Fractionation and characterization for a propylene-ethylene random copolymer
文献类型：期刊论文
| 作者 | Zhang, YD; Wu, CJ; Zhu, SN |
| 刊名 | POLYMER JOURNAL
 |
| 出版日期 | 2002 |
| 卷号 | 34期号:9页码:700-708 |
| 关键词 | Elution Temperature Ethylene Content 1/k Melting Temperature Number Average Molecular Weight Sequence Length Tacticity Temperature Rising Elution Fractionation (Tref) |
| ISSN号 | 0032-3896 |
| 英文摘要 | A random copolymer of propylene with 3.5 mol% ethylene comonomer is firstly fractionated by temperature rising elution fractionation (TREF). Techniques including C-13 nuclear magnetic resonance (NMR) spectroscopy, Fourier transform infrared spectroscopy (FTIR), gel-permeation chromatography (GPC), crystallization analysis fractionation (Crystaf) and differential scanning calorimetry (DSC) are used to characterize the obtained fraction polymers. The results show that each fraction polymer is composed mainly of isotactic propylene sequence plus a small amount of ethylene comonomer and has uniform molecular weight and ethylene content. The PPP, PPE, and PEP are main part of triad sequence unit. As the elution temperature increasing, ethylene content of the fraction polymers decreases, number average molecular weight increases, and meanwhile number average sequence length of propylene, (n) over bar (p), increases, while that of ethylene, (n) over bar (E), decreases, close to 1. The results show that ethylene content affects linearly the melting temperature (T-m) in a range of ethylene content being as low as less than 10.23 mol%; there is a linear relationship between the reciprocal melting temperature (1000/T-m, K-1) and reciprocal number average molecular weight (M-n(-1)) in a range of number average molecular weight as low as less than 1.7 x 1x0(5). |
| 语种 | 英语 |
| WOS记录号 | WOS:000179765200008 |
| 出版者 | SOC POLYMER SCIENCE JAPAN |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/78313]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Zhang, YD |
| 作者单位 | 1.Beijing Res Inst Chem Ind, Natl Engn Res Ctr Polyolefin, SINOPEC, Beijing 100013, Peoples R China 2.Chinese Acad Sci, Inst Chem, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, YD,Wu, CJ,Zhu, SN. Fractionation and characterization for a propylene-ethylene random copolymer[J]. POLYMER JOURNAL,2002,34(9):700-708. |
| APA | Zhang, YD,Wu, CJ,&Zhu, SN.(2002).Fractionation and characterization for a propylene-ethylene random copolymer.POLYMER JOURNAL,34(9),700-708. |
| MLA | Zhang, YD,et al."Fractionation and characterization for a propylene-ethylene random copolymer".POLYMER JOURNAL 34.9(2002):700-708. |
入库方式： OAI收割
来源：化学研究所
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