NONSPECIFIC INTERACTIONS IN POLYMER-POLYMER REACTIONS .2. COMPLEX-FORMATION BETWEEN POLYMETHACRYLIC ACID AND MONOSUBSTITUTED POLY(ETHYLENE GLYCOLS)

被引：38

作者：

BARANOVSKY, V ^{[1
]}

SHENKOV, S ^{[1
]}

RASHKOV, I ^{[1
]}

BORISOV, G ^{[1
]}

机构：

[1] BULGARIAN ACAD SCI,INST POLYMER,BU-1113 SOFIA,BULGARIA

来源：

EUROPEAN POLYMER JOURNAL | 1991年 / 27卷 / 07期

关键词：

D O I：

10.1016/0014-3057(91)90149-I

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Complex formation between poly(methyacrylic acid) and monosubstituted poly(ethylene glycols) (PEG) in dilute aqueous solutions has been studied by potentiometric titration and viscometry. The presence of a hydrophobic group in the PEG chain results in a significant decrease of the critical chain length of PEG, necessary for the formation of stable complexes. The higher stability of these polycomplexes is determined by additional reduction in the free energy of the system because of nonspecific interaction of the hydrophobic group with the hydrophobic domains of the polycomplex. Complex formation with PEGs, carrying various hydrophobic groups, strongly suggests that these nonspecific interactions are of general character, irrespective of the chemical nature of the group. Such phenomena might also be important in the reactions of biopolymers in living organisms.

引用

页码：643 / 647

页数：5

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