This paper describes the synthesis and characterization of high char yield forming nadimide resins. Ten nadimide end-capped oligomeric resins were prepared by reacting endo-5-norbornene-2,3-dicarboxylic acid anhydride (nadic anhydride), 1,3-bis(3-aminobenzamide)/9,9-bis(p-aminophenyl)fluorene-3,3',4,4'- benzophenone tetracarboxylic acid dianhydride/pyromellitic dianhydride/2,2-bis(3,4-dicarboxylphenyl)- hexafluoropropane dianhydride. Structural characterization of resins was performed by elemental analysis, FTi.r. and I H n.m.r. Thermogravimetric studies revealed a multistep decomposition. Cured resins exhibited very high char yields in the range 63 to 77%.
Посилання на статтю:
Effect of structure on thermal behaviour of nadimide resins: 1 / Anju Mathur and I. K. Varma // Polymer. – 1992. – Vol 33. – P. 4845-4850.