Accession Number : AD0289547

Title :   A STUDY OF POLYMERS CONTAINING SILICON-NITROGEN BONDS

Corporate Author : SOUTHERN RESEARCH INST BIRMINGHAM ALA

Personal Author(s) : BURKS,ROBERT E. JR. ; RAY,THOMAS W.

Report Date : 20 FEB 1961

Pagination or Media Count : 1

Abstract : It was shown that the silazanes either have or can be converted to materials that have the following encouraging properties: a wide variety of physical states including mobile liquids, oils, greases, elastomers, and vitreous solids; a high degree of thermal and chemical stability in comparison with siloxanes and flurocarbons. Two separate areas of silicon-nitrogen chemistry were explored: the reaction of ammonia with silicon tetrachloride and tetraethylorthosilicate and the reaction of ammonia and amines with dichlorosilanes to produce silazanes. A silazane made from ethylenediamine can be converted to an elastomer that is resilient at -78 C and after heating at 450 C. Hexaphenylcyclotrisilazane and a mixture of methylphenyl silazanes can be converted to vitreous solids having even greater thermal stability. Blends of these three silazanes can be made into various types of flexible coatings that adhere well to metals and other surfaces. These coatings are essentially inert to organic solvents and aqueous acids and alkalis. (Author)

Descriptors :   *NITROGEN COMPOUNDS, *POLYMERS, *SILICON COMPOUNDS, AMMONIA, CATALYSTS, CHEMICAL ANALYSIS, CHEMICAL REACTIONS, ELASTOMERS, ETHYLENEAMINES, FILMS, HEAT RESISTANT PLASTICS, HYDROLYSIS, METHYL RADICALS, ORGANIC COMPOUNDS, ORGANIC SOLVENTS, PHENYL RADICALS, PHYSICAL PROPERTIES, POLYMERIZATION, SILANES, SILICATES, SILICON COATINGS, SOLIDS, STABILITY

Distribution Statement : APPROVED FOR PUBLIC RELEASE