文献类型：期刊文献

英文题名：Thermal pressure coefficient and internal pressure for polymers

作者：Liu, GJ; Yu, DH

年份：1996

卷号：54

期号：2

起止页码：113

外文期刊名：ACTA CHIMICA SINICA

收录：;WOS:【SCI-EXPANDED(收录号:WOS:A1996UA97900002)】；

语种：英文

摘要：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, gamma = RM upsilon/(M upsilon)(2) - AM upsilon + 0.2535A(2) where upsilon 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.