Accession Number : AD0741257
Title : Thermomechanical Behavior of Poly(carborane-siloxane)s Containing -CB5H5C- Cages.
Descriptive Note : Technical rept. Sep 69-Mar 72,
Corporate Author : PRINCETON UNIV N J DEPT OF CHEMICAL ENGINEERING
Personal Author(s) : Gillham,John K. ; Roller,Mark B.
Report Date : MAR 1972
Pagination or Media Count : 34
Abstract : The first thermomechanical spectra of two new carborane-siloxane polymers containing 5-boron carborane cages in the backbone are reported and discussed. The polymers are: the homopolymer, HO-(Si(CH3)2-CB5H5C-Si(CH3)2-O)(n)H and the random copolymer of the above with twenty mole percent of its 10-boron meta carborane analogue: -(Si(CH3)2-CB10H10C-Si(CH3)2-O)(n). The mechanical spectra (about 1 cps) were determined from -180C to +625C to -180C via the semimicro thermomechanical technique of torsional braid analysis. The T(g)'s indicate an unusually high degree of chain flexibility for a polymer with such bulky groups in its backbone. Their thermal stability in both air and nitrogen were studied. (Author)
Descriptors : (*ELASTOMERS, INORGANIC POLYMERS), (*BORON COMPOUNDS, *INORGANIC POLYMERS), (*SILOXANES, INORGANIC POLYMERS), (*HEAT RESISTANT PLASTICS, INORGANIC POLYMERS), MECHANICAL PROPERTIES, TRANSITION TEMPERATURE, DIFFERENTIAL THERMAL ANALYSIS, THERMOGRAVIMETRIC ANALYSIS, THERMAL STABILITY, OXIDATION, CROSSLINKING(CHEMISTRY)
Subject Categories : Polymer Chemistry
Distribution Statement : APPROVED FOR PUBLIC RELEASE