Qu Dezhi, Cai Jiayang, Huang Fei, Zhang Jinyu, Zuo Huajiang, Sun Shuai, Liu Jinghua, Bai Yongping
College of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou 545006, China.
Guangxi Key Laboratory of Green Processing of Sugar Resources, College of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou 545006, China.
Polymers (Basel). 2022 Jul 27;14(15):3044. doi: 10.3390/polym14153044.
The optical properties of PET have always been a problem that related research has been trying to break through. In the previous work, we modified PET by adding PSLDH (phosphate antioxidant) to obtain a PET film with excellent optical properties. Through non-isothermal crystallization kinetic analysis of modified PET, we hope to verify the conclusion of optical properties by the effect of PSLDH addition on the crystallization properties of PET. PET and PSLDH modified PET were tested by DSC at different cooling rates. The non-isothermal crystallization kinetic process was calculated and analyzed by Jeziorny and Mo methods and the non-isothermal crystallization activation energy was analyzed by Kissinger and Friedman methods by analyzing the DSC curves. The results show that the addition of PSLDH at 0.05 wt% can make the crystallization of PET smaller and slower, which is the same as the case required for excellent optical properties. At the same time, the results can also guide the processing of the optical PET film.
聚对苯二甲酸乙二酯（PET）的光学性能一直是相关研究试图突破的难题。在之前的工作中，我们通过添加磷酸酯抗氧化剂（PSLDH）对PET进行改性，从而获得了具有优异光学性能的PET薄膜。通过对改性PET进行非等温结晶动力学分析，我们希望通过PSLDH的添加对PET结晶性能的影响来验证光学性能的结论。在不同冷却速率下，用差示扫描量热法（DSC）对PET和PSLDH改性的PET进行了测试。通过Jeziorny法和Mo法计算并分析了非等温结晶动力学过程，并通过分析DSC曲线，用Kissinger法和Friedman法分析了非等温结晶活化能。结果表明，添加0.05 wt%的PSLDH可使PET的结晶尺寸更小、速度更慢，这与优异光学性能所需的情况相同。同时，该结果也可为光学PET薄膜的加工提供指导。
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