10309 分子シミュレーションによる樹脂/金属界面の剥離強度解析(計算機シミュレーションとその応用(2),OS.14 計算機シミュレーションとその応用)

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We study the relationship between lattice mismatch and adhesion strength of interfaces between organic materials and metals by using molecular dynamics. Aromatic resins with benzene-ring connected structures are used as examples of organic materials. We define a lattice constant of the aromatic resins as the distance between the second nearest neighbors of a benzene ring. The value of the lattice constant of a wholly aromatic polyester resin is about 0.24 nm. On the other hand, a lattice constant of face-centered-cubic structured metals is defined as the distance between the nearest neighbors. The values of copper and silver are about 0.255 nm and 0.29 nm, respectively. The adhesion of aromatic polyester resin with copper is stronger than that with silver because the lattice mismatch of the resin with copper is smaller than that with silver. Reducing the lattice mismatch is found to be effective in strengthening the adhesion.
2009-03-05