The effect of the mixed external donors on the sequence length distribution of polypropylene
文献类型：期刊论文
| 作者 | Chang, Hefei1; Ren, Shitong1; Dang, Xiaofei2; Zhang, Liaoyun1; Li, Huayi2; Hu, Youliang2 |
| 刊名 | JOURNAL OF APPLIED POLYMER SCIENCE
 |
| 出版日期 | 2013-08-05 |
| 卷号 | 129期号:3页码:1026-1035 |
| 关键词 | Polyolefins Differential Scanning Calorimetry (Dsc) Properties And Characterization |
| ISSN号 | 0021-8995 |
| DOI | 10.1002/app.38762 |
| 英文摘要 | The effects of different mixed external donors on the crystallization behavior and sequence length distribution of polypropylene prepared by MgCl2-supported TiCl4 ZieglerNatta catalyst were studied through successive self-nucleation and annealing (SSA) technique. The SSA results show that the crystallization ability and the relative contents of long isotactic sequence length gradually increase with the increase of the relative component of Donor-1 (cyclohexylmethyldimethoxysilane, dicyclohexyl(dimethoxy)silane, and dipiperidinedimethoxysilane) in the different mixed external donors when the ratio of the mixed external donors/Ti (Si/Ti) is unchanged. The thickness distribution of lamellar also becomes broader, indicating the sequence length distribution of polypropylene gets broader. The crystallization ability and the relative contents of long isotactic sequence length of polypropylene prepared by the mixed cyclohexylmethyldimethoxysilane and n-propyltriethoxysilane (CN) external donors are lowest. However, the effect of the mixed dicyclohexyl(dimethoxy)silane and n-propyltriethoxysilane (HN) and the mixed dipiperidinedimethoxysilane and n-propyltriethoxysilane (PyN) external donors on the crystallization ability and sequence length of polypropylene are more significantly. Especially, the relative content of long isotactic sequence length increases sharply from 0.2 to 27.5% in the polypropylene chain of sample prepared by the mixed PyN external donors when the proportion of Donor 1 is running up to 90%. (c) 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013 |
| 语种 | 英语 |
| WOS记录号 | WOS:000318504500010 |
| 出版者 | WILEY-BLACKWELL |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/46485]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Zhang, Liaoyun |
| 作者单位 | 1.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Beijing Natl Lab Mol Sci, CAS Key Lab Engn Plast, Inst Chem, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chang, Hefei,Ren, Shitong,Dang, Xiaofei,et al. The effect of the mixed external donors on the sequence length distribution of polypropylene[J]. JOURNAL OF APPLIED POLYMER SCIENCE,2013,129(3):1026-1035. |
| APA | Chang, Hefei,Ren, Shitong,Dang, Xiaofei,Zhang, Liaoyun,Li, Huayi,&Hu, Youliang.(2013).The effect of the mixed external donors on the sequence length distribution of polypropylene.JOURNAL OF APPLIED POLYMER SCIENCE,129(3),1026-1035. |
| MLA | Chang, Hefei,et al."The effect of the mixed external donors on the sequence length distribution of polypropylene".JOURNAL OF APPLIED POLYMER SCIENCE 129.3(2013):1026-1035. |
入库方式： OAI收割
来源：化学研究所
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