聚氧化乙烯和聚醋酸乙烯酯共混热力学参数的理论估算  

APPLICATION OF EQUATION -OF - STATE THEORY TO POLY(ETHYLENE OXIDE) AND POLY (VINYL ACETATE) BLENDING SYSTEM

作　　者：殷敬华[1] 张宏放[1] 庞德仁[1] 阎春珍 杨宝泉[1] 

机构地区：[1]中国科学院长春应用化学研究所高分子物理联合开放研究实验室

出　　处：《高分子学报》1994年第3期348-353,共6页Acta Polymerica Sinica

基　　金：国家自然科学基金

摘　　要：实验测定了聚氧化乙烯和聚醋酸乙烯酯的共混热以及共混组分的热压系数和热膨胀系数。并由上述实测值计算了状态方程参数。用Ｈａｍａｄａ＾［１－２］等改进的Ｆｌｏｒｙ状态方程理论估算了ＰＥＯ／ＰＶＡｃ共混体系的交换能参数，相互作用参数和剩余混合体积。lory's equation-of-state theory with modified combinary rules was applied to estimate the thermodynamic parameters of poly (ethylene oxide ) and poly(vinyl acetate) blending system. For this purpose, heats of mixing , densities, thermal expansion coefficients and thermal pressure coefficients for this system were measured. The heats of mixing of blends in all the range of compositions by application of Hess's law were negative. And the interactionparameters, the exchange enthalpy and the excess volumes were negative too.These results supported strongly from the experimental and the theoretical pointof view that this blending system are miscible .

关 键 词：共混热 聚氧化乙烯 聚醋酸乙烯酯 

分 类 号：O632.12[理学—高分子化学]