NEGATIVE HAMAKER COEFFICIENTS .2. PHASE-SEPARATION OF POLYMER-SOLUTIONS

被引：50

作者：

VANOSS, CJ ^{[1
]}

OMENYI, SN ^{[1
]}

NEUMANN, AW ^{[1
]}

机构：

[1] UNIV TORONTO,DEPT MECH ENGN,TORONTO M5S 1A1,ONTARIO,CANADA

来源：

COLLOID AND POLYMER SCIENCE | 1979年 / 257卷 / 07期

关键词：

D O I：

10.1007/BF01474103

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A study of the compatibility and incompatibility of 31 combinations of solutions of pairs of polymers in various common solvents was undertaken. A new approach, which utilizes the sign of the combined Hamaker coefficients (A132), was used. In this approach, phase separation is predicted to occur if A132 is negative, and mixing if A132 is positive. The Hamaker coefficients were derived from interfacial free energies. Good agreement between theory and experiment was obtained for systems at low polymer concentrations and for values for A132 farther removed from 0 than ≈ ± 0.3 X 10-14 ergs. The concentration dependence of the phenomenon has been studied more closely with eight of these solutions of polymer pairs, and the influence of polymer concentration on the surface tension of the liquids has been elucidated. © 1979 Dr. Dietrich Steinkopff Verlag.

引用

页码：737 / 744

页数：8

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