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Synthesis of Polyimide-Silicate Hybrids Via Sol-Gel Ultrastructure Processing

Published online by Cambridge University Press:  21 February 2011

M. Spinu ,
A. Brennan ,
J. Rancourt ,
G. L. Wilkes  and
J. E. McGrath
M. Spinu
Affiliation:
Departments of Chemistry, Chemical Engineering and NSF Science and Technology Center: High Performance Polymeric Adhesives and CompositesVirginia Polytechnic Institute and State University, Blacksburg, VA 24061
A. Brennan
Affiliation:
Departments of Chemistry, Chemical Engineering and NSF Science and Technology Center: High Performance Polymeric Adhesives and CompositesVirginia Polytechnic Institute and State University, Blacksburg, VA 24061
J. Rancourt
Affiliation:
Departments of Chemistry, Chemical Engineering and NSF Science and Technology Center: High Performance Polymeric Adhesives and CompositesVirginia Polytechnic Institute and State University, Blacksburg, VA 24061
G. L. Wilkes
Affiliation:
Departments of Chemistry, Chemical Engineering and NSF Science and Technology Center: High Performance Polymeric Adhesives and CompositesVirginia Polytechnic Institute and State University, Blacksburg, VA 24061
J. E. McGrath
Affiliation:
Departments of Chemistry, Chemical Engineering and NSF Science and Technology Center: High Performance Polymeric Adhesives and CompositesVirginia Polytechnic Institute and State University, Blacksburg, VA 24061
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Abstract

New organic/inorganic hybrid materials were prepared by hydrolysis and co-condensation of tetramethylorthosilicate (TMOS) with trimethoxysilane functionalized polyimide oligomers via sol-gel ultrastructure processing. In the first reaction step, amine terminated, fully imidized, soluble, high Tg polyimides were prepared from appropriate diamines and dianhydrides by solution imidization techniques. The amine end-groups were then quantitativell derivatized to nadimide structures through reaction with cis-norbornene 2,3 dicarboxylic anhydride. Subsequently, the nadimides were quantitatively derivatized to trimethoxysilane functionalities via hydrosilylation reactions in the presence of chloroplatinic acid catalyst. The resulting hexamethoxy functionalized polyimide oligomers were hydrolyzed and co-condensed at elevated temperatures under mild pressure with TMOS via sol-gel processing to generate thermally stable polyimidesilicate hybrids. The synthesis and characterization of these materials is discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 175: Symposium S – Multifunctional Materials , 1989 , 179
Copyright
Copyright © Materials Research Society 1990

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