Abstract
Lignin is one kind of natural anti-ultraviolet polymer of polyphenol which contains hydroxyl groups and carbonyl groups. Therefore, lignin has the potential to be used as anti-ultraviolet aging additives. The anti-ultraviolet aging efficiency of lignin in the thermoplastic polyester elastomer (TPEE)-based composites was investigated in this study. Fourier Transform Infrared Spectroscopy (FTIR) was used to characterize the chemical structure of lignin and TPEE/lignin composites, thermogravimetric analyzer (TGA) and differential scanning calorimeter (DSC) were used to characterize the thermodynamic properties of TPEE/lignin composites. The mechanical properties of TPEE/lignin composites before and after aging experiments were compared. The experimental results show that the mechanical properties of TPEE/lignin composites did hardly change by addition of lignin. And the residual rate of mechanical properties of the TPEE/lignin composites still reached the highest 80.9% after ultraviolet irradiation for 200 h. The results indicated that lignin has potential to improve the UV resistance of TPEE.
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