白花树果油环氧脂肪酸甲酯增塑剂的制备及其应用

Preparation and application of epoxy Styrax tonkinensis oil fatty acid methyl ester plasticizer

以白花树果油为原料,磷钨杂多酸季铵盐为催化剂,制备了白花树果油环氧脂肪酸甲酯增塑剂。通过FT-IR对催化剂进行表征,结果表明催化剂具有Keggin型结构。通过正交实验探索了白花树果油甲酯环氧化的最优工艺条件:脂肪酸甲酯为10 g,催化剂质量分数为2%,双氧水质量分数为25%(均基于甲酯质量),反应温度为65℃,反应时间为0.5 h,溶剂乙酸乙酯用量为20 mL时,产物环氧值可达5.30%。在增塑剂质量为环氧树脂质量的10%时,对比了白花树果油EFAME、DOP、DOTP对环氧树脂128/934固化体系的增塑性能,实验结果表明,EFAME可有效改善环氧树脂固化体系的柔韧性,增塑性能优于石化增塑剂DOP、DOTP,可望成为邻苯二甲酸酯类增塑剂的绿色替代品。

The epoxy Styrax tonkinensis oil fatty acid methyl ester plasticizer is prepared from Styrax tonkinensis seed-oil with heteropolyacid quaternary ammonium salt as catalyst.The catalyst structures are characterized by FT-IR.The result shows that the catalyst possesses a Keggin type structure.The optimal reaction conditions are obtained and shown as follows：10 g of Styrax tonkinensis oil methyl ester,2 ％ of catalyst,25 ％ of H2 O2 （based on the methyl esters）,65℃ of reaction temperature,0.5 hour of reaction time and 20 mL of solvent.The epoxy value of epoxy methyl esters can reach about 5.30％.The plasticizing performance of Styrax tonkinensis oil EFAME is compared with that of DOP and DOTP,and the results indicate that Styrax tonkinensis oil EFAME is an outstanding plasticizer for epoxy resin curing system.