STRUCTURAL REORGANIZATION OF PHOSPHATIDYLCHOLINE VESICLE MEMBRANES BY POLY(2-ETHYLACRYLIC ACID) - INFLUENCE OF THE MOLECULAR-WEIGHT OF THE POLYMER

被引：37

作者：

SCHROEDER, UKO ^{[1
]}

TIRRELL, DA ^{[1
]}

机构：

[1] UNIV MASSACHUSETTS,DEPT POLYMER SCI & ENGN,AMHERST,MA 01003

来源：

MACROMOLECULES | 1989年 / 22卷 / 02期

关键词：

Fluorescence - Monomers--Polymerization - Plastics--Molecular Weight - Polymers--Solutions;

D O I：

10.1021/ma00192a042

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Three samples of poly(2-ethylacrylic acid) (PEAA) of different molecular weights (M¯w = 164,000, 43,000, and 12,000) were prepared by radical polymerization of 2-ethylacrylic acid in bulk. The conformational properties of the samples were determined and correlated with the pH-dependent structural reorganization observed in phosphatidylcholine vesicles suspended in the respective polymer solutions. In all experiments the sample of lowest molecular weight behaved differently from the other two: The cooperativity of the conformational transition was reduced and the transition midpoint was shifted to lower pH as compared to the samples of higher molecular weight.

引用

页码：765 / 769

页数：5

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