DYNAMIC VISCOELASTICITY DURING SOL-GEL REACTIONS

被引：41

作者：

HODGSON, DF ^{[1
]}

AMIS, EJ ^{[1
]}

机构：

[1] UNIV SO CALIF,DEPT CHEM,LOS ANGELES,CA 90089

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 1991年 / 131卷 / pt 2期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/0022-3093(91)90702-8

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The evolution of viscoelasticity during the gelation reactions of tetraethoxysilane solutions has been monitored from initial reactant mixing through the sol-gel transition with the multiple lumped resonator instrument. Gel points are determined by the observation of a frequency-independent loss tangent at a singular extent of reaction. The frequency dependence of G' and G" can be compared with recent theoretical models and simulations. Comparisons are made between the results for the chemical gel and the physical gel of gelatin. Again the occurrence of a frequency independent loss tangent corresponds to the macroscopic gel point.

引用

页码：913 / 920

页数：8

共 29 条

[11] DYNAMIC VISCOELASTIC CHARACTERIZATION OF SOL-GEL REACTIONS [J].