Accession Number:

AD0614473

Title:

SYNTHESIS OF ELASTOMERS CONTAINING SI-N BONDS IN THE MAIN CHAIN.

Descriptive Note:

Final technical rept. for 29 Jun 61-26 Feb 65,

Corporate Author:

MIDWEST RESEARCH INST KANSAS CITY MO

Personal Author(s):

Report Date:

1965-02-26

Pagination or Media Count:

57.0

Abstract:

Methods were sought for the synthesis of thermally and hydrolytically stable elastomers based on chains containing silicon atoms bonded directly to nitrogen. Classes of silazane polymers studied include condensed bisaminosilyldiazasilacyclopentanes, the products of the reaction of N-substituted cyclosilazanes and cyclosiloxazanes with organic diols, and polymers that can be derived from silylpiperazines, p-phenylenebis-alkylaminosilanes, and N-silylated-cyclosilazanes. High molecular weight condensation products of organic diols and N-substituted cyclosilazanes and siloxazanes with reasonably good hydrolytic stability and heat stability were obtained, but a satisfactory crosslinking procedure could not be fond. Methods of synthesis and characterization of monomers are described, and structural modifications necessary to improve the hydrolytic stability of the silazane linkage are defined. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE