Accession Number : ADA032463
Title : D2-'meta'-Carborane-Siloxanes. IV. Synthesis of Linear, High Molecular Weight Polymers.
Descriptive Note : Technical rept.,
Corporate Author : UNION CARBIDE CORP TARRYTOWN N Y CORPORATE RESEARCH LAB
Personal Author(s) : Hedaya,E ; Kawakami,J H ; Kwiatkowski,G T ; Kopf,P W ; McNeil,D W
PDF Url : ADA032463
Report Date : 05 Mar 1976
Pagination or Media Count : 33
Abstract : A new facile route to linear, high molecular weight D2-meta-decacarborane-siloxanes was developed based on the condensation reaction between bis-ureidosilanes and carborane disilanol. By using nmr to monitor the reaction stoichiometry, polymers with molecular weight greater than or equal to 250,000 have been prepared. Moreover, because of the mild reaction conditions, structural modifications of the polymer backbone have been readily achieved. These linear high molecular weight polymers overcome the fabrication difficulties encountered in previously prepared D2 polymers.
Descriptors : *Condensation reactions, *Polymerization, Nuclear magnetic resonance, Siloxanes, Synthesis(Chemistry), Polymers, Mechanical properties, Molecular weight, Monomers, Elastomers, Thermal stability, Carboranes, Stoichiometry
Subject Categories : Polymer Chemistry
Elastomers and Rubber
Distribution Statement : APPROVED FOR PUBLIC RELEASE