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首页> 外文期刊>Journal of Applied Polymer Science >Carbohydrate-Based Poly(ester-urethane)s: A Comparative Study Regarding Cyclic Alditols Extenders and Polymerization Procedures
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Carbohydrate-Based Poly(ester-urethane)s: A Comparative Study Regarding Cyclic Alditols Extenders and Polymerization Procedures

机译：基于碳水化合物的聚（酯-氨基甲酸酯）：关于环状醛糖醇增量剂和聚合程序的比较研究

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摘要

A set of segmented poly(ester-urethane)s were prepared from diisocyanates HDI or MDI and using 1,4-butanediol and D-glucose-derived cyclic diols (14 : 3,6-dianhydro-D-glucitol (isosorbide) or 2,4;3,5-di-O-methylidene-D-glucitol (gludioxol) or mixtures of them) as extenders. Hydroxyl end-capped polycaprolactone with a molecular weight of 3000 g.mol(-1) was used as soft segment. Two polymerization methods, in solution and in bulk, were applied for the synthesis of these poly(ester-urethane)s. The influence of the preparation procedure and composition in cyclic extender on synthesis results, structure, and properties of the novel poly(ester-urethane)s was comparatively evaluated and discussed. The effect of replacement of 1,4-butanediol by isosorbide or gludioxol on hydrodegradability was also assessed; the hydrolysis rate increased noticeably with the presence of glucitol derived units, although degradation of the polymers took place essentially by hydrolysis of the polyester soft segment.
机译：由二异氰酸酯HDI或MDI并使用1,4-丁二醇和D-葡萄糖衍生的环状二醇（14：3,6-二脱水-D-葡萄糖醇（异山梨酯）或2 ; 4; 3; 5-二-O-亚甲基-D-葡萄糖醇（葡糖醇）或它们的混合物作为增量剂。分子量为3000 g.mol（-1）的羟基封端的聚己内酯用作软链段。溶液和本体两种聚合方法被用于合成这些聚（酯-氨基甲酸酯）。对比评价和讨论了制备方法和循环扩链剂组成对新型聚（酯-氨基甲酸酯）合成结果，结构和性能的影响。还评估了异山梨醇或丁二酚替代1,4-丁二醇对加氢降解能力的影响。尽管聚合物的降解基本上是通过聚酯软链段的水解而发生的，但是在存在葡萄糖醇衍生的单元的情况下，水解速率明显增加。

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