Accession Number : AD0474092

Title :   ELASTOMERIC AND MECHANICAL PROPERTIES OF POLY-M-CARBORANYLENESILOXANES.

Descriptive Note : Technical rept.,

Corporate Author : PRINCETON UNIV NJ FRICK CHEMICAL LAB

Personal Author(s) : Sperling, Leslie H. ; Cooper, Stuart L. ; Tobolsky, Arthur V.

Report Date : NOV 1965

Pagination or Media Count : 25

Abstract : A new high-temperature elastomer, SiB-2, was investigated by stress relaxation, modulus-temperature, and volume-temperature techniques. SiB-2 was found to be more stable than a related elastomer, radiation-cured silicone rubber, having about twice as long a chemical relaxation time at 250 C. Possible mechanisms to account for this increased stability are discussed. At low temperatures, the glass transition temperature for SiB-2 was estimated at -34 C, which compares well with the inflection temperature of 30 C for this polymer. The melting transition temperature for SiB-2 was estimated to be +56 C. (Author)

Descriptors :   *SILICONE PLASTICS), (*HEAT RESISTANT PLASTICS, (*POLYMERS, HEAT RESISTANT PLASTICS), ELASTOMERS, ORGANOBORANES, DECABORANES, STABILITY, PHASE STUDIES, TRANSITION TEMPERATURE, MELTING, MECHANICAL PROPERTIES, RELAXATION TIME, STRESSES, COPOLYMERIZATION, HIGH TEMPERATURE.

Subject Categories : Polymer Chemistry
      Plastics

Distribution Statement : APPROVED FOR PUBLIC RELEASE