Date of Award
Electrical and Computer Engineering
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This thesis presents a laboratory study on the hydrophobic performance of ethylene propylene diene monomer (EPDM), on the effects of heat treatment and surface analysis. It has been found that the maintenance of the water repellency of the surface of EPDM, after a temporary loss of its hydrophobicity, is due to the diffusion of low molecular weight (LMW) fluid from the bulk to the surface. The LMW fluid could be regenerated by the scissions of long molecular chains. A detailed study of the regenerated LMW fluid during heating in an electrical oven and after laser beam bombardments has been carried out. A study on the decomposition of ATH filler has also been done. A study to determine the surface hydrophobicity before and after the heat treatment is reported. A study on the photo-micrographs of fracture surface of EPDM and quantitative surface elemental analysis by using Scanning Electron Microscopy (SEM) is carried out. A study of the identification of the LMW fluid using Nuclear Magnetic Resonance (NMR) is reported. A study on the chain length of the siloxane and its concentration using Gas Chromatograph (GC-MS) has been done. The study on the molecular bonds and diffusion process of LMW fluid in the EPDM specimens by the use of ATR attached Fourier transform infrared spectroscopy (FT-IR) has also been performed. (Abstract shortened by UMI.)Dept. of Electrical and Computer Engineering. Paper copy at Leddy Library: Theses & Major Papers - Basement, West Bldg. / Call Number: Thesis1998 .C35. Source: Masters Abstracts International, Volume: 39-02, page: 0580. Adviser: R. Hackam. Thesis (M.A.Sc.)--University of Windsor (Canada), 1998.
Cao, Liwen, "Effects of heat on the hydrophobicity of EPDM composite insulators." (1998). Electronic Theses and Dissertations. 1852.