The synthesis, characterization, and thermal properties of partially renewable poly(butylene terephthalate) copolyesters containing alditol units are described. These copolyesters were obtained by polycondensation in solution from mixtures of 1,4-butanediol and 2,3-di-O-benzyl-L-threitol with terephthaloyl chloride. Copolyesters with weight-average molecular weights oscillating between 4 000 and 12 000 g·mol⁻¹ and dispersities around 1.5 were obtained. All them had a random microstructure and were thermally stable well above 300°C. Copolyesters containing up to 30% of dibenzyl threitol units were found to be crystalline and to adopt the same crystal structure as the parent homopolyester poly(butylene terephthalate). The melting temperature and crystallinity were observed to decrease, and the glass transition temperature to increase, with increasing amounts of alditol units incorporated in the copolyester. Furthermore, the crystallizability was depressed by copolymerization.

描述了含有糖醇单元的部分可再生聚（对苯二甲酸丁二醇酯）共聚酯的合成、表征和热性能。这些共聚酯是通过在溶液中由 1,4-丁二醇和 2,3-二-O-苄基-L-苏糖醇与对苯二甲酰氯的混合物缩聚而获得的。重均分子量在 4 000 和 12 000 g·mol ^-1之间波动的共聚酯并且获得了大约 1.5 的分散度。它们都具有随机的微观结构，并且在 300°C 以上具有良好的热稳定性。发现含有高达 30% 的二苄基苏糖醇单元的共聚酯是结晶的，并采用与母体均聚酯聚（对苯二甲酸丁二醇酯）相同的晶体结构。观察到熔化温度和结晶度降低，并且玻璃化转变温度升高，随着共聚酯中掺入的糖醇单元的量增加。此外，共聚降低了结晶性。