Variations of regular conformation structures in melt of syndiotactic polypropylene
文献类型：期刊论文
| 作者 | Zheng, Chunxiao; Zhang, Xiuqin; Dong, Xia; Zhao, Ying; Wang, Zhigang; Zhu, Shannong; Xu, Duanfu; Wang, Dujin |
| 刊名 | POLYMER
 |
| 出版日期 | 2006-10-18 |
| 卷号 | 47期号:22页码:7813-7820 |
| 关键词 | Syndiotactic Polypropylene Melt State Regular Conformation Structure |
| ISSN号 | 0032-3861 |
| DOI | 10.1016/j.polymer.2006.09.005 |
| 英文摘要 | Regular structures in polymer melt play important roles during crystallization and subsequently influence performances of polymer materials. In the present work, differential scanning calorimetry (DSC) and variable temperature Fourier transform infrared spectroscopy (VT-FTIR) were used to characterize the variations of regular structures in melt of syndiotactic polypropylene (sPP) during heating. It was found that during heating, the structural transition in sPP melt undergoes four stages: (1) destruction of long regular structures; (2) formation of short regular structures; (3) transition from short regular structures to isotropic state; and (4) isotropic state. These regular structures in sPP melt have distinct memory effects on the crystallization behaviors. By using Flory's RIS model, it was found that in final isotropic state, the most common conformers are ttgg and tttt, corresponding to helical and planar-zigzag conformations, respectively. These findings are helpful to deeply understand the essence of structures in sPP melt and microstructure variations during melting. (c) 2006 Elsevier Ltd. All rights reserved. |
| 语种 | 英语 |
| WOS记录号 | WOS:000241608600025 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/60065]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Wang, Dujin |
| 作者单位 | 1.Chinese Acad Sci, Natl Lab Mol Sci, Key Lab Engn Plast, Beijing 100080, Peoples R China 2.Chinese Acad Sci, State Key Lab Polymer Phys & Chem, Joint Lab Polymer Sci & Mat, Inst Chem, Beijing 100080, Peoples R China 3.Chinese Acad Sci, Grad Sch, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zheng, Chunxiao,Zhang, Xiuqin,Dong, Xia,et al. Variations of regular conformation structures in melt of syndiotactic polypropylene[J]. POLYMER,2006,47(22):7813-7820. |
| APA | Zheng, Chunxiao.,Zhang, Xiuqin.,Dong, Xia.,Zhao, Ying.,Wang, Zhigang.,...&Wang, Dujin.(2006).Variations of regular conformation structures in melt of syndiotactic polypropylene.POLYMER,47(22),7813-7820. |
| MLA | Zheng, Chunxiao,et al."Variations of regular conformation structures in melt of syndiotactic polypropylene".POLYMER 47.22(2006):7813-7820. |
入库方式： OAI收割
来源：化学研究所
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