High Frequency Spectroscopic Study of the Bound State of Water in PEG-H2O System during Heating from Frozen State

被引：7

作者：

Takei, Takaya ^{[1
]}

Sugitani, Yoshinori ^{[1
]}

机构：

[1] Kanagawa Univ, Fac Sci, Dept Chem, Hiratsuka, Kanagawa 2591293, Japan

来源：

ANALYTICAL SCIENCES | 2010年 / 26卷 / 03期

关键词：

X-RAY-DIFFRACTION; POLY(ETHYLENE OXIDE); ALCOHOL MIXTURES; SEPARATION SELECTIVITY; COLD CRYSTALLIZATION; PROTEIN ADSORPTION; NMR RELAXATION; GLYCOL); SURFACE; PMEA;

D O I：

10.2116/analsci.26.337

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The bound state of water in PEG (polyethylene glycol)-H2O systems was studied by using HFS and DSC methods. Samples with the mixing ratios EO:H2O = 1:1 (a) and 1:10 (b), where EO indicates the ethylene oxide units in PEG chain, were heated from frozen state to melt state. Sample (a) gave an HFS peak corresponding to the weakly bound water, while sample (b) gave the peaks of both the bound and free water. DSC measurements gave quite similar patterns to those of HFS measurements, but with additional peaks corresponding to cold crystallization. The difference between the two measurements was reasonably interpreted by considering the origin of the cold crystallization.

引用

页码：337 / 341

页数：5

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