FORMATION OF THE GLASSY STATE AND MESOPHASE IN THE WATER-SODIUM ALGINATE SYSTEM

被引：39

作者：

NAKAMURA, K

HATAKEYAMA, T

HATAKEYAMA, H

机构：

[1] RES INST POLYMERS & TEXT, TSUKUBA, IBARAKI 305, JAPAN

[2] IND PROD RES INST, TSUKUBA, IBARAKI 305, JAPAN

来源：

POLYMER JOURNAL | 1991年 / 23卷 / 04期

关键词：

SODIUM ALGINATE; WATER; GLASS TRANSITION; MESO-PHASE; DIFFERENTIAL SCANNING CALORIMETRY; NON-FREEZING WATER; GLASSY WATER;

D O I：

10.1295/polymj.23.253

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The phase transition of water-sodium alginate with water content (W(c)) (grams of water/gram of dry sample) from 0 to 2.5 was studied using differential scanning calorimetry (DSC). Upon heating, glass transition (T(g)), cold crystallization and melting were observed in the W(c) range from 0.49 to 2.5. At a W(c) less than 0.49, only T(g) was observed. During cooling, the crystallization of water in the system was observed from the W(c) = 0.77. The above difference suggests the presence of glassy water which crystallizes during the heating process. The contribution of non-freezing water and glassy water to T(g) and C(p) of the system was estimated.

引用

页码：253 / 258

页数：6

共 22 条

[1] ANOMALOUS PROPERTIES OF SUPERCOOLED WATER - HEAT-CAPACITY, EXPANSIVITY, AND PROTON MAGNETIC-RESONANCE CHEMICAL-SHIFT FROM 0 TO -38 DEGREES [J].