作者：李苗，梁耀东，李侃社等
关键字：N-(2-amino ethyl) maleamic acid radical；Lanthanum (III)； Polyvinyl chloride (PVC)； Heat stabilizer； Thermogravimetric analysis (TGA)
论文来源：期刊
具体来源：Polymer Degradation and Stability
发表时间：2016年

The complex (LaL₃) of lanthanum (III) with N-(2-amino ethyl) maleamic acid radical (L
) was synthesized and characterized by Fourier infrared spectrum (FT-IR), elemental analysis and melting point measure-ments. The complex LaL3 was a chelate, in which lanthanum (III) ion was coordinated with the carboxylate oxygen and amide nitrogen atoms of N-(2-amino ethyl) maleamic acid radical (L
). The stabilization effect of LaL₃ as a thermal stabilizer on polyvinyl chloride (PVC) was evaluated by static thermal stability test, ultravioletevisible spectrum (UVevis), FT-IR and thermogravimetric analysis (TGA). The results showed that the addition of LaL₃ as thermal stabilizer could signi?cantly enhance static stability time of PVC. Compared with the TG of pure PVC and LaL₃/PVC, within the range of 200~300^oC, the degradation rate of pure PVC was signi?cantly accelerated, whereas the degradation rate of the PVC added LaL₃ stabilizer decreased obviously. The stabilizing ef?ciency of PVC improved by the addition of LaL₃ is partially attributed by the formation of coordinate bonds between lanthanum (III) and

chloride atoms in PVC main chain.