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首页> 外文期刊>Journal of Polymers and the Environment >Investigation of Thermoplastic Polyurethanes Synthesized via Two Different Prepolymers
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Investigation of Thermoplastic Polyurethanes Synthesized via Two Different Prepolymers

机译：通过两种不同的预聚物合成的热塑性聚氨酯的研究

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The man aim of this work was to investigate the effect of the molecular weight of polyols, mixture of prepolymers, and [NCO]/[OH] molar ratio used during the prepolymer chain extending step on the chemical structure, thermomechanical and mechanical properties, and thermal stability of thermoplastic poly(ether-urethane)s In this work thermoplastic poly(ether-urethane)s were synthesized by using polyols with a various molecular weight, 4,4'-diphenylmethane diisocyanate and bio-based glycol. Materials were obtained by a two-step method. The tests were carried out for polyurethanes obtained from a mixture of prepolymers and for reference samples. In the case of materials obtained with using mixture of prepolymers, the ratio of both prepolymers was determined on 50/50 weight percent. Soft segments of materials prepared with using mixture consist of two different polyols. The chemical structure was analyzed using FTIR spectroscopy. The Gaussian deconvolution technique was used to study the hydrogen bonding as well as to decompose carbonyl region of three peaks in various TPUs. The thermal degradation behavior was investigated by using thermogravimetric analysis at heating rates of 10 degrees C/min. It was confirmed that the mixture of prepolymers has an effect of the degree of phase separation, thermal stability and selected properties of synthesized thermoplastic poly(ether-urethane)s.
机译：这项工作的主要目的是研究多元醇的分子量，预聚物的混合物以及在预聚物扩链步骤中使用的[NCO] / [OH]摩尔比对化学结构，热机械和力学性能的影响，以及热塑性聚（醚-氨基甲酸酯）的热稳定性在这项工作中，热塑性聚（醚-氨基甲酸酯）是通过使用具有各种分子量的多元醇4,4'-二苯基甲烷二异氰酸酯和生物基乙二醇合成的。通过两步法获得材料。对由预聚物混合物制得的聚氨酯和参考样品进行了测试。在使用预聚物混合物获得的材料的情况下，两种预聚物的比例确定为50/50重量％。使用混合物制备的软段材料由两种不同的多元醇组成。使用FTIR光谱分析化学结构。高斯反卷积技术用于研究氢键以及分解各种TPU中三个峰的羰基区域。通过使用热重分析以10摄氏度/分钟的升温速率研究热降解行为。证实预聚物的混合物具有相分离度，热稳定性和合成的热塑性聚（醚-氨基甲酸酯）的选择性能的影响。

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