ADSORPTION-KINETICS OF POLYSTYRENE ONTO GERMANIUM FROM A CARBON-TETRACHLORIDE SOLUTION

被引：15

作者：

COUZIS, A ^{[1
]}

GULARI, E ^{[1
]}

机构：

[1] UNIV MICHIGAN,DEPT CHEM ENGN,ANN ARBOR,MI 48109

来源：

MACROMOLECULES | 1994年 / 27卷 / 13期

关键词：

D O I：

10.1021/ma00091a020

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

We report the results of an experimental study of adsorption as a function of concentration and molecular weight for the system polystyrene/carbon tetrachloride/germanium. Adsorption measurements were made using Fourier transform infrared attenuated total reflection spectroscopy (FTIR-ATR). We find a strong dependence of adsorption on the bulk solution concentration and the molecular weight of the adsorbing polymer. The data provide evidence that the rate limiting step for the adsorption process is the entry of new macromolecular chains into the immediately formed and highly constrained polymer layer. A theoretical model based on the scaling concepts, first introduced by de Gennes, is proposed, and its predictions are compared with the experimental data. The data also suggest the presence of a highly constrained (glassylike) layer, with a structure that depends on the parameters of the system.

引用

页码：3580 / 3588

页数：9

共 51 条

[1] SELF-SIMILAR STRUCTURE OF AN ADSORBED POLYMER LAYER - COMPARISON BETWEEN THEORY AND SCATTERING EXPERIMENTS [J].