The sustainability of the polymeric materials has become a fundamental challenge; therefore, the development of new biobased formulations has gained increasing interest. Thermoset polyurethanes (PURs) present high performance and are a competitive solution for structural composites. However, polyols used in the PUR synthesis are typically from petrochemical origin. Nowdays, a broad range of biobased polyols is available in the market, but there is not yet a specific formulation for high performance PURs composites. The aim of this work was to study the effect of biobased polyols' characteristics in the PUR processing and final properties. In addition, biobased polyol features to synthesize BIO-PURs suitable for structural applications were stablished. The viscosity and reactivity were studied by means of rheology and differential scanning calorimetry (DSC). Thermal and mechanical properties were studied through thermogravimetric analysis (TGA), dynamic mechanical analysis (DMA) and flexural tests. The results obtained demonstrated the dramatic influence of polyols’ nature on BIO-PUR/PUR properties and their effect on the crosslink density. It was observed that using a high functionality and high hydroxyl index biobased polyol, it was possible to synthesize high performance BIO-PUR suitable for structural composites.

聚合材料的可持续性已成为一项根本性挑战；因此，开发新的生物基配方越来越受到关注。热固性聚氨酯 (PUR) 具有高性能，是一种具有竞争力的结构复合材料解决方案。然而，用于 PUR 合成的多元醇通常来自石化产品。现在，市场上有各种各样的生物基多元醇，但还没有针对高性能 PUR 复合材料的特定配方。这项工作的目的是研究生物基多元醇的特性对 PUR 加工和最终性能的影响。此外，还确定了生物基多元醇合成适用于结构应用的 BIO-PUR 的特性。通过流变学和差示扫描量热法 (DSC) 研究粘度和反应性。通过热重分析 (TGA)、动态机械分析 (DMA) 和弯曲试验研究了热性能和机械性能。获得的结果证明了多元醇的性质对 BIO-PUR/PUR 特性及其对交联密度的影响有显着影响。据观察，使用高官能度和高羟基指数的生物基多元醇，可以合成适用于结构复合材料的高性能 BIO-PUR。获得的结果证明了多元醇的性质对 BIO-PUR/PUR 特性及其对交联密度的影响有显着影响。据观察，使用高官能度和高羟基指数的生物基多元醇，可以合成适用于结构复合材料的高性能 BIO-PUR。获得的结果证明了多元醇的性质对 BIO-PUR/PUR 特性及其对交联密度的影响有显着影响。据观察，使用高官能度和高羟基指数的生物基多元醇，可以合成适用于结构复合材料的高性能 BIO-PUR。