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首先将聚醚多元醇和甲基丙烯酸甲酯(MMA)进行酯交换反应,然后利用多元胺与烯双键的加成反应原理,将多乙烯多胺与甲基丙烯酸酯进行反应,合成了含甲基丙烯酸聚醚多元醇酯柔性基团的新型环氧树脂室温固化剂。通过FT-IR等方法对产物结构进行表征,探讨并优化了各种反应条件,最后考察了该柔性固化剂对环氧树脂性能的影响。研究结果表明,柔性固化剂合成反应的优化条件是n(聚醚多元醇)∶n(MMA)为1∶5,n(催化剂)∶n(聚醚多元醇+MMA)为2∶100,n(聚醚多元醇酯)∶n(多乙烯多胺)为1∶2.0,反应时间为8h;在此条件下所得固化剂的产率和收率分别为96.3%和96.38%;改性固化剂/环氧树脂体系的凝胶时间仅为29min,拉伸剪切强度达到30MPa。
First, the polyether polyol and methyl methacrylate (MMA) were subjected to transesterification reaction, and then the polyamine and the methacrylate were reacted by the addition reaction of the polyamine and the olefinic double bond to synthesize methyl A Novel Epoxy Resin Room Temperature Curing Agent for Poly (Acrylic Acid) Polyether Polyol Ester Flexible Groups. The structure of the product was characterized by FT-IR and other reaction conditions were discussed and optimized. Finally, the influence of the flexible curing agent on the properties of the epoxy resin was investigated. The results show that the optimal conditions for the synthesis of flexible curing agent are: n (polyetherpolyol): n (MMA) = 1: 5, n (Polyether polyol ester): n (polyethylene polyamine) is 1: 2.0, the reaction time is 8h; under the conditions, the yield and yield of the obtained curing agent are 96.3% and 96.38% / Epoxy resin system, the gel time is only 29min, tensile shear strength of 30MPa.