聚碳酸酯材料耐热氧老化性能的研究

Research on Polycarbonate Anti-aging Property

通过热老化实验和多次基础实验,评估不同抗氧剂,包括主抗氧剂和辅助抗氧剂对聚碳酸酯耐热老化性能的影响。实验结果表明,较传统抗氧剂,添加受阻酚类主抗氧剂AO-1后聚碳酸酯135℃老化168h后的YI变化值只有3.66;添加亚磷酸酯类辅助抗氧剂AO-5后聚碳酸酯多次挤出测试后熔体流动速率变化只有3.68;添加硫代酯类辅助抗氧剂AO-6后聚碳酸酯135℃老化168h后的YI变化值只有1.03;AO-1+AO-5+AO-6是提升聚碳酸酯长效热稳定性和加工稳定性最优搭配。

In order to evaluate the effect of different antioxidants including primary and secondary ones on the thermal stability of polycarbonate materials,we conducted anti-aging and multiple extrusion tests.The testing results showed that the hindered phenol primary antioxidant AO-1 effectively improved the thermal stability of polycarbonate by YI difference 3.66 after 135℃/168 h tests,the phosphite secondary antioxidant AO-5 effectively improved the processing stability of polycarbonate by MFI difference 3.68 after multiple extrusion tests,and the secondary antioxidant thioester AO-6 effectively improved the long term thermal stability of polycarbonate by YI difference 1.03 after 135℃/168 h tests.In conclusion,AO-1+AO-5+AO-6 is the best combination to improve the long-term thermal stability and processing stability of polycarbonate.