Kinetics pathway in the phase separation and crystallization of iPP/OBC blends

doi:10.1016/j.polymer.2013.05.050

CORC > 化学研究所 > 中国科学院化学研究所

	Kinetics pathway in the phase separation and crystallization of iPP/OBC blends
	Jin, Jing 1,2; Chen, Hongyu 3; Muthukumar, M.4; Han, Charles C.2
刊名	POLYMER
	2013-07-08
卷号	54 期号:15 页码:4010-4016
关键词	Crystallization Kinetics Polyolefin Blends Linear Growth Rate
ISSN号	0032-3861
DOI	10.1016/j.polymer.2013.05.050
英文摘要	Mesophase separation between the incompatible blocks in multiblock copolymers OBC (Olefin Block Copolymers), coupled with the macrophase separation in its blends with iPP (isotactic polypropylene), makes iPP/OBC a unique blend system to understand the interaction between multiple phase separations and the subsequent or simultaneous crystallization in multi-scales. The role played by OBC content as well as its molecular structure on phase morphology and crystallization kinetics in blends of iPP/OBC has been investigated systematically to demonstrate synergistic coupling between thermodynamics and kinetics. The total isothermal crystallization rate, nucleation density (the nuclei number per unit volume) and linear growth rate of iPP are found to be composition and component dependent, which can be attributed to the interplay among the enhanced mobility due to the presence of a more mobile component (lower glass transition temperature and lower melting temperature) serving as an "accelerant", the associated composition dependent inter-diffusion coefficient, and the obstruction effect caused by the OBC aggregates with increasing the diluent concentration. Furthermore, the distinct phase separation morphology determined by the compatibility between iPP and various OBC influenced the growth rate of iPP spherulite as well. (c) 2013 Elsevier Ltd. All rights reserved.
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000321538000028
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/54429]
专题	中国科学院化学研究所
通讯作者	Han, Charles C.
作者单位	1.Chinese Peoples Armed Police Force Acad, Dept Fire Protect Engn, Langfang 065000, Peoples R China 2.Chinese Acad Sci, State Key Lab Polymer Phys & Chem, Joint Lab Polymer Sci & Mat, Inst Chem, Beijing 100190, Peoples R China 3.Dow Chem Co Ltd, Shanghai 201203, Peoples R China 4.Univ Massachusetts, Amherst, MA 01003 USA
推荐引用方式 GB/T 7714	Jin, Jing,Chen, Hongyu,Muthukumar, M.,et al. Kinetics pathway in the phase separation and crystallization of iPP/OBC blends[J]. POLYMER,2013,54(15):4010-4016.
APA	Jin, Jing,Chen, Hongyu,Muthukumar, M.,&Han, Charles C..(2013).Kinetics pathway in the phase separation and crystallization of iPP/OBC blends.POLYMER,54(15),4010-4016.
MLA	Jin, Jing,et al."Kinetics pathway in the phase separation and crystallization of iPP/OBC blends".POLYMER 54.15(2013):4010-4016.