The influence of combined external donor and combined cocatalyst on propylene polymerization with a MgCl2-supported Ziegler-Natta catalyst in the presence of hydrogen

被引：10
作者：
Li, Peiyuan [1 ]
Tu, Songtao [1 ,2 ]
Xu, Tao [1 ]
Fu, Zhisheng [1 ]
Fan, Zhiqiang [1 ]
机构：
[1] Zhejiang Univ, Dept Polymer Sci & Engn, MOE Key Lab Macromol Synth & Functionalizat, Hangzhou 310027, Peoples R China
[2] SINOPEC Yangzi Petrochem Co Ltd, Nanjing Res Inst, SINOPEC Beijing Inst Chem Ind Yangzi Branch, Nanjing 210048, Jiangsu, Peoples R China
来源：
JOURNAL OF APPLIED POLYMER SCIENCE | 2015年 / 132卷 / 12期
关键词：
catalysts; polyolefins; synthesis and processing; IN-REACTOR ALLOYS; PROPENE POLYMERIZATION; ELECTRON-DONORS; ACTIVE-CENTERS; ETHYLENE; POLYPROPYLENE; TITANIUM; COPOLYMERIZATION; MICROSTRUCTURE;
D O I：
10.1002/app.41689
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
The influence of combined external donor (ED) (diphenyldimethoxysilane/dicyclopentyldimethoxysilane) and combined cocatalyst (triethylaluminum/triisobutylaluminum) on propylene polymerization with MgCl2-supported Ziegler-Natta catalyst in the presence of hydrogen was investigated. By deconvolution analysis of the molecular weight distribution (MWD) into multiple Flory components, the influence of ED and cocatalyst on the active center distribution of the catalyst was demonstrated, and the mechanism was discussed. Using combined cocatalyst and combined donor, iPP with high molecular weight, high isotacticity index, and broad MWD can be obtained. (c) 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41689.
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页数：8
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