Tunable ordered droplets induced by convection in phase-separating P2VP/PS blend film

doi:10.1016/j.polymer.2004.09.065

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	Tunable ordered droplets induced by convection in phase-separating P2VP/PS blend film
	Cui, L; Wang, HF; Ding, Y; Han, YC
刊名	POLYMER
	2004-11-11
卷号	45 期号:24 页码:8139-8146
关键词	Ordered Droplets Convection Phase-separating
ISSN号	0032-3861
DOI	10.1016/j.polymer.2004.09.065
英文摘要	Ordered hexagonal droplets patterns in phase-separating polymeric blend films of polystyrene and poly(2-vinylpyridine) (PS/PVP) formed due to the convection effect by solvent evaporation. The influences of PS molecular weight, solvent evaporation rate, and the weight ratio of PS to PVP on the PVP-rich domains pattern formation and distributions were investigated by atomic force microscope (AFM). Only in an appropriate range of molecular weight of PS, can the ordered pattern form. Too low or too high molecular weight of PS led no ordered pattern due to the viscosity effects. The increase of solvent evaporation rate decreased the mean radius of the PVP-rich domains and the intervals between the centers of the domains due to the enhancement of the viscosity on the top layer of the fluid film. The increase of the weight ratio of PS to PVP decreased mean radius of the PVP-rich domains whereas the intervals between the centers of droplets remained constant. Therefore, the size and the distributions of ordered patterns can be tuned by the polymer molecular weight, the weight ratio of the two components and the solvent evaporation rate. It revealed that the hydrodynamic effects played a significant role on the pattern formation and distributions. (C) 2004 Elsevier Ltd. All rights reserved.
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000225119600007
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/81903]
专题	中国科学院化学研究所
通讯作者	Han, YC
作者单位	Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
推荐引用方式 GB/T 7714	Cui, L,Wang, HF,Ding, Y,et al. Tunable ordered droplets induced by convection in phase-separating P2VP/PS blend film[J]. POLYMER,2004,45(24):8139-8146.
APA	Cui, L,Wang, HF,Ding, Y,&Han, YC.(2004).Tunable ordered droplets induced by convection in phase-separating P2VP/PS blend film.POLYMER,45(24),8139-8146.
MLA	Cui, L,et al."Tunable ordered droplets induced by convection in phase-separating P2VP/PS blend film".POLYMER 45.24(2004):8139-8146.