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本文用对苯二甲酰氯、对苯二酚、己二醇及分子量为1000或2000的聚丁二醇醚,经溶液缩聚制备了嵌段聚醚聚酯,其介晶单元含量只为21.2重量％(或37.5mol％)即可在宽的温度范围内呈现明显的液晶性.~1H-NMR谱表明,产物的聚酯段呈嵌段微观序列分布.
In this paper, polytetramethylene glycol ether with molecular weight of 1000 or 2000 was prepared by polycondensation of terephthaloyl chloride, hydroquinone, hexylene glycol and polybutylene terephthalate. The content of mesogenic unit was only 21.2 wt% % (Or 37.5mol%) to show obvious liquid crystallinity over a wide range of temperatures.1H-NMR spectra showed that the polyester segments of the product were distributed in block microscopic sequence.