CO2 SORPTION PROPERTIES AND ENTHALPY RELAXATION IN ALTERNATING COPOLY(VINYLIDENE CYANIDE VINYL ACETATE)S

被引：15

作者：

HACHISUKA, H ^{[1
]}

TSUJITA, Y ^{[1
]}

TAKIZAWA, A ^{[1
]}

KINOSHITA, T ^{[1
]}

机构：

[1] NAGOYA INST TECHNOL,DEPT MAT SCI & ENGN,POLYMER MAT COURSE,GOKISO CHO,SHOWA KU,NAGOYA,AICHI 466,JAPAN

来源：

POLYMER | 1988年 / 29卷 / 11期

关键词：

Carbon Dioxide--Sorption - Polymers--Thermodynamics;

D O I：

10.1016/0032-3861(88)90179-6

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

To elucidate the mechanism of gas sorption by amorphous glassy alternating copoly(vinylidene cyanide-vinyl acetate), the effect of annealing just below the glass transition temperature (Tg) on CO2 sorption properties of the polymer was investigated. A comparison of the reduction in the Langmuir sorption-capacity constant, C′H, with enthalpy relaxation during annealing was made. The values of C′H were obtained by application of the dual-mode sorption theory to the experimental sorption data. The equilibrium amount of CO2 sorption at 25°C in copoly(vinylidene cyanide-vinyl acetate) annealed at sub-Tg decreased with increasing annealing period. The amount of sorption in the annealed films, however, did not change after physical ageing at room temperature. Good correlation has been obtained between the change in C′H and the decrease in the enthalpy deduced from thermal analysis of the polymers. The magnitude of C′H and the enthalpy of copoly(vinylidene cyanide-vinyl acetate) have been interpreted in terms of the densification of the glassy polymer during sub-Tg annealing.

引用

页码：2050 / 2055

页数：6

共 12 条

[1] EFFECT OF SUB-TG ANNEALING ON CO2 SORPTION IN POLYCARBONATE [J].