摘要
制备了Ziegler-Natta/茂金属(Z-M)复合催化剂,用Z-M复合催化剂采用一段丙烯本体均聚合、二段乙烯-丙烯气相共聚合制备了聚丙烯(PP)釜内合金PPc-A。与采用传统Ziegler-Natta催化剂ZN118制备的抗冲聚丙烯釜内合金SP179对比,两合金具有相近的熔体流动速率及乙烯含量,但冲击强度相差较大。对两合金试样进行了选择性溶解及扫描电子显微镜观察,结果表明:PPc-A的乙丙无规共聚物质量分数较SP179多2%左右,同时,PPc-A的橡胶相颗粒(刻蚀后孔数量)比SP179多,橡胶相的平均尺寸约为1μm,远低于SP179试样的2μm。
The authors prepared a kind of Ziegler-Natta/metallocene composite catalyst（Z-M） and then, applied the Z-M catalyst to the production of polypropylene catalloy PPc-A with the process involving one- stage propylene bulk homopolymerization and two-stage ethylene and propylene gas eopolymerization. PPc-A had a similar melt flow rate and ethylene content but quite different impact strength in comparison with high impact polypropylene catalloy SP179 prepared by traditional Ziegler-Natta catalyst ZN118. PPc-A and SP179 were characterized by classification experiments and scanning electron microscope（SEM）. The results show that the mass fraction of ethylene-propylene random copolymer in PPc-A is about 2% higher than that in SP179. Meanwhile, the amount of the rubber phase particles（the number of etch holes） of PPc-A is more than that of SP179, and the average size of rubber phase of PPc-A is 1μm, much lower than 2 μm of SP179.
出处
《合成树脂及塑料》
CAS
北大核心
2011年第6期1-3,共3页
China Synthetic Resin and Plastics
基金
国家863项目(2008AA030902)
