Interface-induced coarsening process in polymer blends

被引：15
|
作者：
Xie, XM [1 ]
Kong, XM
Xiao, TJ
Yang, Y
Gao, N
Tanioka, A
机构：
[1] Tsing Hua Univ, Inst Polymer Sci & Engn, Dept Chem Engn, Beijing 100084, Peoples R China
[2] Tokyo Inst Technol, Dept Organ & Polymer Mat, Meguro Ku, Tokyo 152, Japan
来源：
JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2001年 / 234卷 / 01期
基金：
中国国家自然科学基金;
关键词：
polypropylene; ethyl vinyl acetate copolymer; coarsening; substrate; interface; wetting effect;
D O I：
10.1006/jcis.2000.7298
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The coarsening process of the droplets in a two-phase polymer blend (PP/EVAc) was studied under two-dimensional and three-dimensional conditions using a phase contrast microscope and computer image analyzer. The results showed that under three-dimensional conditions the growth of the droplet's radius with time follows r(3) similar to t(1.01), corresponding to the evaporation-condensation theory of Lifshitz-Slyozov, r(3) similar to t, while under two-dimensional conditions the growth law is r(3) similar to t(1.31). The growth rate of the droplets under two-dimensional conditions is faster than that under three-dimensional conditions. This difference is caused by an interfacial interaction (wetting effects) between the substrates and polymer blend. The existence of the interface promoted the coarsening process of the polymer blend under two-dimensional conditions. (C) 2001 Academic Press.
引用
收藏
页码：24 / 27
页数：4
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