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首页> 外文期刊>Journal of the Serbian Chemical Society >Synthesis and characterization of poly(tetramethylene maleate-co--tetramethylene isophthalate) and poly(tetramethylene fumarate-co--tetramethylene isophthalate)
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Synthesis and characterization of poly(tetramethylene maleate-co--tetramethylene isophthalate) and poly(tetramethylene fumarate-co--tetramethylene isophthalate)

机译：聚（马来酸四亚甲基酯-间苯二甲酸四亚甲基酯）和聚（富马酸四亚甲基酯-间苯二甲酸四亚甲基酯）的合成与表征

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摘要

The reaction of dicarboxylic acid potassium salts with 1,4-dibromobutane in 1-methyl-2-pyrrolidone at moderate temperature, for reaction of polycondensation, was applied to the synthesis of high-molecular-weight copolyesters poly(tetramethylene maleate-co-tetramethylene isophthalate), (PBIM) and poly(tetramethylene fumarate-co-tetramethylene isophthalate), (PBFI). Two series of random unsaturated copolyesters with different degrees of unsaturation, cis or trans configurations, were prepared. The composition of the ester residues of the isolated copolymers was different from the composition of the initial mixtures of the salts, especially in the series of copolyesters based on isophthalic and fumaric acid. This result suggests that the isophthalic acid salt is the most reactive in the reaction of polycondensation, while the fumaric acid salt is least reactive. Some physico-chemical properties of the prepared copolyesters are discussed. In each series of copolyesters the glass transition temperature varies slightly with composition. The copolyesters with a higher content of cis units are highly viscous liquids at ambient temperature and their corresponding trans polymers are partly crystalline polymers which manifest fiber-forming properties.
机译：将二羧酸钾盐与1，4-二溴丁烷在1-甲基-2-吡咯烷酮中在适当温度下反应，以进行缩聚反应，用于合成高分子量共聚酯聚四亚甲基马来酸酯-共-四亚甲基酯间苯二甲酸酯（PBIM）和聚（富马酸四亚甲基酯-间苯二甲酸四亚甲基酯）（PBFI）。制备了两个系列的具有不同不饱和度，顺式或反式构型的无规不饱和共聚酯。分离的共聚物的酯残基的组成与盐的初始混合物的组成不同，尤其是在基于间苯二甲酸和富马酸的一系列共聚酯中。该结果表明，间苯二甲酸盐在缩聚反应中反应性最高，而富马酸盐的反应性最低。讨论了制备的共聚酯的一些物理化学性质。在各系列的共聚酯中，玻璃化转变温度随组成而略有变化。具有较高顺式单元含量的共聚酯在环境温度下为高粘度液体，其相应的反式聚合物为部分结晶的聚合物，表现出成纤性。

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