通过聚乙二醇(PEG)与环氧树脂加成反应制备了聚乙二醇改性环氧树脂(PEGE),分析了反应物摩尔比等因素对PEGE环氧值的影响;采用傅里叶变换红外光谱仪和核磁共振谱仪对PEGE进行了结构表征,并研究了PEGE的热稳定性、水溶性、乳液粒径和表面张力.结果表明,合成PEGE的最佳工艺为PEG的相对分子质量为6000,PEG与环氧树脂的摩尔比为1.6∶1,反应温度为120℃,反应时间为2h,伯胺催化剂的含量为反应物的0.5％(质量分数,下同);合成的PEGE具有良好的热稳定性、水溶性和表面活性,其粒径小、分布均匀,具有良好的应用前景.%Poly (ethylene glycol) (PEG)-modified epoxy resin (PEGE) was synthesized through an addition reaction,and the effect of synthetic parameters on epoxy value of PEGE was evaluated.Chemical structure of PEGE was characterized by Fourier-transform infrared spectroscopy and NMR spectroscopy,and its thermal stability,water solubility,particle size and surface tension were investigated.The results indicated that,for the synthesis of PEGE,the optimum mole ratio of PEG/epoxy resin was set as 1.6/1,the optimum reaction temperature was set to 120 ℃,the optimum reaction time was set as 2 h,and the amount of primary amine catalyst was set as 0.5 wt ％.The PEGE exhibits a good application prospect due to its high thermal stability,good water solubility,high surface activity,small particle size and homogeneous distribution.
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