本研究では,シランカップリング剤(Silane Coupling Agent: SCA)処理によって表面改質を施したアルミニウム合金とエポキシ系接着剤の接着強度の発現機構を調べた。アルミニウム合金の表面改質には,2種類のシランカップリング剤(N-2-(aminoethyl)-3-aminopropylmethyldimethoxysilaneおよびN-2-(aminoethyl)-3-aminopropyltrimethoxysilane)を使用し,その後,被着材表面にエポキシ系接着剤を塗布した接着接合体を用意した。そして,レーザー衝撃試験(Laser Shock-wave Adhesion Test: LaSAT)を用いて接着面の破壊試験を行い,2 種類の表面処理および未処理材の接着強度差を調べた。その強度差のメカニズムを解明するために分子動力学(Molecular Dynamics: MD)法を用いて実験と同様の接着界面モデルを作成し,一軸引張解析を行った。その結果から,SCA 処理の相違と接着強度の関係を検討した。
Adhesion without any mechanical damages by punching or drilling process is a key technology in industrial manufacturing fields. For the construction of reliable and robust adhesion system, the evaluation and control of the structure and physical properties of the adhesion interphase are significant. Recently, various analyses methods of the adhesion interphase have been developed and the adhesion interphase and the interphase possesses three dimensional structure, not two dimensional. In this review, the adhesion interphase through analyses using confocal Raman microspectroscopy. The interphase thickness is controlled by the morphology of adhered substrates. In the case of crystalline polymer-based substrates, crystallinity of the substrates decides the interphase thickness. The interphase thickness has large correlation with the adhesion strength. This trend is observed in the specimens with isotactic polypropylene or polyamide 66 substrates. In the adhesion system using thermal melting as well as that using reactive curing adhesives, the interphase thickness is controlled. The adhesion specimen of amorphous epoxy substrates and adhesives also possesses interphase structure, which is formed by two different mechanism and is largely received by thermal effect. These results mean that the fine control of the structure of adherents and adhesives develop adhesion manufacturing.