SEMI-INORGANIC HEAT RESISTANT ELASTOMERS BASED ON BORON.
ARMY WEAPONS COMMAND ROCK ISLAND ILL RESEARCH AND ENGINEERING DIV
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The preparation of high temperature resistant elastomers containing boron was attempted. A copolymer obtained from dimethyldichlorosilane and 1,12,2-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
- Elastomers and Rubber