配方与工艺因素对EPDM模压发泡材料性能的影响

Effect of formulation and processing technology on properties of moulded EPDM foam

研究了发泡剂H在EPDM模压发泡材料中的发泡特性、硫化特性以及两者之间的匹配关系对发泡效果的影响 ,同时还考察了配方和工艺因素对发泡体性能的影响。结果表明 ,为了获得较高的发泡率和良好的发泡质量 ,应选择硫化诱导期与发泡剂完全分解时间相当的硫化体系 ;一次硫化的硫化程度决定着胶料出模时的膨胀 ;二次硫化的发泡材料收缩率较小 ;高填充时粒径较大的填料对发泡效果的影响较小。

The blowing and vulcanizing characteristics of moulded EPDM foam with blowing agent H,and the effect of the formulation and processing technology on the foam properties were investiga ted.The results showed that the curing system with the induction period equivalent to the complete decomposition time of blowing agent should have been chosen to obtain higher blowing capacity and better blowing quality;the mould release swell of foam depended on the curing state after first cure;the foam shrinkage was small on the post cure;the filler with high loading level and large particle size had little effect on the blowing capacity.