Synthesis, characterization, and properties of a new polyurethane elastomer based on tragacanth gum polysaccharide

Journal of Elastomers & Plastics Pub Date : 2022-10-01 DOI:10.1177/00952443221107358

Elham Badakhshanian, M. Ghaemy

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引用次数: 2

Abstract

This study prepared a type of bio-based elastomeric polyurethane from tragacanth gum (TG). TG is a natural polysaccharide with many hydroxyl groups that can be used as a chain extender and a crosslinker to react with the isocyanate groups in polyurethane prepolymer to form a highly branched and crosslinked polyurethane with high molecular weight and good mechanical properties. The chemical structure of the prepolymer and the thermal and mechanical properties of the prepared polyurethane were studied by Fourier transform infrared, nuclear magnetic resonance, scanning electron microscopy, thermal gravimetric analysis, dynamic mechanical thermal analysis, and tensile strength tester. The properties of the polyurethane-based on TG (TG-PU) were compared with the properties of the PU based on only polyethylene glycol. The TG-PU sample with 0.5 g TG showed a tensile strength of 288% and the glass transition temperature (Tg) of 33% higher than the tensile strength and Tg of PU without TG. We expect these findings to widen the range of preparation and applications of bio-based polyurethane materials. Graphical Abstract

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一种新型黄花胶多糖聚氨酯弹性体的合成、表征及性能研究

本研究以黄棘胶为原料制备了一种生物基弹性聚氨酯。TG是一种具有许多羟基的天然多糖，可作为扩链剂和交联剂与聚氨酯预聚物中的异氰酸酯基团反应，形成高支链交联的聚氨酯，具有高分子量和良好的力学性能。采用傅里叶变换红外、核磁共振、扫描电镜、热重分析、动态力学热分析和拉伸强度测试仪等对预聚物的化学结构和制备的聚氨酯的热力学性能进行了研究。比较了TG基聚氨酯(TG-PU)与纯聚乙二醇基聚氨酯的性能。添加0.5 g TG的TG-PU试样的抗拉强度和玻璃化转变温度(TG)比未添加TG的PU试样的抗拉强度和TG分别提高了288%和33%。我们期望这些发现能拓宽生物基聚氨酯材料的制备和应用范围。图形抽象

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Journal of Elastomers & Plastics

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