DQC-602型催化剂的时间依赖性研究  

Time dependence of DQC-602 catalyst

作　　者：齐琳[1] 张纪贵[1] 王宇[1] 张天一[1] Qi Lin;Zhang Jigui;Wang Yu;Zhang Tianyi(Beijing Research Institute of Chemical Industry, SINOPEC, Beijing 100013, China)

机构地区：[1]中国石油化工股份有限公司北京化工研究院,北京市100013

出　　处：《合成树脂及塑料》2017年第3期19-22,共4页China Synthetic Resin and Plastics

摘　　要：以DQC-602型催化剂为主催化剂,三乙基铝为助催化剂,环己基甲基二甲氧基硅烷为外给电子体,采用高通量产品开发反应器技术进行丙烯本体聚合,考察了聚合时间对聚丙烯性能的影响。结果表明:随着聚合时间从30 min增加到120 min,所制聚丙烯的重均分子量下降,数均分子量不变,相对分子质量分布变窄,聚丙烯的等规指数不变,熔体流动速率由24.7 g/10 min增长到32.4 g/10 min,聚丙烯的结晶度由43.8%增加到47.5%,并形成了更多具有更高有序性的α_2晶。Propylene bulk polymerization was carried out in high throughout product developmentreactor with DQC-602catalyst as main catalyst,tri-ethyl aluminum as cocatalyst and cyclohexyl methyl dimethoxylsilaneas external electron donor.The effects of polymerization time on properties of the polypropylene(PP)produced were observed.The results show that when the polymerization time increases from30min to120min,the weight average molecular weight of PP decreases,while the molecular weight distribution narrows downand the number average molecular weight keeps stable.The isotacticity of PP is unchanged,the melt flow rate ofPP rises from24.7g/10min to32.4g/10min.The crystallinity of the product goes up from43.8%to47.5%andmoreα2-form well-ordered crystals are formed.

关 键 词：丙烯聚合 齐格勒-纳塔催化剂 时间依赖性 产品开发反应器技术 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]