超高分子量聚乙烯定伸应力测试  

Elongation Stress Test for Ultra High Molecular Weight Polyethylene

作　　者：沈贤婷[1] 张炜[1] 夏晋程[1] 冯玲英[1] 

机构地区：[1]上海市聚烯烃催化技术重点实验室,上海化工研究院,上海200062

出　　处：《工程塑料应用》2014年第11期81-84,共4页Engineering Plastics Application

基　　金：上海市科学技术委员会项目(13DZ0502000)

摘　　要：建立准确的超高分子量聚乙烯（PE-UHMW）定伸应力性能测试方法。该方法需在试样制备阶段添加质量分数为0.2%～0.8%的抗氧剂以减少分子链交联，使得定伸应力实验能够顺利开展。对相同特性的PE-UHMW，定伸应力随其分子量的增大而增大；分子量相同时，流动改性的PE-UHMW定伸应力小；相同分子量时，分子量分布窄的定伸应力大。定伸应力是表征PE-UHMW流动性的较好方法。A method of testing the elongation stress of ultra high molecular weight polyethylene （PE-UHMW） was established. This method was carried out via adding the mass fraction of 0.2%～0.8% antioxidants into PE-UHMW to prevent the cross linked polymer chains. It can be seen that elongation stress of PE-UHMW is improved with the increasing molecular weight of that. The flowability modified PE-UHMW has lower elongation stress than the one not been modified when their molecular weight are in the same level. What is more,PE-UHMW with the narrower molecular weight distribution also perform a higher elongation stress when the molecular weight of PE-UHMW is kept at the same level. The elongation stress test is a well method to perform the flowability of PE-UHMW.

关 键 词：超高分子量聚乙烯 定伸应力 抗氧剂 测试 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]