SI-29-NMR STUDY OF HYDROLYSIS AND INITIAL POLYCONDENSATION PROCESSES OF ORGANOALKOXYSILANES .2. METHYLTRIETHOXYSILANE

被引：86

作者：

SUGAHARA, Y

OKADA, S

SATO, S

KURODA, K

KATO, C

机构：

[1] Department of Applied Chemistry, School of Science and Engineering, Waseda University, Shinjuku-ku, Tokyo, 169

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 1994年 / 167卷 / 1-2期

关键词：

D O I：

10.1016/0022-3093(94)90362-X

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 hydrolysis and initial polycondensation processes of methyltriethoxysilane (MTES) have been investigated by high-resolution Si-29-nuclear magnetic resonance spectroscopy (Si-29-NMR). MTES was hydrolyzed in the system with MTES:ethyl alcohol:water:HCl = 1:4:x:y; x = 1, 2, 3, 6; y = 1 X 10(-4), 1 X 10(-2). Signals due to end and middle groups of polysiloxanes formed sub-regions on the basis of the number of hydroxyl groups attached to silicon, and the sub-region for silicon possessing more hydroxyl groups was observed at a lower field. Based on signal intensities, the signals due to the dimers (Me(HO)2SiOSi(OH)2Me and Me(HO)2SiOSi(OH)(OEt)Me) and the trimer (Me(HO)2SiOSiMe(HO)OSi(OH)2Me) (Me = CH3, Et = C2H5) were identified.

引用

页码：21 / 28

页数：8

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