Search for dissertations about: "polyethylene"
Showing result 11 - 15 of 302 swedish dissertations containing the word polyethylene.
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11. Polyethylene/metal oxide nanocomposites for electrical insulation in future HVDC-cables : probing properties from nano to macro
Abstract : Nanocomposites of polyethylene and metal oxide nanoparticles have shown to be a feasible approachto the next generation of insulation in high voltage direct current cables. In order to reach an operationvoltage of 1 MV new insulation materials with reduced conductivity and increased breakdown strengthas compared to modern low-density polyethylene (LDPE) is needed. READ MORE
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12. On the production of polyethylene dielectrics and conductive polymer composite fibres
Abstract : Foamed cable insulations and conductive polymer composite fibres are two applications in polymer processing where the electrical properties of a material may be altered significantly during processing. Their common denominator is that the outcome depends to a large degree on the flow behaviour of the polymer melt, in particular the melt extensional properties. READ MORE
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13. Structure and Mechanical/Transport properties of Single and Multilayer Polyethylene-based Materials
Abstract : The current study discusses the structure, mechanical and transport properties of polyethylene-based materials into two parts. The first part deals with the migration and chemical depletion of active substance such as insecticides from moulded polyethylene sheets. READ MORE
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14. The influence of Morphology on the Transport and Mechanical Properties of Polyethylene
Abstract : The sorption/desorption behaviour of n-hexane in high molarmass linear polyethylene (PE) and branched PEs with 0.39 and5.09 hexyl branches per 100 main chain C atoms andcrystallinities between 4 and 82% at 298 K has been studied.Crystal core contents determined by Raman spectroscopy werealways lower than those determined by density measurements. READ MORE
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15. Fundamentals of Polyethylene Composites for HVDC Cable Insulation – Interfaces and Charge Carriers
Abstract : Power transmission over long distances by using high voltage direct current (HVDC) cables is important for the transition from fossil energy to using renewable energy sources, e.g. wind, solar and water. READ MORE