Zhang Jun-qing
2013
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Journal
Journal of Southwest University of Science and Technology
Abstract
2,2-Bis(3-amino-4-hydroxyphenyl)hexafluoropropane(3),which could be used for the preparation of fluorine-containing polybenzoxazoles,was synthesized by nitration and reduction starting from bisphenol AF.Reaction of compound 3 with equivalent terephthaloyl chloride gave poly(o-hydroxyamide) 5,which was further dehydrated at a high temperature giving fluorine-containing polybenzoxazole 6.The nitration product 2 of bisphenol AF and compound 3 were determined by FTIR,ESI-MS,and 1HNMR,and polymers 5 and 6 were characterized by FT-IR.TG indicates that polymer 6 has a good thermal stability with a 5% weight loss temperature of 530 ℃ and a thermal degradation temperature of 573 ℃,respectively in nitrogen.