【摘要】 由对乙酰氧基苯甲酸、对苯二酚二乙酯、2,6-萘二甲酸及间苯二甲酸四种单体通过熔融缩聚反应,合成了全芳香族四组分共聚酯。在一定的组成范围内,共聚酯熔体有很好的液晶性。本文重点讨论了聚合物的组成与性质的关系,热谱特征和液晶相行为。更多还原

【Abstract】 The wholly aromatic four-component copolyesters were prepared from p-acetoxy-benzoic acid, hydroquinone diacetate, 2,6-naphthalene dicarboxylic acid and isophthalic acid by melting polycondensation. The melted copolyesters exhibit good liquid crystal-linity in some range of the copolyester compositions.The relationship of composition and properties, DSC thermogram characters and mesomorphic behavior were discussed.更多还原