摘要
采用具有可控颗粒形态的蒙脱土(MMT)负载Ziegler-Natta催化剂,进行连续的丙烯均聚反应和乙烯/丙烯气相共聚反应,以聚合反应参数调控树脂组成,制备了纳米MMT增强的三元抗冲共聚聚丙烯(PP)(EPR&MMT@PP)树脂。考察了EPR&MMT@PP树脂的相形态、熔融/结晶性能、热稳定性和力学性能。实验结果表明,MMT在聚合过程中片层得到剥离,MMT的引入稳定了乙丙橡胶(EPR)的分散微区尺度;纳米MMT对EPR&MMT@PP树脂显示出结晶成核能力和有效的纳米效应,与普通抗冲共聚合金(EPR@PP)树脂相比,EPR&MMT@PP树脂的熔融温度、结晶温度和热分解温度均提高;纳米MMT进一步促进了EPR&MMT@PP树脂中EPR组分对PP基体的增韧作用。
Homopolymerization of propylene and copolymerization of ethylene and propylene were carried out successively with montmorillonite（MMT）-supported Ziegler-Natta catalyst in which MMT had controllable granular morphology, and nano-MMT reinforced ternary impact polypropylene（PP） copolymer resins（EPR＆MMT@PP） were synthesized. The phase state, melting/crystallization behavior, thermal stability and mechanical properties of EPR＆MMT@PP were investigated. The layers of MMT were delaminated in the propylene polymerization and then the nano-dispersed MMT was introduced into the copolymers, which showed a stabilizing effect for the EPR domains. In comparison with the commercial impact copolymer（EPR@PP）, EPR＆MMT@PP exhibited high melting temperature, crystallizing temperature and thermal decomposition temperature as well as the nucleating effect of MMT for PP melt crystallization. It was indicated that nano MMT could enhance the toughening effect of EPR for the PP matrix.
出处
《石油化工》
CAS
CSCD
北大核心
2014年第7期748-753,共6页
Petrochemical Technology
