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Rheological properties and dynamic thermal stability of PVC/La L2/Ca-Zn composite stabilizer
Journal of Vinyl and Additive Technology ( IF 3.8 ) Pub Date : 2022-01-13 , DOI: 10.1002/vnl.21891 Deling Li 1 , Congcong Luo 1 , Bing Yao 1 , Yue Ding 1 , Jizhen Ren 1
Journal of Vinyl and Additive Technology ( IF 3.8 ) Pub Date : 2022-01-13 , DOI: 10.1002/vnl.21891 Deling Li 1 , Congcong Luo 1 , Bing Yao 1 , Yue Ding 1 , Jizhen Ren 1
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Lanthanum complex with curcumin (La L2)/Ca-Zn composite stabilizer was prepared using La L2 and Ca-Zn stabilizer, in which Ca-Zn stabilizer was obtained from calcium stearate and zinc stearate at their mass ratio of 5:1. The rheological properties and dynamic thermal stability of polyvinyl chloride (PVC) stabilized by La L2/Ca-Zn composite stabilizers were estimated through a torque rheometer. The degraded fragments obtained from the torque experiments were measured by Fourier-transform infrared spectroscopy (FTIR) and ultraviolet–visible (UV-vis) spectroscopy. La L2 had an effective synergistic effect with Ca-Zn stabilizer. Compared with La L2, La L2/Ca-Zn composite stabilizer could more significantly improve the rheological properties and dynamic thermal stability of PVC. An optimal synergistic effect could be observed when the mass ratio of La L2 with Ca-Zn stabilizer was about 8:2, in which the plasticizing torque and equilibrium torque of PVC was 33.3 N m and 22.5 N m, respectively, and its dynamic thermal stabilizing time was 25.1 min. The possible thermal stability mechanism of La L2/Ca-Zn composite stabilizer for PVC was suggested based on the evaluation of FTIR spectroscopy and UV-vis spectroscopy.
中文翻译：
PVC/La L2/Ca-Zn复合稳定剂的流变性能和动态热稳定性
以La L 2和Ca-Zn稳定剂为原料制备了姜黄素镧络合物(La L 2 )/Ca-Zn复合稳定剂，其中Ca-Zn稳定剂由硬脂酸钙和硬脂酸锌按5:1的质量比得到。通过扭矩流变仪对La L 2 /Ca-Zn复合稳定剂稳定的聚氯乙烯（PVC）的流变性能和动态热稳定性进行了评估。通过傅里叶变换红外光谱 (FTIR) 和紫外 - 可见 (UV-vis) 光谱测量从扭矩实验中获得的降解片段。La L 2与Ca-Zn稳定剂具有有效的协同作用。与La L 2相比，La L 2/Ca-Zn复合稳定剂能更显着地改善PVC的流变性能和动态热稳定性。当 La L 2与 Ca-Zn 稳定剂的质量比约为 8:2 时，可以观察到最佳的协同效应，其中 PVC 的塑化扭矩和平衡扭矩分别为 33.3 N·m 和 22.5 N·m，其动态热稳定时间为 25.1 分钟。通过对FTIR光谱和UV-vis光谱的评价，提出了PVC用La L 2 /Ca-Zn复合稳定剂可能的热稳定性机理。
更新日期：2022-01-13
中文翻译：
PVC/La L2/Ca-Zn复合稳定剂的流变性能和动态热稳定性
以La L 2和Ca-Zn稳定剂为原料制备了姜黄素镧络合物(La L 2 )/Ca-Zn复合稳定剂，其中Ca-Zn稳定剂由硬脂酸钙和硬脂酸锌按5:1的质量比得到。通过扭矩流变仪对La L 2 /Ca-Zn复合稳定剂稳定的聚氯乙烯（PVC）的流变性能和动态热稳定性进行了评估。通过傅里叶变换红外光谱 (FTIR) 和紫外 - 可见 (UV-vis) 光谱测量从扭矩实验中获得的降解片段。La L 2与Ca-Zn稳定剂具有有效的协同作用。与La L 2相比，La L 2/Ca-Zn复合稳定剂能更显着地改善PVC的流变性能和动态热稳定性。当 La L 2与 Ca-Zn 稳定剂的质量比约为 8:2 时，可以观察到最佳的协同效应，其中 PVC 的塑化扭矩和平衡扭矩分别为 33.3 N·m 和 22.5 N·m，其动态热稳定时间为 25.1 分钟。通过对FTIR光谱和UV-vis光谱的评价，提出了PVC用La L 2 /Ca-Zn复合稳定剂可能的热稳定性机理。
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