喷气燃料对热塑性聚氨酯热性能的影响研究

Effect of jet fuel on thermal properties of thermoplastic polyurethane

由于具有优秀的抗磨损能力和耐溶剂性,热塑性聚氨酯已被大量用于石油产品的储存和运输中。在喷气燃料的储输油过程中热塑性聚氨酯设备会面临各种复杂的运输环境,在这一过程中,聚氨酯软管可能会受到喷气燃料和紫外线的双重影响。若这种影响导致了它们的热学特性不再符合需求,会造成经济损失与环境问题。在储运过程中喷气燃料对TPU热性能的影响是不可忽视的,因此本研究使用差示扫描量热仪及热失重分析仪对经过喷气燃料及紫外光辐照处理后的热塑性聚氨酯进行测试,发现喷气燃料的长期浸泡会导致聚氨酯玻璃化转变温度的提升和热稳定性的下降,TPU样品经过喷气燃料处理后的DSC曲线在150℃后出现了1个放热峰,这表明此处存在结晶行为。

Thermoplastic polyurethane(TPU)elastomers have been widely used in the storage and transportation of petroleum products due to their excellent wear resistance and solvent resistance.During the storage and transportation processes of jet fuel,The TPU equipment has to face various complex transportation environments.In such processes,the TPU hoses may be affected by the dual effects of jet fuel and ultraviolet radiation.If this impact causes their thermal characteristics to no longer meet the demand and results in an economic loss and environmental problems.Therefore,the impact of jet fuel on the thermal performance of TPU during storage and transportation cannot be ignored.In this study,differential scanning calorimetry and thermogravimetry analysis were conducted to investigate the thermal performance of the TPU treated with jet fuel and UV irradiation.The results indicated that a long‑term immersion in jet fuel led to an increase in the glass transition temperature and a decrease in the thermal stability of TPU.After treatment with jet fuel,the TPU samples exhibited an exothermic peak at 150℃as a result of the presence of crystallization.