摘要
将298.15 K时各种液态聚合物的内压平方根λ和重复单元的摩尔体积Vm的乘积对它们的van derWaals体积作图时,发现是一条通过坐标原点的直线.这意味着聚合物的λVm具有良好的基团加和性.据此,建立了一个能满意地预测聚合物内压的基团贡献法.结合Small的基团摩尔引力常数,该基团贡献法也能用来计算液态聚合物在298.15 K时的新溶解度参数值.
The products of the square-root of internal pressure λ and the molar volume of the repeated unit Vm for various polymeric liquids at 298.15 K were plotted against their van der Waals volumes. A straight line through the origin of coordinates was obtained. This means that the λVm of polymers has good group additivity. Therefore, a method of group contribution which can be used to predict the internal pressure of polymeric liquids was established. Combining with Small's molar-attraction constants, the values of new solubility parameter defined by the authors' previous work for various polymers at 298.15 K can be obtained by this method.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2002年第12期1288-1293,共6页
CIESC Journal
基金
国家自然科学基金资助项目(No.29676011).
