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以α-甲氧基-ω-N-异丙醇基-对苯甲胺基聚乙二醇和酚醛环氧树脂F51为原料合成了非离子型活性乳化剂(PEGF51),并与F51混合,通过相反转法制备了分散相粒径为纳米级的PEGF51/F51水乳液.通过红外光谱和凝胶渗透色谱(GPC)分析了PEGF51的结构,研究了PEGF51浓度对PEGF51/F51水乳液分散相粒子粒径和D230-PEGF51/F51固化产物的力学性能、断面形貌和耐水性能的影响规律.结果表明:在环氧树脂分子结构中引入化学连接的PEG链段有利于提高环氧树脂链段的亲水性和应变松弛速率.增加PEGF51浓度,制备的PEGF51/F51水乳液分散相粒子粒径减小,粒度分布变窄;D230-PEGF51/F51固化产物的玻璃化转变温度和室温下的刚度和拉伸强度降低,冲击强度、断裂应变和吸水率增加.PEGF51与F51物质的量的比为1∶3时可制备出同时具有优异的拉伸强度、模量、断裂应变、冲击性能和低吸水率的D230-PEGF51/F51环氧树脂.
A non-ionic active emulsifier (PEGF51) was synthesized from α-methoxy-ω-N-isopropanol-p-aminobenzylaminopolyethylene glycol and phenolic epoxy resin F51. Phase inversion method was used to prepare PEGF51 / F51 aqueous emulsion with nanometer-size disperse phase.The structure of PEGF51 was analyzed by infrared spectroscopy and gel permeation chromatography (GPC), and the effect of PEGF51 concentration on the dispersion of PEGF51 / F51 aqueous dispersions Diameter and D230-PEGF51 / F51 mechanical properties, cross-sectional morphology and water resistance of the results show that: the introduction of chemically bonded PEG segments in the molecular structure of epoxy resin is conducive to improving the affinity of the epoxy resin segment Aqueous and strain relaxation rate.With the increase of PEGF51concentration, the particle size of dispersed phase of PEGF51 / F51 aqueous emulsion decreased and the particle size distribution became narrower.The glass transition temperature and the stiffness at room temperature of D230-PEGF51 / F51 The tensile strength, the strain at break and the water absorption rate increase.PEGF51 and F51 mass ratio of 1: 3 can be prepared at the same time with excellent tensile strength, modulus, fracture strain, impact properties and low water absorption D230-PEGF51 / F51 epoxy resin .