TIME-RESOLVED FLUORESCENCE STUDY OF CHAIN DYNAMICS .1. POLY(METHACRYLIC ACID) IN DILUTE WATER SOLUTIONS

被引：112

作者：

BEDNAR, B ^{[1
]}

TRNENA, J ^{[1
]}

SVOBODA, P ^{[1
]}

VAJDA, S ^{[1
]}

FIDLER, V ^{[1
]}

PROCHAZKA, K ^{[1
]}

机构：

[1] CHARLES UNIV, FAC NAT SCI, DEPT PHYS CHEM, CS-11636 PRAGUE 1, CZECHOSLOVAKIA

来源：

MACROMOLECULES | 1991年 / 24卷 / 08期

关键词：

D O I：

10.1021/ma00008a053

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Fluorescence decay and polarization of dansyl-labeled poly(methacrylic acid) (PMA) and poly-(acrylic acid) (PAA) have been studied as a function of pH. The decay measurements have shown that, at low pH, PMA chains form highly compact hydrophobic clusters, which are joined by short extended polymer chains. During the transition form the compact to the expanded form, the size of the clusters decreases up to a limit, beyond which the clusters disintegrate completely to an expanded polymer chain. The effect of PMA molar mass and ionic strength on this process was investigated.

引用

页码：2054 / 2059

页数：6

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