反应挤出微交联聚丙烯的熔体和力学性能研究  

Study on Melt and Mechanical Properties of Slightly Cross-linked PP Prepared by Reactive Extrusion

作　　者：王益龙[1] 杨威[1] 王宁[1] Wang Yilong,Yang Wei,Wang Ning(Dept of Polymer Materials,Dalian University of Technology,Dalian 116024,Chin)

机构地区：[1]大连理工大学化工学院高分子材料系

出　　处：《塑料科技》2018年第4期58-62,共5页Plastics Science and Technology

摘　　要：以过氧化二异丙苯（DCP）为引发剂、二乙烯基苯（DVB）为交联剂,通过反应挤出对聚丙烯（PP）进行微交联改性,并考察了改性效果。结果表明：DCP是最佳的PP微交联引发剂,当其加入量仅为0.04%时,即能使DVB（用量0.5%）与PP发生微交联反应,生成0.51%的凝胶,使产物的熔体强度比原料提高4倍,结晶度和维卡软化温度也有一定程度的提升,同时,产物中有少量β晶生成,使其力学性能有所改善。The slightly cross-linked polypropylene （PP） was prepared by reactive extrusion, with dicumyl peroxide （DCP） as initiator, divinylbenzne （DVB） as cross-linker, then the modification effect was investigated. The results show that DCP is the optimal initiator for the slightly cross-linking reaction of PP. When the adding dosage of DCP and DVB are 0.04% and 0.5% respectively, 0.51% cross-linked gel produces in the product, and the melt strength of the cross-linked product is 4 times than that of raw PP. Moreover, p-crystal has formed in the product, and the crystallinity, Vicat softening temperature and mechanical properties of the product increase.

关 键 词：聚丙烯 改性 力学性能 反应挤出 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]