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本文以间苯二酚为原料,合成了缩聚单体4,6-二胺基1,3-间苯二酚盐酸盐。在多聚磷酸介质中与对苯二甲酸经分段升温缩聚得聚苯撑苯并二噁唑(PBZO).用元素分析法,X-光衍射法、X-光平板照相、FTIR和C~(13)-NMR研究了PBZO的结构.测定了PBZO/MSA体系的特性粘数。测定了PBZO的力学性能和热稳定性。结果表明PBZO是继PBZT后又一种新型的高性能液晶高分子材料。
In this paper, resorcinol as raw materials, condensation polymerization monomer 4,6-diamino-1,3-resorcinol hydrochloride. Poly (phenylene) benzobisoxazole (PBZO) was polycondensed with terephthalic acid via stepwise temperature increase in polyphosphoric acid medium.Using the methods of elemental analysis, X-ray diffraction, X-ray plain photography, FTIR and C ~ (13) -NMR The structure of PBZO was studied, and the intrinsic viscosity of PBZO / MSA system was measured. The mechanical properties and thermal stability of PBZO were measured. The results show that PBZO is a new type of high performance liquid crystal polymer material following PBZT.