石油化工2017，Vol.46Issue(2)：190-195,6.DOI:10.3969/j.issn.1000-8144.2017.02.008
DQS-1催化剂的丙烯聚合性能研究
The propylene polymerization with the DQS-1 catalyst
摘要
Abstract
Propylene polymerization was carried out with the DQS-1 catalyst as the main catalyst, four different organic compounds,namely cyclohexyl methyl dimethoxy silane(CHMMS), dicyclopentyl dimethoxy silane(DCPMS),diisobutyl dimethoxy silane(DIBMS) and diisopropyl dimethoxy silane(DIPMS)) as the external electron donors. The influences of molar ratio of Al to Si,hydrogen content and polymerization time on the performances of the DQS-1 catalyst in the propylene polymerization were investigated,specially,the propylene bulk polymerization at different polymerization temperature and the ethylene-propylene copolymerization with the DQS-1/CHMMS catalyst system for impact copolymer were studied. The results indicated that,the DQS-1catalyst had high stereospecificity and good hydrogen response at the same time when CHMMS or DIPMS was used as the external electron donor,its activity decay rate was significantly lower than that of the DQC catalyst;with the polymerization temperature rise,both the activity of the DQS-1 catalyst and the isotacticity of the polypropylene products increased,the polypropylene products still had high melt index. It was showed that the performances of the DQS-1 catalyst were higher in the ethylene-propylene copolymerization than those of the DQC-602 catalyst,with 30％ higher both ethylene content and rubber phase content in the products.关键词
DQS-1催化剂/丙烯聚合/活性衰减/抗冲乙丙共聚物Key words
DQS-1 catalyst/propylene polymerization/activity decay/impact ethylene-propylene copolymer分类
化学化工引用本文复制引用
张纪贵,夏先知,刘月祥,张天一,高富堂,齐琳..DQS-1催化剂的丙烯聚合性能研究[J].石油化工,2017,46(2):190-195,6.基金项目
中国石化资助项目(410018). （410018）
