新型Ziegler-Natta催化剂用于丙烯多段聚合制备抗冲聚丙烯  

Novel spherical Ziegler-Natta catalyst used in propylene multistage polymerization for high impact polypropylene

作　　者：姜涛[1] 陈伟[2] 赵峰[2] 刘月祥[2] 覃雪[2] 

机构地区：[1]北京化工大学材料学院,北京100029 [2]中石化北京化工研究院,北京100013

出　　处：《化工学报》2005年第12期2342-2345,共4页CIESC Journal

基　　金：国家高技术研究发展计划(2002AA333060).~~

摘　　要：The MgCl2/SiO2 complex support was prepared by spray drying using alcoholic suspension which contained MgCl2 and SiO2. The complex support reacted with TiCl4 and di-n-butyl phthalate, give the catalyst for propylene polymerization. The catalyst was spherical and porous with high specific surface area. The multistage polymerization of propylene for high impact propylene was studied with the catalyst system. It was found that the final high impact polypropylene after two stages of reaction was still freeflowing, spherical granules. Homopolypropylene with pore diameter between 100 nm and 10000 nm was suitable for EPR to fill in during ethylene-propylene copolymerization. The high impact polypropylene showed good balance between stiffness and toughness.The MgCl2/SiO2 complex support was prepared by spray drying using alcoholic suspension which contained MgCl2 and SiO2. The complex support reacted with TICl4 and di-n-butyl phthalate, give the catalyst for propylene polymerization. The catalyst was spherical and porous with high specific surface area. The multistage polymerization of propylene for high impact propylene was studied with the catalyst system. It was found that the final high impact polypropylene after two stages of reaction was still freeflowing, spherical granules. Homopolypropylene with pore diameter between 100 nm and 10000 nm was suitable for EPR to fill in during ethylene propylene copolymerization. The high impact polypropylene showed good balance between stiffness and toughness.

关 键 词：ZIEGLER-NATTA催化剂 Mg/Si载体 丙烯多段聚合 抗冲聚丙烯 

分 类 号：TQ316[化学工程—高聚物工业]