Confined crystallization behavior of PEO in silica networks

被引：74

作者：

Jiang, S ^{[1
]}

Yu, D ^{[1
]}

Ji, X ^{[1
]}

An, L ^{[1
]}

Jiang, B ^{[1
]}

机构：

[1] Chinese Acad Sci, Changchun Inst Appl Chem, Polymer Phys Lab, Changchun 130022, Peoples R China

来源：

POLYMER | 2000年 / 41卷 / 06期

基金：

中国国家自然科学基金;

关键词：

confined crystallization behavior; PEO/SiO2; hybrid;

D O I：

10.1016/S0032-3861(99)00342-0

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Poly(ethylene oxide) (PEO) and silica (SiO2) organic-inorganic hybrid materials have been synthesized by sol-gel approach. The crystallization behavior of PEO in silica networks has been investigated by differential scanning calorimeter (DSC) and scanning electron micrograph (SEM). The degree of PEO crystallinity in PEO/SiO2 hybrid networks reduces with the increase of SiO2. PEO is in amorphous state when the concentration of PEO is lower than 50 wt% in the hybrid materials. The melting points of PEO in the networks are lower than that of pure PEG, but the melting point of PEO in the networks almost has the same melting point. WAXD and SEM results show that the crystalline behavior of PEO in PEO/SiO2 hybrid system is sternly confined. (C) 1999 Elsevier Science Ltd. All rights reserved.

引用

页码：2041 / 2046

页数：6

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