STATES OF WATER IN CATIONICALLY CHARGED POLY(VINYL ALCOHOL) MEMBRANES

被引：40

作者：

FUSHIMI, H ^{[1
]}

ANDO, I ^{[1
]}

IIJIMA, T ^{[1
]}

机构：

[1] TOKYO INST TECHNOL,DEPT POLYMER SCI,MEGURO KU,TOKYO 152,JAPAN

来源：

POLYMER | 1991年 / 32卷 / 02期

关键词：

CATIONICALLY CHARGED POLY(VINYL ALCOHOL) MEMBRANES; DIFFERENTIAL SCANNING CALORIMETRY; NUCLEAR MAGNETIC RESONANCE; STATES OF WATER; MOBILITY OF WATER; FREEZABLE WATER; NONFREEZABLE WATER; CELLULOSE-ACETATE MEMBRANES; POLYMER MEMBRANES; BOUND WATER; GELS; NMR; RESONANCE; MOLECULES; FILMS;

D O I：

10.1016/0032-3861(91)90009-8

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Differential scanning calorimetry (d.s.c.) and pulsed H-1 nuclear magnetic resonance (n.m.r.) measurements were carried out on cationically charged poly(vinyl alcohol) (PVA) membranes to obtain information about the states of water in polymer matrices. From the d.s.c. data, water present in the polmer matrices is classified as (i) freezable and (ii) non-freezable, whereas n.m.r. measurements indicate its classification into (i) free and (ii) bound water. The amounts of free and bound water depend on the mobility of polymer chains and distinguish between freezable and non-freezable. The correlation time obtained from spin-lattice relaxation indicates that the mobility of water in poly[vinyl alcohol-co-(N-(3-trimethylammoniopropyl)acrylamide chloride)] (PVA-N) membranes (H = 0.358) is approximately 10(4) times shorter than in bulk water.

引用

页码：241 / 248

页数：8

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