近熔点挤出等规聚丙烯的微结构与力学性能的关系  

The Relationship Between Micro-structure and Mechanical Properties of iPP Extruded in Near Melt Point

作　　者：赵元旭[1] 刘忠柱[1] 郑海丽[1] 郑国强[1] 刘春太[1] 

机构地区：[1]郑州大学材料科学与工程学院材料成型及模具教育部重点实验室,河南郑州450001

出　　处：《上海塑料》2013年第3期35-38,共4页Shanghai Plastics

摘　　要：分别在近熔点附近(167℃)和完全熔融温度(190℃)下挤出制备等规聚丙烯(iPP)片材。拉伸试验结果表明:在167℃挤出的iPP,其屈服强度比在190℃时挤出的提高了15.8%;拉伸强度和杨氏模量均有一定程度的提高。采用二维广角X射线衍射(2D-WAXD)、示差扫描量热法(DSC)和扫描电子显微镜(SEM)对微结构进行表征,并讨论了微结构与力学性能的关系。The extruded iPP sheet was prepared at near melt point （167℃） and completeiy melted tem- perature （190℃）, respectively. The tensile test results showed that the yield strength of iPP which processed at the near melt point（167℃） increased hy 15.8% than that processed at the completely melt temperature （190℃）. Tensile strength and Young＇s modulus had also increased. The microstructure of two iPP sheets were characterized by two-dimensional wide-angle X-ray diffraction （2D-WAXD）, differ- ential scanning calorimetry （DSC） and scanning electron microscopy （SEM）, and the relationship be- tween microstructure and mechanical properties was discussed.

关 键 词：等规聚丙烯 力学性能 熔点 微结构 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]