Application of bio-based diisocyanates with low volatility instead petrochemical diisocyanates has positive impact on environment by reduction of hazardous effects on living organisms and lead to bio-based polyurethanes (bio-PUs) with good usage properties. This work was focused on the synthesis and chosen properties examination of partially bio-based thermoplastic polyurethane elastomers (bio-PUs) obtained using diisocyanate mixtures, polytetrahydrofurane (PolyTHF) and bio-1,3-propanediol (bio-PDO). Two types of diisocyanate mixtures were prepared as follows: aliphatic–aliphatic based on hexamethylene diisocyanate with partially bio-based aliphatic diisocyanate Tolonate™ X FLO 100 (HDI-FLO) and aromatic–aliphatic based on diphenylmethane diisocyanate with partially bio-based diisocyanate (MDI-FLO) with reduction of 25 mass% of petrochemical diisocyanate. Bio-PUs were obtained via prepolymer method. Thermoplastic polyurethane elastomers have been examined in the terms of chemical structure and thermal, thermomechanical, mechanical and physicochemical properties. Bio-PU based on HDI-FLO diisocyanate mixture exhibited higher thermal stability. The beginning of thermal decomposition took a place at lower temperature ca. 30 ºC) and lower rate than the MDI-PU based materials. DMA analysis showed that HDI-FLO based polyurethanes exhibited greater capacity to accumulate energy and higher stiffness. Both materials characterized similar tensile strength and hardness, but with difference that TPU based on HDI-FLO relieved greater elongation at break about 360% reached 813%. Taking into account versatile properties of bio-TPU, these material can find application in many branches of industry.

应用低挥发性的生物基二异氰酸酯代替石化二异氰酸酯通过减少对生物体的有害影响对环境产生积极影响，并导致具有良好使用性能的生物基聚氨酯（bio-PUs）。这项工作的重点是使用二异氰酸酯混合物、聚四氢呋喃 (PolyTHF) 和 bio-1,3-丙二醇 (bio-PDO) 获得的部分生物基热塑性聚氨酯弹性体 (bio-PU) 的合成和选择性能检查。两种类型的二异氰酸酯混合物制备如下：脂肪族-脂肪族基于六亚甲基二异氰酸酯和部分生物基脂肪族二异氰酸酯 Tolonate™ X FLO 100 (HDI-FLO) 和芳香族-脂肪族基于二苯甲烷二异氰酸酯和部分生物基二异氰酸酯 (MDI-FLO)，减少 25 质量%石化二异氰酸酯。Bio-PUs 是通过预聚物方法获得的。热塑性聚氨酯弹性体已在化学结构和热、热机械、机械和物理化学性能方面进行了检查。基于 HDI-FLO 二异氰酸酯混合物的 Bio-PU 表现出更高的热稳定性。热分解的开始发生在较低的温度下。30 ºC) 和低于 MDI-PU 基材料的速率。DMA 分析表明，基于 HDI-FLO 的聚氨酯表现出更大的能量积累能力和更高的刚度。两种材料具有相似的拉伸强度和硬度，但不同的是，基于 HDI-FLO 的 TPU 减轻了更大的断裂伸长率，约 360% 达到 813%。考虑到生物 TPU 的多功能特性，这些材料可以在许多工业分支中找到应用。