Accession Number:

AD0294196

Title:

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

Descriptive Note:

Corporate Author:

MIDWEST RESEARCH INST KANSAS CITY MO

Personal Author(s):

Report Date:

1962-12-21

Pagination or Media Count:

1.0

Abstract:

Polymers containing silicon and nitrogen in the main chain with intrinsic viscosities in toluene up to 1.6 have been prepared by the condensation of hexamethylcyclotrisilazane with bisphenol A. When 4,4-dihydroxyphenyl is used as the diol, polymers with improved thermal stability are obtained. The screening of various other monomer compositions is described. The great stability of small ring silicon-nitrogen compounds under the influence of acidic and basic catalysts is demonstrated in a variety of experiments however, some conversion of octamethylcyclotetrasilazane to hexamethylcyclotrisilazane was observed at 175 degrees in the presence of aluminum or ferric chloride. Author

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Distribution Statement:

APPROVED FOR PUBLIC RELEASE