Dissimilar Materials Bonding Using Epoxy Monolith
Dissimilar Materials Bonding Using Epoxy Monolith
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DOI：
10.1021/acsomega.8b00920
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发表时间：
2018-07
期刊：
影响因子：
4.1
通讯作者：
Yuka Sugimoto;Y. Nishimura;Fai Uehara;A. Matsumoto
中科院分区：
文献类型：
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作者：
Yuka Sugimoto;Y. Nishimura;Fai Uehara;A. Matsumoto
以2，2-二(4-缩水甘油氧基苯基)丙烷和4，4‘-亚甲基双(环己胺)为原料，聚乙二醇为致孔剂，采用聚合诱导相分离法制备了具有高孔道结构的环氧体。在这项研究中，我们展示了一种新型的不同材料的粘接方法，用于各种聚合物和涂覆了环氧片层的金属。根据扫描电子显微镜的观察，根据环氧树脂和交联剂的比例，环氧片层的孔径和数目分别为1.1-114mm2和8.7mm2-48200μ-2。将聚乙烯、聚丙烯、聚甲醛、丙烯腈-丁二烯-苯乙烯共聚物、聚碳酸酯双酚A和聚对苯二甲酸乙二酯等各种热塑性塑料通过热焊的方法粘接在整体改性金属板上。不锈钢和铜板与热塑性塑料的单层搭接剪切拉伸强度在1.2~7.5 Mpa之间，大于未经整体改性的两种粘接系统的粘结强度。断裂试件的扫描电子显微镜观察直接证实了对该粘结系统的锚定作用。观察到填充在环氧树脂整体孔洞中的塑料的拉长变形。结果表明，粘接强度显著依赖于所用热塑性塑料的固有强度。通过添加粘合剂、溶剂和反应性单体，实现了硬塑料(如聚苯乙烯和聚甲基丙烯酸甲酯)的环氧整体式粘接。成功地制备了环氧片材，并将其应用于异种材料的粘接。
The epoxy monolith with a highly porous structure is fabricated by the thermal curing of 2,2-bis(4-glycidyloxyphenyl)propane and 4,4′-methylenebis(cyclohexylamine) in the presence of poly(ethylene glycol) as the porogen via polymerization-induced phase separation. In this study, we demonstrated a new type of dissimilar material bonding method for various polymers and metals coated with the epoxy monolith. On the basis of scanning electron microscopy (SEM) observations, the pore size and number of epoxy monoliths were evaluated to be 1.1–114 μm and 8.7–48 200 mm–2, respectively, depending on the ratio of the epoxy resin and cross-linking agent used for the monolith fabrication. Various kinds of thermoplastics, such as polyethylene, polypropylene, polyoxymethylene, acrylonitrile–butadiene–styrene copolymer, polycarbonate bisphenol-A, and poly(ethylene terephthalate), were bonded to the monolith-modified metal plates by thermal welding. The bond strength for the single lap-shear tensile test of stainless steel and copper plates with the thermoplastics was in the range of 1.2–7.5 MPa, which was greater than the bond strength value for each bonding system without monolith modification. The SEM observation of fractured test pieces directly confirmed an anchor effect on this bonding system. The elongated deformation of the plastics that filled in the pores of the epoxy monolith, was observed. It was concluded that the bond strength significantly depended on the intrinsic strength of the used thermoplastics. The epoxy monolith bonding of hard plastics, such as polystyrene and poly(methyl methacrylate), was performed by the additional use of adhesives, solvents, and a reactive monomer. The epoxy monolith sheets were also successfully fabricated and applied to dissimilar material bonding.