聚乙烯支化度的检测及性能分析  

Detection and properties of branched PE

作　　者：李小梅 吴春山 Li Xiaomei;Wu Chunshan(Ya′an Vocational and Technical College,Ya′an 625000,China;Chongqing University,Chongqing 400044,China)

机构地区：[1]雅安职业技术学院,四川省雅安市625000 [2]重庆大学,重庆市400044

出　　处：《合成树脂及塑料》2020年第6期60-63,共4页China Synthetic Resin and Plastics

摘　　要：分析了3种聚乙烯的结构与性能。结果表明:PE-1为线型聚乙烯;PE-2,PE-3为支化聚乙烯,支化度分别为0.83%,1.94%(y);PE-1的相对分子质量约为50000,而PE-2和PE-3的相对分子质量均低于50000;随着支化度的增加,PE-1,PE-2,PE-3的熔点和焓变依次降低;随着支化度增加,聚乙烯的结晶度、机械强度下降,断裂拉伸应变提高。The structure and properties of three kinds of polyethylene(PE)were tested and analyzed.The results show that PE-1 is linear polyethylene,PE-2 and PE-3 are branched polyethylene,whose branching degrees are 0.83%and 1.94%respectively.The relative molecular mass of PE-1 is about 50000,while those of PE-2 and PE-3 are lower than 50000.The melting point and enthalpy of PE-1,PE-2 and PE-3 are decreased with the increase of their branching degree.The crystallinity and mechanical properties of PE decrease with the degree of branching increasing,while their elongation at break increase.

关 键 词：聚乙烯 支化度 结构检测 性能分析 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]