Developing polybutylene terephthalate (PBT) with high thermal stability and flame-retardant properties is crucial for automotive, biomedical devices, electronics, and other fields. Herein, we focus on a PBT/brominated epoxy resin (BEO)/nano-Sb₂O₃ composites by a melt-blending method. The effects of heating rate and nano-Sb₂O₃ content on the thermal stability and thermal degradation kinetics of PBT composites were studied by TG-DSC. With the increasing of heating rate, the thermal hysteresis effect of temperature gradient is produced, which is eliminated when the temperature exceeds 400°C. With the increase of nano-Sb₂O₃ content, the of PBT/BEO/nano-Sb₂O₃ composites increases at first and then decreases. When the content of nano-Sb₂O₃ is 3 wt%, the of PBT/BEO/nano-Sb₂O₃ is the highest, which is 66.18 kJ/mol (31.43%) higher than that of neat PBT. Also, the exploration of the thermal degradation kinetics of PBT/BEO/nano-Sb₂O₃ composites is expected to provide research ideas for new high flame-retardant materials.

中文翻译：

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PBT / BEO /纳米Sb2O3复合材料的制备及热降解动力学

开发具有高热稳定性和阻燃性的聚对苯二甲酸丁二醇酯（PBT）对于汽车，生物医学设备，电子产品和其他领域至关重要。在本文中，我们专注于通过熔融共混法的PBT /溴化环氧树脂（BEO）/纳米Sb ₂ O ₃复合材料。TG-DSC研究了升温速率和纳米Sb ₂ O ₃含量对PBT复合材料热稳定性和热降解动力学的影响。随着加热速率的增加，产生了温度梯度的热滞效应，当温度超过400℃时，该现象被消除。随着纳米Sb ₂ O ₃含量的增加，PBT / BEO /纳米Sb ₂O ₃复合材料先增加然后减少。当纳米Sb ₂ O ₃的含量为3 wt％时，PBT / BEO /纳米Sb ₂ O _3的含量最高，比纯PBT高66.18 kJ / mol（31.43％）。此外，对PBT / BEO /纳米Sb ₂ O ₃复合材料的热降解动力学的探索有望为新型高阻燃材料提供研究思路。