抗冲共聚聚丙烯的组成、结构与性能  

Composition,Structure and Properties of Impact Propylene Copolymer

作　　者：刘小燕 陈旭 冯颜博 贾军纪 张长军 

机构地区：[1]中国石油兰州化工研究中心,甘肃兰州730060

出　　处：《石油化工》2013年第1期30-33,共4页Petrochemical Technology

基　　金：中国石油天然气集团公司资助项目(2011B-2703-0103)

摘　　要：采用溶剂分级法、黏度法、POM、SEM和DMA等方法对两种抗冲共聚聚丙烯(PPc-A和PPc-B)的分级级分、黏度、晶态结构以及分散相与基体的相容性等进行了研究。分级和黏度分析结果表明,两种共聚聚丙烯中均含乙丙无规共聚物、结晶性乙丙共聚物(BC)和等规聚丙烯(iPP)级分;由于BC在PPc-A中的含量较在PPc-B中高,且PPc-B中橡胶相与基体的黏度差较大,因此虽然两者力学性能接近,但PPc-A的断裂伸长率优于PPc-B。POM,SEM,DMA表征结果显示,PPc-A中的BC可结晶的链段少,晶片尺寸小;PPc-A淬断面中的橡胶相的尺寸较大,橡胶相的均匀程度也高于PPc-B;PPc-A中的橡胶相与iPP基体的相容性好于PPc-B。The fraction, viscosity, crystal structure and the compatibility between the disperse phases and the matrixes of two impact propylene copolymers（PPc-A and PPc-B） were studied by means of solvent fractionation, viscosity analysis, POM, SEM and DMA. The results of the fractionation and viscosity analysis indicate that both PPc-A and PPc-B contain fractions of ethylene-propylene random copolymer, crystalline ethylene-propylene copolymer（BC） and isotactic polypropylene（iPP）. The elongation at break of PPc-A is much better than that of PPc-B because the higher amount of BC in PPc-A and the larger viscosity difference between the rubber phase and matrix in PPc-B, even though the mechanical properties of PPc-A are similar to those of PPc-B. The characterization results of POM, SEM and DMA show that PPc-A contains fewer and smaller crystallizable segments of BC; the rubber phase in the quenching surface of PPc-A has a bigger size and better uniformity; and the compatibility of the rubber phase and iPP matrix in PPc-A is better.

关 键 词：抗冲共聚聚丙烯 分级 断裂伸长率 相容性 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]