CONDENSATION BEHAVIOR OF A SILANE COUPLING AGENT IN THE PRESENCE OF COLLOIDAL SILICA STUDIED BY SI-29 AND C-13 NMR

被引：32

作者：

NISHIYAMA, N ^{[1
]}

ASAKURA, T ^{[1
]}

HORIE, K ^{[1
]}

机构：

[1] TOKYO UNIV AGR & TECHNOL,FAC TECHNOL,DEPT POLYMER ENGN,KOGANEI,TOKYO 184,JAPAN

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 1988年 / 124卷 / 01期

关键词：

COLLOIDS - NUCLEAR MAGNETIC RESONANCE - SILICA;

D O I：

10.1016/0021-9797(88)90319-0

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The hydrolysis and condensation mechanisms of a silane coupling agent in the presence of colloidal silica were investigated with **2**9Si and **1**3C NMR. The influence of colloidal silica on the reaction is acceleration of the hydrolysis of the methoxy group of the silane coupling agent and, conversely, deceleration of the condensation of the hydrolyzed species. After 56 days, the main products are oligomeric species in the presence of colloidal silica, although mainly polymeric species are produced when the colloidal silica is absent. These results may derive from the acidic character of the colloidal silica.

引用

页码：14 / 21

页数：8

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