Accession Number : AD0626581

Title :   SEMI-INORGANIC HEAT RESISTANT ELASTOMERS BASED ON BORON.

Descriptive Note : Technical rept.,

Corporate Author : ARMY WEAPONS COMMAND ROCK ISLAND ILL RESEARCH AND ENGINEERING DIV

Personal Author(s) : Wiedenmann,L. G.

Report Date : NOV 1965

Pagination or Media Count : 16

Abstract : The preparation of high temperature resistant elastomers containing boron was attempted. A copolymer obtained from dimethyldichlorosilane and 1,1':2,2'-bis- (chloromethylsilylene) -bis 1,2-dicarbadodecaborane (12) cured into a resin. An air oven aged sample showed an equilibrium weight loss of 9 percent at 316C (40 hours) and 23 percent at 450C (2 hours). An elastomeric chain copolymer (MW 68,000) obtained from the reaction of bis (chlorodimethylsilyl) 1,7-dicarbadodecaborane with octamethyl cyclotetrasiloxane lost its elasticity after air oven aging 2.5 hours at 316C (weight loss 7.3 percent). (Author)

Descriptors :   (*HEAT RESISTANT PLASTICS, BORANES), (*ELASTOMERS, BORANES), (*INORGANIC POLYMERS, BORANES), (*BORON COMPOUNDS, COPOLYMERIZATION), CHLORINE COMPOUNDS, SILANES, SILOXANES, ELASTIC PROPERTIES, VULCANIZATION, AGING(MATERIALS)

Subject Categories : Elastomers and Rubber

Distribution Statement : APPROVED FOR PUBLIC RELEASE