Preparation of linear low-density polyethylene by the In situ copolymerization of ethylene with an iron oligomerization catalyst and rac-ethylene bis(indenyl) zirconium (IV) dichloride
文献类型：期刊论文
| 作者 | Zhang, ZC; Cui, NN; Lu, YY; Ke, YC; Hu, YL |
| 刊名 | JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
 |
| 出版日期 | 2005-03-01 |
| 卷号 | 43期号:5页码:984-993 |
| 关键词 | Alpha-olefins Branching Degrees Copolymerization In Situ Copolymerization Linear Low-density Polyethylene Oligomers Polyethylene (Pe) |
| ISSN号 | 0887-624X |
| DOI | 10.1002/pola.20560 |
| 英文摘要 | An iron oligomerization catalyst, [(2-ArN C(Me))(2)C5H3N]FeCl2 [Ar = 2,6-C6H3(F)(2)], was combined with rac-ethylene bis(indenyl)zirconium (IV) dichloride [rac-Et(Ind)(2)ZrCl2] to prepare linear low-density polyethylene (LLDPE) by the in situ copolymerization of ethylene. A series of LLDPEs with different properties were prepared by the alteration of the reaction temperature, Fe/Zr molar ratio, Al/(Fe + Zr) molar ratio, and reaction time. The structures of the polymers were characterized with differential scanning calorimetry, C-13 NMR, gel permeation chromatography (GPC), and so forth. The melting points, crystallizations, and densities of the resulting products increased, and the average branching degree decreased, as the reaction temperature, Al/(Fe + Zr) ratio, and reaction time increased. The melting points, crystallizations, and densities of the polymers decreased, and the average branching degree increased, when the Fe/Zr ratio increased. The C-13 NMR and GPC results showed that there were no unreacted alpha-olefins remaining in the resulting polymers because the percentage of low-molar-mass sections (C-4-C-10) of the oligomers obtained with this catalyst was very high (>70%). In addition, the formation of polymers with two melting points under different reaction conditions was examined in detail, and the results indicated that the two melting points of the polymers could be attributed to polyethylene with different branches. (C) 2005 Wiley Periodicals, Inc. |
| 语种 | 英语 |
| WOS记录号 | WOS:000227015300006 |
| 出版者 | JOHN WILEY & SONS INC |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/56303]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Hu, YL |
| 作者单位 | 1.Chinese Acad Sci, Inst Chem, Key Lab Engn Plast, Joint Lab Polymer Sci & Mat, Beijing 100080, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, ZC,Cui, NN,Lu, YY,et al. Preparation of linear low-density polyethylene by the In situ copolymerization of ethylene with an iron oligomerization catalyst and rac-ethylene bis(indenyl) zirconium (IV) dichloride[J]. JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY,2005,43(5):984-993. |
| APA | Zhang, ZC,Cui, NN,Lu, YY,Ke, YC,&Hu, YL.(2005).Preparation of linear low-density polyethylene by the In situ copolymerization of ethylene with an iron oligomerization catalyst and rac-ethylene bis(indenyl) zirconium (IV) dichloride.JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY,43(5),984-993. |
| MLA | Zhang, ZC,et al."Preparation of linear low-density polyethylene by the In situ copolymerization of ethylene with an iron oligomerization catalyst and rac-ethylene bis(indenyl) zirconium (IV) dichloride".JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY 43.5(2005):984-993. |
入库方式： OAI收割
来源：化学研究所
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