环保增塑剂环己烷1,2二甲酸二异辛酯的合成与应用

以环己烷1,2二甲酸酐(HHPA)与异辛醇为原料，甲烷磺酸为催化剂，合成了环保增塑剂环己烷1,2二甲酸二异辛酯（DEHCH），并与邻苯二甲酸二异辛酯（DEHP）的增塑性能进行了对比。经单因素实验得到最佳的合成工艺条件为：醇酐摩尔比为2.6∶1.0，催化剂用量为酸酐质量的0.25 %，反应温度为170 ℃，反应时间2 h，酯化率可达到97.89 %。并用红外光谱、核磁共振、质谱表征了产物的分子结构，通过力学性能的对比可知，合成的DEHCH与DEHP有着相似的增塑性能，可以作为一种替代邻苯二甲酸酯类的增塑剂。

Synthesis and Application of Environmentally Friendly Plasticizers Di(2 ethylhexyl) 1,2 cyclohexane Dicarboxylate

In this article di(2 ethylhexyl) 1,2 cyclohexane dicarboxylate (DEHCH) was synthesized by the reaction of hexahydrophthalic anhydride (HHPA) with iso octanol using methanesulfonic acid as a catalyst. The optimal reaction scheme was as follows: n(iso octanol)∶n(HHPA) was 2.6∶1.0, catalyst amount was 0.25 % of the mass of HHPA, reaction temperature was 170 ℃, and reaction time was 2 h. The esterification yield was 97.89 %. In addition, the molecular structure of DEHCH was characterized by IR, 1HNMR, and MS. And the mechanical properties of PVC plasticized by DEHCH were similar to those of PVC plasticized by DEHP. The synthesized DEHCH could be used as an alternative for phthalates.