SOLVATOCHROMIC CHARACTERIZATION OF POLYMERS - EFFECTS OF RELATIVE-HUMIDITY

被引：19

作者：

MCGILL, RA ^{[1
]}

PALEY, MS ^{[1
]}

HARRIS, JM ^{[1
]}

机构：

[1] UNIV ALABAMA,DEPT CHEM,HUNTSVILLE,AL 35899

来源：

MACROMOLECULES | 1992年 / 25卷 / 12期

关键词：

D O I：

10.1021/ma00038a002

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

This study is concerned with the effects of relative humidity on polymer sorption properties as revealed by changes in hydrogen-bonding acidity and E(T)(30) values. Thin films of four polymers containing Reichardt's dye [2,6-diphenyl-4-(2,4,6-triphenyl-N-pyridinio)phenolate] were subjected to varying levels of relative humidity, and the UV-visible spectra of the polymer films were obtained. From these data hydrogen-bonding acidities and E(T)(30) values for the polymers were computed. The effect of humidity on these solvatochromic parameters was found to vary greatly, depending on the polymer, indicating that polymer sorption properties (such as solute solubility and membrane permeability) are a function of the humidity to which the polymer is exposed. Kinetic studies of the sorption and desorption of water vapor by films of poly(vinyl acetate) were also conducted, and these studies show that polymer/dye films can give large, reversible, rapid changes in color (visible absorption maximum) with changes in humidity. The possibility of application to sensor technology is discussed.

引用

页码：3015 / 3019

页数：5

共 11 条

[1] HYDROGEN-BONDING .8. POSSIBLE EQUIVALENCE OF SOLUTE AND SOLVENT SCALES OF HYDROGEN-BOND BASICITY OF NON-ASSOCIATED COMPOUNDS [J].