Synthesis and Characterization of Self-Catalyzed Imide-Containing Pthalonitrile Resins

Some new amino and imide-containing phthalo nitrile compounds with 1 1 molar ratio of amino group to pthalonitrile unit were successfully synthesized The molecular structures were characterized by spectroscopic techniques They were thermally polymerized under nitrogen/air even in the ab sence of curing additives The thermal properties of the cured products were characterized by thermogravimetric analysis and differential scanning calorimetry The 5% weight loss tempera tures ranged from 525 to 528 degrees C and 513 to 520 degrees C under nitro gen and air respectively Char yields (900 C) were in the range of 62-70% Rheometric measurements showed that the rate of the cure reaction differs for all the three monomers The glass transition temperature advances with increasing extent of cure and disappears on postcure at 375 degrees C (C) 2010 Wiley Periodicals Inc J Polym Sci Part A Polym Chem 48 5916-5920 2010