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以EP(环氧树脂)、DADGEBA(烯丙基双酚A型EP)和多官能度的DADGEBAES(烯丙基双酚A型环硫/EP)分别作为基体树脂,以T-33作为固化剂,制备了相应的胶粘剂。探讨了不同胶粘剂的凝胶时间、胶膜硬度、对不同基材的高低温剪切强度和接触角等性能,并采用计算机软件模拟法计算出胶粘剂/Al基材表面的相互作用能。结果表明:DADGEBAES胶粘剂可低温快速固化,并且其低温(12℃)初始粘接性能优于DADGEBA胶粘剂,但固化完全后的粘接性能劣于DADGEBA胶粘剂;由DADGEBAES胶粘剂和DADGEBA胶粘剂制成的钢/钢胶接件,其剪切强度高于Al/Al胶接件,并且低温时两者对Al基材的表面浸润性俱佳(接触角均小于90°),DADGEBAES胶粘剂/Al基材的接触角更小、相互作用能更低且热稳定性更好。
Epoxy resin, DADGEBA (allyl bisphenol A type EP) and multifunctional DADGEBAES (allyl bisphenol A cyclic sulfur / EP) were used as the matrix resin and T-33 as the curing agent , Prepared the corresponding adhesive. The gel time, film hardness, high and low temperature shear strength and contact angle of different substrates were discussed. The interaction energy of the surface of the adhesive / Al substrate was calculated by computer software simulation. The results show that: DADGEBAES adhesive can be rapidly cured at low temperature, and its initial bonding performance at low temperature (12 ℃) is better than that of DADGEBA adhesive, but the adhesive property after curing is worse than that of DADGEBA adhesive; Shear strength of the steel adhesive is higher than that of the Al / Al adhesive, and the surface wettability of the Al base is good both at low temperatures (the contact angle is less than 90 °), the contact of the DADGEBAES adhesive / Al substrate Smaller angles, lower interaction and better thermal stability.