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:

1965-11-01

Pagination or Media Count:

16.0

Abstract:

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

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