbon nanofiller composites. A secondary aim was to develop thin thermoplastic films with enhanced electrical and mechanical properties for the potential use in aerospace applications. Three types of carbon nanofillers with different dimensions, multi-walled carbon nanotubes (MWCNTs), graphite nanoplatelets (GNPs) and carbon black (CB) respectively, were used to reinforce the polymer matrix. The melt-mixed HOPE/carbon nanofiller composites were processed by compression

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Mitroka, Susan M. "Modulation of Hydroxyl Radical Reactivity and Radical Degradation of High Density Polyethylene." Diss., Virginia Tech, 2010. http://hdl.handle.net/10919/77137.

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Oxidative processes are linked to a number of major disease states as well as the breakdown of many materials. Of particular importance are reactive oxygen species (ROS), as they are known to be endogenously produced in biological systems as well as exogenously produced through a variety of different means. In hopes of better understanding what controls the behavior of ROS, researchers have studied radical chemistry on a fundamental level. Fundamental knowledge of what contributes to oxidative processes can be extrapolated to more complex biological or macromolecular systems. Fundamental conce

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Traina, Matteo. "Preparation and properties of micro- and nanocomposites based on high density polyethylene." Doctoral thesis, Università degli studi di Trento, 2008. https://hdl.handle.net/11572/368262.

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The primary objectives of this thesis were to investigate and compare the fracture and creep behaviour of micro- and nanocomposites based on polyethylene (PE) produced by melt mixing. To achieve these objectives, different fillers were considered: micrometric copper particles, nanometric carbon blacks (CBs) and multiwalled carbon nanotubes (MWCNTs). In the first part of this dissertation, the fracture behaviour of PE-CB composites was investigated via the Essential Work of Fracture (EWF) approach by producing composites with different CBs in order to investigate the effect of the filler partic

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