"Two-in-One" catalysis of broad/bimodal molecular-weight-distribution polypropylene by a combination of Ziegler-Natta and metallocene catalysts
文献类型：期刊论文
| 作者 | Dong, Cheng1,2; Niu, Hui1; Dong, Jin-Yong1 |
| 刊名 | APPLIED CATALYSIS A-GENERAL
 |
| 出版日期 | 2014-08-22 |
| 卷号 | 484页码:142-147 |
| 关键词 | Ziegler-natta Catalyst Metallocene Catalyst Molecular Weight Distribution Propylene Polymerization Polypropylene |
| ISSN号 | 0926-860X |
| DOI | 10.1016/j.apcata.2014.07.019 |
| 英文摘要 | A strategy for combining Ziegler-Natta and metallocene catalysis to synthesize broad/bimodal molecular-weight-distribution polypropylene (PP) is proposed. The chemistry is centered on a fabrication as well as utilization of a modified MgCl2/TiCl4 Ziegler-Natta catalyst with incorporated C-2-symmetric ansametallocene catalyst capable of promoting isospecific propylene polymerization. A MgCl2/TiCl4 catalyst is prepared in the presence of a 1,3-diether internal electron donor, 9,9-bis(methoxymethyl)fluorene (BMMF), which, with a porous physical architecture, is able to accommodate MAO-encapsulated and protected rac-[methylene(3-tert-butyl-1-indenyl)(2)]ZrCl2 (rac-CH2(3-t-Bu-1-Ind)(2)ZrCl2) without impairing its own composition and structure. Activation of the two-piece catalyst is found to be best conducted by pairing triisobutylaluminium (TIBA) instead of triethylaluminium (TEA) with MAO. Polymerization of propylene with TIBA-MAO-activated modified MgCl2/TiCl4 catalyst containing rac-CH2(3-t-Bu-1-Ind)(2)ZrCl2 produces broad/bimodal molecular-weight-distribution PP with tunable compositions. Moreover, reactor particles of PP thus produced are ensured with good granular morphology, which is crucial for application in modern PP industry with dominant bulk and gas polymerization processes. (C) 2014 Elsevier B.V. All rights reserved. |
| 语种 | 英语 |
| WOS记录号 | WOS:000342476700017 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/50437]  |
| 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. "Two-in-One" catalysis of broad/bimodal molecular-weight-distribution polypropylene by a combination of Ziegler-Natta and metallocene catalysts[J]. APPLIED CATALYSIS A-GENERAL,2014,484:142-147. |
| APA | Dong, Cheng,Niu, Hui,&Dong, Jin-Yong.(2014)."Two-in-One" catalysis of broad/bimodal molecular-weight-distribution polypropylene by a combination of Ziegler-Natta and metallocene catalysts.APPLIED CATALYSIS A-GENERAL,484,142-147. |
| MLA | Dong, Cheng,et al.""Two-in-One" catalysis of broad/bimodal molecular-weight-distribution polypropylene by a combination of Ziegler-Natta and metallocene catalysts".APPLIED CATALYSIS A-GENERAL 484(2014):142-147. |
入库方式： OAI收割
来源：化学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。