以氯化镧、2-氨基对苯二甲酸、氨水等为原料合成2-氨基对苯二甲酸镧。通过元素分析、红外光谱分析等方法对合成产物进行表征；将2-氨基对苯二甲酸镧与传统稳定剂复配，通过刚果红实验和变色实验研究单一稳定剂以及复合稳定剂对PVC热稳定性能的影响。结果表明，当2-氨基对苯二甲酸镧单独作用时，PVC的热稳定性能提高不大；将2-氨基对苯二甲酸镧与硬脂酸锌和季戊四醇复配，得到了最佳的复合稳定剂，使PVC具有良好的抗变色性和长期热稳定性。

Polyvinyl chloride (PVC) can play an irreplaceable role in many fields,but its thermal stability is poor.Therefore,heat stabilizers must be added in processing PVC.Rare earth-based heat stabilizers have the characteristics of nontoxic,environmental friendly and good compatibility with PVC.Lanthanum aminoterephthalate (LAT) is synthesized with lanthanum chloride,ammonia water and 2-aminoterephthalic acid as raw materials.The synthesized products are characterized by elemental analysis and IR.Respective effects of single stabilizer and composite stabilizers on the thermal stability of PVC are studied through Congo red experiment and discoloration experiment by combining LAT with other traditional stabilizers.The results show that the thermal stability of PVC does not improve greatly when LAT is used as PVC stabilizer alone.The best composite stabilizer is obtained by mixing LAT with zinc stearate and pentaerythritol,which can make PVC have good color resistance and long-term thermal stability.

冯佳萌(1994-),女,硕士研究生,研究方向为稀土功能助剂,17732313693@163.com