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为了延长暴露于大气环境下聚酯纤维材料的使用周期,研究紫外辐射对聚酯纤维材料结构影响,以填充消光剂、纳米紫外线屏蔽剂等方法来合成聚酯复合纤维材料.通过差示扫描量热仪(DSC)、动态热机械分析仪(DMA)以及分子量测定研究了不同紫外辐射周期对聚酯纤维分子量、机械性质、微观结构等影响.研究结果表明,紫外辐射后的聚酯纤维样品的分子量、强伸度大幅度下降,结晶度有所提高,玻璃化转变温度、熔点均有所降低.而聚酯复合纤维材料的抗辐射效果较聚酯纤维有所改善.消光剂、纳米级紫外线屏蔽剂对辐射过程中的聚酯纤维样品起到了明显的稳定作用,其中纳米紫外线屏蔽剂具有更好的效果.
In order to prolong the service life of the polyester fiber exposed to the atmosphere and study the influence of UV radiation on the structure of the polyester fiber, the polyester fiber composite material was prepared by filling the matting agent, nano-UV screening agent, etc. By differential scanning The effects of different UV radiation cycles on the molecular weight, mechanical properties and microstructure of polyester fibers were studied by means of DSC, DMA and DMA.The results show that the UV radiation of polyester fiber samples The molecular weight, elongation decreased significantly, the degree of crystallinity increased, the glass transition temperature and the melting point decreased, while the polyester composite fiber material had better anti-radiation effect than the polyester fiber.The matting agent, nano-scale UV Shielding agent plays a significant stabilizing effect on the polyester fiber samples during the radiation process, and the nano-UV screening agent has a better effect.