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 |
| 通讯作者 | Dong, jin-yong(jydong@iccas.ac.cn) |
| 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 |
| WOS关键词 | ELECTRON-BEAM IRRADIATION ; REACTIVE EXTRUSION ; FLOW PROPERTIES ; MELT ; TEMPERATURE ; BLENDS ; GROWTH ; PHASE ; SHEAR |
| WOS研究方向 | Polymer Science |
| WOS类目 | Polymer Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000270064100026 |
| 出版者 | JOHN WILEY & SONS INC |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2393880 |
| 专题 | 中国科学院大学 |
| 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： iSwitch采集
来源：中国科学院大学
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。