Thermoplastic polyolefins or TPOs are of widespread use in the automotive industry. In this study, the long-term performance of biocarbon based TPOs is investigated for the first time. The durability of these bio-based composites with and without hindered phenolic antioxidants was investigated under accelerated heat aging for 1000 h. Thermo-oxidative degradation was tracked along the specimen’s thickness using energy dispersive spectroscopy. Performance of the biocomposites was gauged by Izod notched impact and tensile properties. Microstructural changes were monitored by differential scanning calorimetry and dynamic mechanical analysis. While the tensile properties were sufficiently sustained using the antioxidants after this test, the impact strength failed to retain initial values. The morphological changes in the β crystal phase were recognized as the primary factor in the reduction of the impact strength of the biocomposites.

热塑性聚烯烃或TPO在汽车工业中得到广泛使用。在这项研究中，首次研究了基于生物碳的TPO的长期性能。在加速加热老化1000小时的条件下，研究了这些含或不含受阻酚类抗氧化剂的生物基复合材料的耐久性。使用能量色散光谱沿着样品的厚度跟踪热氧化降解。生物复合材料的性能通过悬臂梁缺口冲击和拉伸性能进行评估。通过差示扫描量热法和动态力学分析监测微结构变化。在该测试后，使用抗氧化剂可以充分保持拉伸性能，但冲击强度未能保持初始值。