文献类型：期刊文献

中文题名：聚合物的热压力系数及内压

英文题名：Thermal Pressure Coefficient and Internal Pressure for Polymers

作者：刘国杰[1];虞大红[1]

机构：[1]华东理工大学化学系,上海200237

年份：1996

卷号：54

期号：2

起止页码：113

中文期刊名：化学学报

外文期刊名：Acta Chimica Sinica

收录：CSTPCD;;Scopus;北大核心:【北大核心1992】；CSCD:【CSCD2011_2012】；

基金：国家自然科学基金资助项目

语种：中文

中文关键词：聚合物;热压力系数;内压;范德华模型

摘要：本文将我们在前文中提出的修正van der Waals模型,推广到了液态聚合物中,从而建立了一个能在宽阔温度范围内准确计算聚合物热压力系数的关系式γ=RMv/(Mv)~2-AMv+0.2535A^2式中v和M分别为聚合物的比体积和链节的摩尔质量,A为聚合物的特性常数.对于本文考察的五种聚合物,发现它们的链节大小均为聚合物的三个结构单元.
The modified van der Waals' model suggested by our previous work is extended to the liquid polymers in this paper. A relation between the thermal pressure coefficient and the density of polymer, which can be used to calculate the thermal pressure coefficients of polymers accurately at the wide range of temperature, is established as follows,where v and M are the specific volume of polymer and the molar mass of a segment respectively, and A is the characteristic constant. It is found that the size of a segment is about equal to three structural units for five polymers examined.