SORPTION AND PARTIAL MOLAR VOLUMES OF GASES IN POLY(ETHYLENE-CO-VINYL ACETATE)

被引:25
作者
KAMIYA, Y
NAITO, Y
BOURBON, D
机构
[1] National Institute of Materials and Chemical Research, Tsukuba, Ibaraki, 305
关键词
POLY(ETHYLENE-CO-VINYL ACETATE); GAS SORPTION IN; DILATION OF POLY(ETHYLENE-CO-VINYL ACETATE) DUE TO GAS SORPTION; PARTIAL MOLAR VOLUME OF DISSOLVED GASES; THERMAL EXPANSIVITY OF DISSOLVED GAS;
D O I
10.1002/polb.1994.090320209
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Sorption and dilation properties of polymer-gas systems involving poly( ethylene-co-vinyl acetate) and N-2, CH4, or CO2, have been investigated at pressures up to 50 atm at temperatures of 10-40 degrees C. Sorption isotherms for low-solubility gases (i.e., CH4 and Nz) can be described by Henry's law, and those for high-solubility gas (i.e., CO2) by Flory-Huggins dissolution equation. Dilation isotherms are similar in contour to the corresponding sorption isotherms. From the obtained sorption and dilation data, partial molar volumes of the gases in the polymer were determined as a function of temperature. Thermal expansivity of dissolved CO2 molecules was estimated at ca. 2.4X10(-3)degrees C-1 from the temperature dependence of partial molar volume. The expansivity is smaller than that of liquid CO2 and larger than those of the polymer and organic liquids. (C) 1994 John Wiley and Sons, Inc.
引用
收藏
页码:281 / 286
页数:6
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