EFFECTS OF PRESSURE AND TEMPERATURE ON DENSITIES OF LIQUID POLYMERS

被引:33
作者
MCGOWAN, JC
机构
[1] Imperial Chemical Industries Ltd, Research Department, Welwyn Garden City, Hertfordshire, Bessemer Road
关键词
D O I
10.1016/0032-3861(69)90113-X
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
An equation is given which relates the pressure p, density d and absolute temperature T of unassociated liquids. This equation, in the following form, can be used for polymeric liquids (with c.g.s. units): 1·9X106p( T'c-T T'c)0·9=( 21P'd M')9-[ 8·24X105(T'c-T) T'c]2·7. P′ is the parachor and M′ is the molecular weight for the repeating unit and both can be calculated readily. For a given polymer, T′c is a constant and equals the temperature-reducing parameter proposed by A. Bondi. A considerable number of well known polymers of high molecular weight have almost the same value of T′c which seems to depend upon the molecular flexibility. © 1969.
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页码:841 / &
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