热塑性聚氨酯耐油抗紫外老化性能改进研究

Study on Improvement of UV Aging Resistance of Thermoplastic Polyurethane After Oil Treatment

提高热塑性聚氨酯(TPU)胶层在油料抽提后的抗紫外老化性能对软质油料储、运设备的户外应用具有重要意义。本工作以无机抗紫外老化助剂金红石型纳米二氧化钛(TiO_(2))与高分子受阻胺光稳定剂622(HALS-622)为添加剂,与TPU共混后制备薄膜,经过油料抽提后进行300 h紫外老化。通过紫外-可见光谱、红外光谱定性与定量分析、力学性能与色差分析测试,结果表明,油料作用下,HALS-622会部分被抽提出并溶解,影响TPU的耐油抗紫外老化性能,TPU/TiO_(2)样品在紫外老化后具有更小的色差变化与更稳定的力学性能。本研究细化了TPU在石油化工领域的应用探索,同时为TPU耐油抽提抗紫外老化性能的改进提供了实验依据。

Improving the UV aging resistance of thermoplastic polyurethane elastomer(TPU)adhesive layer after oil extraction is of great significance for outdoor application of soft oil storage and transportation equipment.In this work,the inorganic anti UV aging additive rutile nano titanium dioxide(TiO_(2))and polymer hindered amine light stabilizer 622(HALS-622)were used as additives to blend with TPU to prepare films.After oil extraction,the films were subjected to UV aging for 300 h.Through UV visible spectrum,qualitative and quantitative analysis of infrared spectrum,mechanical properties and color difference analysis and testing,the results show that HALS-622 would be partially extracted and dissolved under the action of oil,which affected the oil resistance and UV aging resistance of TPU.TPU/TiO_(2) samples have smaller color difference changes and more stable mechanical properties after UV aging.This study refined the application of TPU in petrochemical industry,and provided an experimental basis for the improvement of oil extraction and UV aging resistance of TPU.