Positron annihilation lifetime studies of the volume phase transition of polyacrylamides

被引：8

作者：

Ito, K ^{[1
]}

Ujihira, Y ^{[1
]}

Yamashita, T ^{[1
]}

Horie, K ^{[1
]}

机构：

[1] UNIV TOKYO,GRAD SCH ENGN,BUNKYO KU,TOKYO 113,JAPAN

来源：

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY-ARTICLES | 1996年 / 210卷 / 02期

关键词：

D O I：

10.1007/BF02056390

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Discontinuous and continuous volume phase transitions of organic polymer hydrogels, such as polyacrylamide (PAAm) and poly(N-isopropylamide) (PNIPA) gels, upon pH and temperature were studied by the positron annihilation lifetime measurement, which allows the estimation of size, intensity and size distribution of the free volume. Microscopic changes of physical and chemical interactions between gel network and solvent molecules and among conjugated solvent molecules at volume phase transitions of polyacrylamide gels were discussed.

引用

页码：505 / 511

页数：7

共 19 条

[1] FLUORESCENCE STUDIES OF DANSYL-LABELED POLY(N-ISOPROPYLACRYLAMIDE) GELS AND POLYMERS IN MIXED WATER/METHANOL SOLUTIONS [J].