Low density polyethylene/ethylene-propylene rubber blends foam crosslinked by electron beam

• Main Authors: Chih-Kuang Chuang, 莊志光
• Other Authors: 余子隆
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/90188846277831469903

碩士 === 元智大學 === 化學工程與材料科學學系 === 94 === LDPE (Low density polyethylene) has a simple chemical structure. It could be recycled and regenerated easily, most of its combustion products are carbon dioxide and water. This study, LDPE was blended with EPR (ethylene-propylene rubber) and irradiated by electron beam under heat to make foam materials. The mixing of amorphous rubber into LDPE resulted LDPE, a semi-crystal material, to have better resiliency. Seven LDPE/EPR blends with different EPR contents ranging from 0 to 100 weight percent were foamed. The microcellular morphology of the foam was investigated using a scanning electron microscope. The effects of decomposition promoter on chemical blowing agent were measured via thermo-gravimetric analysis. The density, tensile strength, elongation at break, compressive strength and compression set of foam were according to the ASTM D-3575 procedures. The LDPE/EPR blend with a weight ratio of 70/30 and a gel fraction ranging from 30% to 50% was found to be an optimum condition for making foam materials.