热处理对聚丙烯力学性能及结晶结构的影响  

Effect of Heat Treatment on the Mechanical Property and the Crystalline Structure of PP

作　　者：杨红军[1] 伍玉娇[1] 郭建兵[1] 张敏敏[1] 朱红[1] 廖永灵[1] 胡洪娥[1] 

机构地区：[1]贵州大学材料科学与冶金工程学院

出　　处：《现代机械》2007年第3期75-76,共2页Modern Machinery

基　　金：国家863计划项目(2003AA32X230)资助;贵州省自然科学基金项目(黔科合计2004(3045)号)资助;贵州大学研究生教育创新基金项目(gzdxyjscxjjclxy200601)

摘　　要：本文研究了聚丙烯不同热处理条件下的力学性能。并用广角X衍射(WAXD)和DSC研究了热处理对聚丙烯结晶结构的影响。研究表明,随着热处理温度的升高,PP拉伸强度、弯曲强度、室温缺口冲击强度都呈现先上升后下降;而PP的结晶形态由α、β晶型转变为α晶型。The effect of various heat treatment conditions on PP mechanical properties was studied. The crystalline structure of PP before and after heat treatment was investigated by means of wide angle X-rav diffraction （WAXD）and differential scanning calorimetry （DSC） , too. The results showed that with the increase of the temperature in the heat treatment , the tensile strength, the flexural strength and the notch impact strength of PP first increased gradually , but decreased gradually. The initial α、β crystalline converted to α crystalline gradually .

关 键 词：聚丙烯 热处理 力学性能 结晶结构 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]