甚高温度下热氧处理聚丙烯形态和力学性能研究  

Study on Morphology and Mechanical Properties of Polypropylene Treated by Thermo-oxidative at Very High Temperature

作　　者：王晓[1,2] 王辉[1,2] 苏启标[1] 陈斯榆[1,2] 陈国帅[1,2] 

机构地区：[1]中山大学化学与化学工程学院,聚合物复合材料及功能材料教育部重点实验室,广东广州510275 [2]中山大学化学与化学工程学院,新型聚合物材料设计合成与应用广东省高校重点实验室,广东广州510275

出　　处：《中国塑料》2011年第6期54-59,共6页China Plastics

基　　金：广东省科技计划资助项(2009B011200004);广东省经贸委计划资助项目(200921526)

摘　　要：研究了150℃下聚丙烯(PP)膜片的耐热性能和热氧降解行为,结果表明,在经过8 d的热氧老化处理之后,PP发生了显著的热氧降解,但是,降解程度非常不均匀,有些试样降解程度很严重,无法进行力学性能测试,但有些试样还基本保留完好,具有相当好的力学性能;在一些试样内,一些区域热氧降解程度很大,出现严重发黄现象;而在同一试样的其他部分,则还保留较好的抗拉和抗弯性能。在这种热氧老化处理条件下,力学性能的可测试样所占的比例只有32.2%,但可测试样的拉伸屈服应力老化系数达到93.3%,拉伸强度老化系数也达到79.6%。The behavior of thermo-oxidative degradation and heat resistance of poly-propylene（Pp）film while treated at 150 ~C. After 8 days of thermo-oxidative treatment, significant thermo-oxidative degradation of the PP film was observed. However, the behavior of thermo-oxidative degradation of the samples was diverse. Some of the samples became degraded seriously so that they were incapable of measuring in mechanical properties, whereas some remained relatively integrated in shape. After the thermo-oxidative treating, the percent of the mechanically-measurable sample was 32. 2 %, but the ageing coefficients of yield stress and tensile strength were 93.3%and 79.6%, respectively.

关 键 词：聚丙烯 热氧降解 力学性能 形态 甚高温度 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]