Thermal, oxidative and radiation stability of polyimides I. Bismaleimidoethane and different diamine-based polyimides
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The syntheses of 1,2-ethane-bis-maleamidoacid, N,N-1,2-bis-maleimidoethane (BME), and polyimide resins based on BME and four different diamines are given. The thermal and thermooxidative stability of the resins was studied by thermogravimetry (TG) following parameters such as temperatures for defined weight loss and initial decomposition rate, i.e. shape of TG and first derivative TG curves. Samples have been irradiated and their radiation stability evaluated on the basis of the thermal and thermooxidative behavior of the irradiated samples. The thermal behaviors have been analyzed and the resin based on the diamine with the benzene ring showed the best thermal stability. Radiation in the applied dose range showed an increase of thermal stability. (C) 2000 Elsevier Science Ltd. All rights reserved.
Извор:Polymer Degradation and Stability, 2000, 67, 3, 547-552
ISSN: 0141-3910 (print)