| Summary: | 碩士 === 國立成功大學 === 化學工程學系 === 102 === Ethylene-propylene diene monomer (EPDM), polyurethane (PU) and chlorinated polyethylene (cPE) ternary blend added 2 phr dicumyl peroxide (DCP) which as a crosslinking agent were kneaded by brabender, and the morphology before and after crosslinking were observed. As blends were under high temperature, crosslinking reaction will occur, then the density of crosslinking were measured. The relationship between density of crosslinking and mechanical properties were discussed. Besides, we also focus on the kinetics of crosslinking reaction.
The uncrosslinked and crosslinked blends were observed by scanning electron microscope (SEM), we may know the dispersion of blends from the results. The kinetics of crosslinking reaction were analyzed by rheometer. The degree of crosslinking were measured by weighing. We use universal tensile testing machine to measure the density of crosslinking by Mooney-Rivlin equation and compare mechanical properties of crosslinked blends with different cPE contents. We found that increasing cPE content will improve mechanical properties, but density of crosslinking decreases.
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