Structural and morphological development in polypropylene/poly(propylene-1-octene) in-reactor alloy due to the competition between liquid-liquid phase separation and crystallization

doi:10.1002/app.39030

CORC > 化学研究所 > 中国科学院化学研究所

	Structural and morphological development in polypropylene/poly(propylene-1-octene) in-reactor alloy due to the competition between liquid-liquid phase separation and crystallization
	Wang, Jihui 1,2; Han, Charles C.1
刊名	JOURNAL OF APPLIED POLYMER SCIENCE
	2013-09-05
卷号	129 期号:5 页码:2977-2985
关键词	Crystallization Kinetics Morphology Phase Behavior Polyolefins
ISSN号	0021-8995
DOI	10.1002/app.39030
英文摘要	Relationship between phase separation and crystallization of polypropylene/poly(propylene-1-octene) in-reactor alloy (iPP/PPOc) were studied using optical microscopy, scanning electron microscopy, and differential scanning calorimetry. Optical microscopy was used to monitor nuclei density and spherulite growth rates, providing complementary information about the effect of liquid-liquid phase separation (LLPS) on crystallization behavior. We found that LLPS process had a retardation effect on crystallization rate and had a dominant effect on the final crystalline morphology of the iPP/PPOc alloy. By simply changing the LLPS time or temperature, we could control the size and the distribution of the elastomer phase that dispersed in the iPP spherulites. The growth rate of the spherulites significantly depended on the degree of LLPS. Higher degree of phase separation reduced nuclei density and the growth rate of spherulites. However, it was helpful to the formation of more perfect spherulites. But surprisingly, there seemed to be little variation of crystallinity between the two quenching procedures (i.e., single quench vs. double quench). Overall, the competition between LLPS and crystallization significantly influenced the structural and morphological development of the iPP/PPOc alloy. By controlling the interplay between LLPS and crystallization of iPP/PPOc alloy, it was possible to control the structure and morphology as needed in applications. (c) 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013
语种	英语
出版者	WILEY-BLACKWELL
WOS记录号	WOS:000320031000071
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/54837]
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 Acad Sci, State Key Lab Polymer Phys & Chem, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Wang, Jihui,Han, Charles C.. Structural and morphological development in polypropylene/poly(propylene-1-octene) in-reactor alloy due to the competition between liquid-liquid phase separation and crystallization[J]. JOURNAL OF APPLIED POLYMER SCIENCE,2013,129(5):2977-2985.
APA	Wang, Jihui,&Han, Charles C..(2013).Structural and morphological development in polypropylene/poly(propylene-1-octene) in-reactor alloy due to the competition between liquid-liquid phase separation and crystallization.JOURNAL OF APPLIED POLYMER SCIENCE,129(5),2977-2985.
MLA	Wang, Jihui,et al."Structural and morphological development in polypropylene/poly(propylene-1-octene) in-reactor alloy due to the competition between liquid-liquid phase separation and crystallization".JOURNAL OF APPLIED POLYMER SCIENCE 129.5(2013):2977-2985.