环保型二聚酸稀土PVC热稳定剂的研究

采用复分解法制备了二聚酸镧,并通过红外光谱检测证明了其结构;采用刚果红试纸法研究了二聚酸镧的热稳定作用及变色情况;并与其他热稳定剂二聚酸钙、二聚酸锌、硬脂酸镧、硬脂酸钙、硬脂酸锌进行了比较.结果表明二聚酸镧属于长期型热稳定剂,具有良好的热稳定作用,且无毒环保.二聚酸镧与其他热稳定剂具有广泛的协同作用,二聚酸镧与硬脂酸锌并用可有效改善其抑制PVC初期着色的效能.

Study on Rare-Earth Dimer Acid Thermal Stabilizer of Environment-friend for PVC

Lanthanum dimer acid thermal stabilizer was prepared by double decomposition reaction,and its structures were identified by IR.Its effects on thermal stability of PVC were tested by way of Congo Red Method.The stability of lanthanum dimer acid was compared with calcium dimmer acid,zinc dimmer acid,lanthanum stearate,calcium stearate and zinc stearate.Testing results showed that lanthanum dimer acid was the long-term-type thermal stabilizer and had excellent stability.The extensive synergetic effect existed ...