Effect of crystallization temperature and propylene sequence length on the crystalline structure of propylene-ethylene random copolymers
文献类型：期刊论文
| 作者 | Gou QingQiang1,2; Li HuiHui1,2; Yu ZhenQiang3; Chen ErQiang3; Zhang YuDong4; Yan ShouKe1,2 |
| 刊名 | CHINESE SCIENCE BULLETIN
 |
| 出版日期 | 2008-06-01 |
| 卷号 | 53期号:12页码:1804-1812 |
| 关键词 | Propylene-ethylene Random Copolymer Crystallization Dsc Waxd Afm |
| ISSN号 | 1001-6538 |
| DOI | 10.1007/s11434-008-0252-2 |
| 英文摘要 | Crystallization behavior and resultant crystalline structure of a series of temperature-rising elution-fractionated specimen of a Ziegler-Natta catalyst-synthesized propylene-ethylene random copolymer were studied by DSC, WAXD and AFM. The experimental results indicate that both crystallization temperature and propylene sequence length exhibit great influence on the crystallization behavior and crystalline structure of the copolymer. It was found that the ethylene co-monomers acting as point defects inserted into the polypropylene chains play an important role in the formation of gamma-iPP. As the co-monomer content increases, the crystallizable sequence length of iPP decreases, which produces an appropriate condition for its gamma crystallization. At the same time, the existence of chain defects leads to a lower crystallinity of the copolymer and imperfection of the resultant crystals. For each individual sample with certain propylene sequence length or ethylene content, the increment of gamma-iPP crystal content with increasing crystallization temperature demonstrates that higher crystallization temperature is in favor of the gamma-iPP crystallization. Pure gamma-iPP crystals have been got in samples with propylene sequence length lower than 21 under suitable crystallization conditions. |
| 语种 | 英语 |
| WOS记录号 | WOS:000256963000005 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/63765]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Yan ShouKe |
| 作者单位 | 1.Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Beijing 100080, Peoples R China 2.Chinese Acad Sci, Inst Chem, State Key Lab Polymer Phys & Chem, Beijing 100080, Peoples R China 3.Peking Univ, Dept Polymer Sci, Sch Chem, Beijing 100871, Peoples R China 4.SINOPEC, Beijing Res Inst Chem Ind, Beijing 100013, Peoples R China |
| 推荐引用方式 GB/T 7714 | Gou QingQiang,Li HuiHui,Yu ZhenQiang,et al. Effect of crystallization temperature and propylene sequence length on the crystalline structure of propylene-ethylene random copolymers[J]. CHINESE SCIENCE BULLETIN,2008,53(12):1804-1812. |
| APA | Gou QingQiang,Li HuiHui,Yu ZhenQiang,Chen ErQiang,Zhang YuDong,&Yan ShouKe.(2008).Effect of crystallization temperature and propylene sequence length on the crystalline structure of propylene-ethylene random copolymers.CHINESE SCIENCE BULLETIN,53(12),1804-1812. |
| MLA | Gou QingQiang,et al."Effect of crystallization temperature and propylene sequence length on the crystalline structure of propylene-ethylene random copolymers".CHINESE SCIENCE BULLETIN 53.12(2008):1804-1812. |
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。