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Thermal degradation behavior of polyamides having 2- and 4-hydroxycinnamic acid dimer components
Authors:Noriyuki Yonezawa  Toshio Kanoe  Kazuhiko Saigo  Masaki Hasegawa
Abstract:Two new types of polyamides having anti head-to-tail hydroxycinnamic acid dimer component in the main chain were synthesized. Their thermal degradation behavior was investigated by TG-DSC analysis in comparison with those of their model compounds and the polyamides derived from anti head-to-head coumarin dimer. The key reactions in the thermal degradation were clarified to be lactonization and cyclic imide formation. The polyamide, derived from 4-hydroxycinnamic acid dimer and hexamethylenediamine, showed good heat stability. © 1993 John Wiley & Sons, Inc.
Keywords:hydroxycinnamic acid dimer  cyclobutanedicarboxamide  coumarin dimer  lactonization  imide  thermal degradation
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