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利用红外光谱确认了环氧树脂(EP)与端羧基丁腈橡胶(CTBN)的预聚反应机理是-COOH与环氧基进行酯化反应生成-OH基团,其最佳反应条件是70℃、3 h。在该预聚物中加入固化剂、促进剂及其他助剂,可制备出一种糊状EP结构胶;将该结构胶用于不锈钢的粘接时,其室温粘接强度为57 MPa,100℃剪切强度为34.5 MPa,150℃剪切强度为12 MPa,室温90°剥离强度为17 N/mm;该结构胶具有良好的耐环境老化性能,可以在-40～150℃范围内使用。
The mechanism of prepolymerization of epoxy resin (EP) and carboxyl-terminated acrylonitrile-butadiene rubber (CTBN) was confirmed by FT-IR spectroscopy. The optimal reaction conditions of -COOH and epoxy group were -OH group. The optimum reaction conditions were 70 ℃ , 3 h. In the prepolymer by adding curing agent, accelerator and other additives, can be prepared a paste EP structural adhesive; the structural adhesive for stainless steel bonding, the room temperature bonding strength of 57 MPa, 100 The shear strength is 34.5 MPa, the shear strength at 150 ° C is 12 MPa and the peel strength at room temperature is 17 N / mm. The structural adhesive has good environmental aging resistance and can be used within the range of -40 to 150 ° C.