The sol-gel polymerization of octamethoxysilsesquioxane

In order to understand the effect of various solvents and catalysts on the sol-gel polymerization of [SigOi2](OCHg)g, the polymerization was followed by 29Si NMR spectroscopy, which indicated that the cubic structure of [SigOi2](OCH3)g was retained under initial polymerization conditions. Polymerization under acidic conditions was much slower than under basic or neutral conditions. The 29Si NMR spectra of the sol-gel system suggested that an extremely broad molecular weight distribution of silicate polymers was produced. These findings were consistent with predictions based on a covalent network theory of silica gelation (Flory-Stockmayer) theory.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Chemistry

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2011

Author dc:creator

• Cagle, Phillip Carter

Contributors dc:contributor

• Klemperer, Walter G.

• Chemistry, Inorganic
• Chemistry, Polymer
• Engineering, Materials Science

Statement dc:rights

• Copyright 1992 Cagle, Phillip Carter

Language dc:language

eng

Identifier

AAI9305477
(UMI)AAI9305477

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/19238