DETERMINATION OF INTERDIFFUSION IN THIN POLYMER-FILMS USING FTIR REFLECTION-ABSORPTION SPECTROSCOPY

被引：13

作者：

EKLIND, H ^{[1
]}

HJERTBERG, T ^{[1
]}

机构：

[1] CHALMERS UNIV TECHNOL,DEPT POLYMER TECHNOL,S-41296 GOTHENBURG,SWEDEN

来源：

MACROMOLECULES | 1993年 / 26卷 / 22期

关键词：

D O I：

10.1021/ma00074a004

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

FTIR reflection absorption spectroscopy (RAS) has been used to develop a method to study interactions in artificial interphases of polymer blends. Two films of Poly(vinyl ethyl ether) (PVEE) and poly(ethylene-co-acrylic acid) (EAA), with thicknesses ranging from 100 to 600 angstrom each, were solution cast on a gold surface and annealed at 125-degrees-C for different times. The carboxylic acid groups of EAA differently hydrogen bonded to different species, and the diffusion of EAA and PVEE into each other could be followed by studying the C=O bands in the infrared spectra. One advantage of studying these thin films instead of entire blends is that the influence of the bulk properties is reduced, and we therefore observe the behavior of the molecules in the artificial interphase itself. Quantitative measurements of the amount of hydrogen bonds made it possible to calculate the diffusion constant and also to obtain a measure of the interphase thickness after different annealing times.

引用

页码：5844 / 5851

页数：8

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