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Characterization of acetylene terminated sulfone (ATS) resin. II. Thermal analysis of the resin
Author(s) -
Stevenson W. T. K.,
Goldfarb I. J.,
Soloski E. J.,
Houtz M. J.
Publication year - 1991
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.1991.070420313
Subject(s) - thermogravimetry , sulfone , differential scanning calorimetry , acetylene , isothermal process , thermogravimetric analysis , materials science , thermosetting polymer , thermal decomposition , polymer chemistry , thermal analysis , chemistry , organic chemistry , thermal , inorganic chemistry , thermodynamics , physics
The kinetics and thermodynamics of the cure and post‐cure reactions of an acetylene terminated sulfone (ATS) resin mixture and pure fractions from that mixture were studied using differential scanning calorimetry. Thermal stabilities were measured by programmed thermogravimetry under helium, and oxidative stabilities using isothermal thermogravimetry in air. Microstructural changes accompanying the cure reaction were identified using infrared spectroscopy. Early products of thermal degradation were trapped for identification and quantitative analysis using the technique of sub‐ambient thermal volatilization analysis. We found that glass transition temperatures increase with crosslink density in the resin, that oxygen is able to copolymerize or couple with the polyenes to produce peroxides or hydroperoxides (respectively) which subsequently decompose to form terminal alcohols on the polyene, that weight loss in air at 600°F is an oxidative process that is insensitive to resin crosslink density, and that sulfone functionality constitutes the thermal weak link in the ATS resin system.