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