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Thermal behavior of dimethyl‐ m ‐carboranyl–dimethylsiloxane copolymers
Author(s) -
Delman A. D.,
Stein A. A.,
Kelly J. J.,
Simms B. B.
Publication year - 1967
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1967.070111014
Subject(s) - carborane , polymer , copolymer , thermogravimetric analysis , siloxane , polymer chemistry , materials science , thermal , volatility (finance) , molecule , chemistry , organic chemistry , composite material , thermodynamics , physics , financial economics , economics
Abstract The manner in which a series of silcarboranylene–siloxane polymers behave in air at elevated temperatures was investigated by thermogravimetric, isothermogravimetric, and differential thermal analyses techniques. Results indicate that methyl pendant groups on the polymers undergo thermal and oxidative degradations at temperatures under 600°C. Final weight losses of the polymers, however, are significantly lower than that shown by dimethylsiloxanes. The reduced volatility is attributed to the inhibition of thermooxidation by the m ‐carboranylene group in the polymer molecules. This protective influence decreases apparently as the distance between the carborane nucleus and the methyl groups increases.