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由对苯二甲酰氯 ( TPC)和二甲基联苯胺 ( DMBD)和双酚 A( BPA)合成了三元无规全芳聚酯酰胺 ( PEA)。用DSC、X光衍射分析和偏光显微镜等手段表征了该类聚合物的热致液晶性质 ,确认了不同单体比例的 PEA均为热致向列型液晶聚合物 ,且不出现液晶相转变温度直至聚合物分解。由于 PEA中聚酰胺链段之间的氢键作用 ,PEA的熔融温度随 DMBD的比例增加而升高 ,即使 DMBD链单元为 2 0 % ( mol)的 PEA,其熔融温度仍高达 345℃。
Ternary random fullerene polyesteramide (PEA) was synthesized from terephthalyl chloride (TPC) and dimethylbenzidine (DMBD) and bisphenol A (BPA). The thermotropic liquid crystal properties of these polymers were characterized by means of DSC, X-ray diffraction and polarized light microscope. It was confirmed that the PEAs with different monomer ratios were all thermotropic nematic liquid-crystalline polymers, and the liquid crystal phase transition temperature Until the polymer is decomposed. Due to the hydrogen bonding between the polyamide segments in PEA, the melting temperature of PEA increased with the increase of DMBD. The melting temperature of PEA was still up to 345 ℃, even though 20 mol% of DMBD chain units.