Crystallization Behavior and Crystallization Kinetic Studies of Isotactic Polypropylene Modified by Long-Chain Branching Polypropylene
文献类型：期刊论文
| 作者 | Ni, Qing-Lin1,2; Fan, Jia-Qi1; Dong, Jin-Yong1 |
| 刊名 | JOURNAL OF APPLIED POLYMER SCIENCE
 |
| 出版日期 | 2009-11-15 |
| 卷号 | 114期号:4页码:2180-2194 |
| 关键词 | Blends Branched Crystallization Polypropylene (Pp) |
| ISSN号 | 0021-8995 |
| DOI | 10.1002/app.30363 |
| 英文摘要 | In this article, we discuss the crystallization behavior and crystallization kinetics of isotactic polypropylene (iPP) modified by long-chain-branching (LCB) high-melt-strength iPP over a wide composition range, that is, LCB-iPP from 10 to 50 wt %. Over the entire range we investigated, the presence of LCB-iPP accelerated crystallization in both the isothermal crystallization process and nonisothermal crystallization process, even when the LCB-iPP content was as low as 10%, and both crystallization processes were enhanced more significantly as the LCB-iPP content increased. Hoffman-Lauritzen theory analysis revealed that the fold-free energy decreased effectively with the occurrence of the LCB structure, although the growth rate of spherulites was depressed, as shown by polarized optical microscopy. Meanwhile, the regime III-regime 11 transition temperature was about 15 degrees higher for all of the LCB-iPP compositions than that of iPP because the LCB structure reduced the mobility of the polypropylene chains. Furthermore, the gamma-form crystal structure was favored by LCB compared to the beta form, which was Supported by wide-angle X-ray diffraction. (C) 2009 Wiley Periodicals, Inc. J Appl Polym Sci 114: 2180-2194, 2009 |
| 语种 | 英语 |
| WOS记录号 | WOS:000270064100026 |
| 出版者 | JOHN WILEY & SONS INC |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/65795]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Dong, Jin-Yong |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Engn Plast, Joint Lab Polymer Sci & Mat, Inst Chem, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ni, Qing-Lin,Fan, Jia-Qi,Dong, Jin-Yong. Crystallization Behavior and Crystallization Kinetic Studies of Isotactic Polypropylene Modified by Long-Chain Branching Polypropylene[J]. JOURNAL OF APPLIED POLYMER SCIENCE,2009,114(4):2180-2194. |
| APA | Ni, Qing-Lin,Fan, Jia-Qi,&Dong, Jin-Yong.(2009).Crystallization Behavior and Crystallization Kinetic Studies of Isotactic Polypropylene Modified by Long-Chain Branching Polypropylene.JOURNAL OF APPLIED POLYMER SCIENCE,114(4),2180-2194. |
| MLA | Ni, Qing-Lin,et al."Crystallization Behavior and Crystallization Kinetic Studies of Isotactic Polypropylene Modified by Long-Chain Branching Polypropylene".JOURNAL OF APPLIED POLYMER SCIENCE 114.4(2009):2180-2194. |
入库方式： OAI收割
来源：化学研究所
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