双组分油醇酸树脂的合成及表征

Synthesis of alkyd resin by double-component oil and characterization

以豆油、桐油、甘油和邻苯二甲酸酐为原料,LiOH为催化剂,采用醇解法制备醇酸树脂。通过FT-IR和~1HNMR确定了产品的分子结构。结果表明,催化剂质量分数为0.05%、醇解温度为230℃、醇解时间为30 min、酯化温度为170℃、酯化时间为2 h、回流带水剂为10~15 mL时,产品的性能最好;催干剂质量分数为0.4%、引发剂质量分数为2%、固化温度为80℃时,膜性能较好。DSC和TG分析结果表明,醇酸树脂具有良好的热稳定性。

Alkyd resin is prepared through alcoholysis method by using soybean oil,tung oil,glycerol and phthalic anhydride as main materials,Li OH as catalyst.The molecular structure of the resin is determined by FT-IR and^1H-NMR.The results show that the resin has the best performance when the amount of catalyst is 0.05 wt%,the alcoholysis temperature is at 230℃,the alcoholysis time is 30 min,the esterification temperature is at 170℃,the esterification time is 2 h,and the amount of refluxing water agent is 10-15 mL.The film shows a better performance when the amount of the drier is 0.4 wt%,the amount of the initiator is 2 wt%,and the curing temperature is at 80℃.It is known by DSC and TG that the alkyd resin has good thermal stability.