Lanthanum aminobenzoate (LAB), cerium aminobenzoate (CAB), and lanthanum and cerium aminobenzoate (LCAB) were synthesized with p‐aminobenzoic acid, lanthanum nitrate, or cerium nitrate as raw materials to study the influence of different rare earth elements on the stability of rare earth stabilizers. The thermal stability of by CAB, LCAB, and LAB toward poly(vinyl chloride) (PVC) was studied. The results of Congo red test and thermal aging test showed when three rare earth stabilizers acted independently, the advantages and disadvantages of thermal stability are as follows: LAB > CAB > LCAB. However, in compound experiments, the thermal stability of composite stabilizers compounded by CAB or LCAB with zinc stearate, calcium stearate, or pentaerythritol (PE) was slightly better than that of composite stabilizers compounded by LAB. Among of them, when the compounding scheme was LCAB:zinc stearate:PE = 1:1:3, the thermal stability time reached 60 minutes; CAB:zinc stearate:PE = 1:1:3, the thermal stability time reached 50 minutes, compared with the rare earth stabilizer alone, the composite thermal stabilizer gave PVC samples better antidiscoloration performance and longer thermal stability time.

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稀土稳定剂用作聚氯乙烯稳定剂的研究

镧氨基苯甲酸甲酯（LAB），铈氨基苯甲酸甲酯（CAB），和镧，铈等氨基苯甲酸酯（LCAB）与合成p以氨基苯甲酸，硝酸镧或硝酸铈为原料，研究了不同稀土元素对稀土稳定剂稳定性的影响。研究了CAB，LCAB和LAB对聚氯乙烯（PVC）的热稳定性。刚果红试验和热老化试验的结果表明，当三种稀土稳定剂独立作用时，热稳定性的优缺点如下：LAB> CAB> LCAB。但是，在复合实验中，CAB或LCAB与硬脂酸锌，硬脂酸钙或季戊四醇（PE）混合的复合稳定剂的热稳定性比LAB混合的稳定剂的热稳定性稍好。其中，配比为LCAB：硬脂酸锌：PE = 1：1：3时，热稳定时间达到60分钟。出租车：