Triethylaluminum-regulated Preparation of Catalyzed Polypropylene Alloys by Ziegler-Natta/Metallocene Composite Catalyst
文献类型：期刊论文
| 作者 | Dong, Cheng1,2; Niu, Hui1; Dong, Jin-yong1 |
| 刊名 | ACTA POLYMERICA SINICA
 |
| 出版日期 | 2014-08-20 |
| 期号 | 8页码:1143-1152 |
| 关键词 | Ziegler-natta/metallocene Composite Catalyst Catalyzed Polypropylene Alloy Reversible Deactivation Triethylaluminum |
| ISSN号 | 1000-3304 |
| 英文摘要 | A Ziegler-Natta/metallocene composite catalyst ( MgCl2/TiCl4/rac-Et ( Ind )(2)ZrCl2 ) of "reactor granule technology" characteristics is combined with a co-catalyst pair of triethylaluminum ( AlEt3, TEA ) and methyaluminoxane ( MAO ) to activate its Ti and Zr catalytic species respectively. TEA exhibits a deactivating effect on the Zr species amid propylene homopolymerization, whereas ethylene restores the deactivated species during ethylene-propylene copolymeriation. By this way, a reversible deactivation of the metallocene Zr species has been realized in the preparation of catalyzed polypropylene alloys ( propylene homopolymerization + ethylene-propylene copolymerization ) with Ziegler-Natta/metallocene composite catalyst. New catalyzed polypropylene alloys have been prepared with MgCl2/TiCl4/rac-Et ( Ind )(2)ZrCl2 composite catalyst and TEA/MAO bi-component co-catalyst, with the catalyst and co-catalyst added in one-pot. The polypropylene ( PP ) matrix is selectively produced by the Ziegler-Natta Ti species, while the ethylene-propylene copolymer ( EPR ) is accounted for in large portion by the metallocene Zr species. Compared to conventional Ziegler-Natta catalysts, the Ziegler-Natta/metallocene composite catalyst renders PP alloys with a more random sequence distribution and equally well domain distribution of EPR. This research provides a new route to the controlled preparation of catalyzed PP alloys. |
| 语种 | 英语 |
| WOS记录号 | WOS:000340351000016 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/49981]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Dong, Jin-yong |
| 作者单位 | 1.Chinese Acad Sci, Inst Chem, CAS Key Lab Engn Plast, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Dong, Cheng,Niu, Hui,Dong, Jin-yong. Triethylaluminum-regulated Preparation of Catalyzed Polypropylene Alloys by Ziegler-Natta/Metallocene Composite Catalyst[J]. ACTA POLYMERICA SINICA,2014(8):1143-1152. |
| APA | Dong, Cheng,Niu, Hui,&Dong, Jin-yong.(2014).Triethylaluminum-regulated Preparation of Catalyzed Polypropylene Alloys by Ziegler-Natta/Metallocene Composite Catalyst.ACTA POLYMERICA SINICA(8),1143-1152. |
| MLA | Dong, Cheng,et al."Triethylaluminum-regulated Preparation of Catalyzed Polypropylene Alloys by Ziegler-Natta/Metallocene Composite Catalyst".ACTA POLYMERICA SINICA .8(2014):1143-1152. |
入库方式： OAI收割
来源：化学研究所
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