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首页> 外文期刊>Journal of Applied Polymer Science >High elongation thermoplastic Polyester-urethanes based on widely available diacid intermediates
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High elongation thermoplastic Polyester-urethanes based on widely available diacid intermediates

机译：基于广泛可用的二酸中间体的高伸长率热塑性聚酯-聚氨酯

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摘要

A series of new ,-dihydroxy terminated polyester oligomers are synthesized from the condensation reaction of various aliphatic diols with a mixture of diacids rich in 2-methylglutaric acid, MGA, an abundant and well-defined industrial product. Their adipic acid (AA)-based counterparts are also prepared and the physico-chemical properties of both types of polyols are thoroughly characterized. All these polyester polyols are then used to prepare segmented polyurethanes following a two-stage process, by reacting them successively with 4,4-diphenylmethane diisocyanate, and 1,4-butanediol. The resulting materials are then evaluated with respect to their thermal and dynamic or static mechanical properties. The observed characteristics and behaviors are quite similar between AA- or MGA-based polyurethanes, except for the tendency of AA-based samples to display partially crystallized soft domains. Such a phenomenon is prevented in MGA-based samples because of the methyl side group, resulting in remarkably higher ultimate elongations for the new thermoplastic polyurethanes derived from MGA. (c) 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43410.
机译：由各种脂肪族二醇与富含2-甲基戊二酸的二元酸（MGA）（一种丰富且定义明确的工业产品）的混合物进行缩合反应，合成了一系列新型的二羟基封端的聚酯低聚物。还制备了其基于己二酸（AA）的对应物，并对两种类型的多元醇的理化性质进行了全面表征。然后，通过将它们与4，4-二苯基甲烷二异氰酸酯和1，4-丁二醇相继反应，将所有这些聚酯多元醇用于两步工艺之后，制备链段聚氨酯。然后评估所得材料的热，动态或静态机械性能。在基于AA或基于MGA的聚氨酯之间观察到的特性和行为非常相似，除了基于AA的样品显示出部分结晶的软结构域的趋势。由于存在甲基侧基，因此在基于MGA的样品中避免了这种现象，从而使衍生自MGA的新型热塑性聚氨酯的极限伸长率显着提高。 （c）2016 Wiley Periodicals，Inc. J. Appl。 Polym。科学2016，133，43410。

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