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	Crystallization behavior and crystallization kinetic studies of isotactic polypropylene modified by long-chain branching polypropylene
	Ni, Qing-Lin1,2; Fan, Jia-Qi1; Dong, Jin-Yong1
刊名	Journal of applied polymer science
	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
出版者	JOHN WILEY & SONS INC
WOS记录号	WOS:000270064100026
内容类型	期刊论文
URI标识	http://www.corc.org.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.

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