Effect of solvent evaporation rate on surface composition in fluoro-copolymer/acrylate-copolymer blend films

被引：2

作者：

Akiyama, S ^{[1
]}

Tsukiji, N ^{[1
]}

Akiba, I ^{[1
]}

Inoue, M ^{[1
]}

Kano, Y ^{[1
]}

机构：

[1] Tokyo Univ Agr & Technol, Dept Organ & Polymer Mat Chem, Fac Technol, Koganei, Tokyo 1848588, Japan

来源：

POLYMER INTERNATIONAL | 2001年 / 50卷 / 06期

关键词：

gradient structure; surface composition; polymer blend; solvent evaporation;

D O I：

10.1002/pi.680

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The relationship between the surface composition and the rate of solvent evaporation (R) in blend films of poly(vinylidene fluoride-co-hexafluoroacetone) (P(VDF-HFA)) and poly(2-ethylhexyl acrylate-co-acrylic acid-co-vinyl acetate) (P(2EHA-AA-VAc)) has been investigated. P(VDF-HFA), a low-surface tension component, was concentrated on the surface when R was relatively high. In contrast, when R was relatively low, P(2EHA-AA-VAc), a low-density component, was concentrated on the surface. Therefore, it is speculated that the factors dominating surface enrichment in polymer blends were changed from surface tension differences to density differences between the components when R was decreased. In addition, the affinity between components and substrate strongly affects the dominant factors determining the surface composition. (C) 2001 Society of Chemical Industry.

引用

页码：659 / 662

页数：4

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