橡胶籽油基复合型环保增塑剂用于PVC的研究

将自制的橡胶籽油基环氧脂肪酸甲酯（EFAME）与对苯二甲酸二辛酯（DOTP）混合后，与聚氯乙烯（PVC）共混成型，考查EFAME在软质PVC中的增塑性能及其对DOTP的替代效果。利用拉力试验机、差示扫描量热仪、动态热力学分析仪及热老化烘箱对塑化体系的力学性能、加工性能、耐热性及耐久性进行分析。结果表明，复合型增塑剂可有效改善PVC制品的柔韧性、耐磨性、热性能及加工流变性；EFAME用量为20份时，PVC制品的玻璃化转变温度由0.32 ℃降低至-4.63 ℃，质量损失10 % 和50 %时的温度得到提高，热老化整体变色时间提高了4倍。

Study on a Mixed Environmentally Friendly Plasticizer for PVC from Rubber Seed Oil

A self-made rubber seed oil based epoxy fatty acid methyl ester plasticizer (EFAME) and dioctyl terephthalate (DOTP) were used in PVC as a mixed plasticizer. One purpose of the study was to see how many DOTP could be replaced by EFAME. The mechanical and thermal properties, processability, heat resistance, and durability of the plasticized systems were measured by tensile testing, DSC, TGA, dynamic mechanical analyzer, and thermal aging oven. It showed that the mixed plasticizer could significantly improve the flexibility, chemical resistance, thermal properties, and processability of PVC products. When the loading of EFAME was 20 parts, the glass transition temperature decreased from 0.32 to -4.63 ℃, and the T10 and T50 were increased. Furthermore, the discoloration time was increased nearly 4 times.