【摘要】 实验测定了聚氧化乙烯（ＰＥＯ）和聚醋酸乙烯酯（ＰＶＡｃ）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混体系的交换能参数（Ｘ_１２）、相互作用参数（ｘ_１２／ｒ_１）和剩余混合体积（Ｖ^Ｅ／Ｖ^０）．更多还原

【Abstract】 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 .更多还原