Metal and plastic parts can be jointed strongly by chemical surface modification of the metal which creates a large number of nano-sized pores on its surface. Strong adhesion between the surface-modified aluminum (Al) alloy part and polyphenylene sulfide (PPS) were obtained easily by insert injection molding. The interface between the Al and the PPS formed by this method was investigated by energy-filtering transmission electron microscopy (EFTEM). High-resolution analysis by elemental mapping and electron energy loss spectroscopy (EELS) was enabled by optimization of the analytical technique for metal/plastic interfaces. Thin cross sections of the Al/PPS interfaces were prepared by ultramicrotomy and by focused ion beam (FIB) fabrication. The ultramicrotomy gave thin and uniformed section swith the thickness of about 70 nm. It has been revealed that PPS is penetrated into the nano-sized pores on the Alsurface, which clarifies the origin of the highbond strength.

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This paper deals with stress analyses of stepped-lapa dhesive joints of similar solid cylinders under static tensile loadings.The effects of Young's modulus ratio between adherends and adhesive,the thickness of adhesive,scarf angle,and the number of steps on the interface stress distributions are examined by FEM calculations and experiments.As a result,it is found that the singular stress at the edge of the interfaces decreases as Young's modulus ratio between the adherends and the adhesive, and the adhesive thickness decrease.The singular stress als odecreases as the scarf angle and the number of steps increase.Using the obtained interface stress distribution,the joint strengths are predicted.For verification of the strengt hprediction,experiments to measure the joint strength are carried out.The numerical results of the joint strength are in a good agreement with the experimental results.

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The carrier-less pressure sensitive adhesive (PSA) sheets sandwiched between two release films are used for laminating process of polarizing plates and glasses of displays. In this paper, the effect of Young's modulus of PSAs on peeling behavior were investigated by peeling test.Release force between the release film and the PSAs were measured under the conditions of various release angles and release speeds. Deformation behavior at peeling front of various peeling angles were observed by a digital microscope. AS the results, the mechanism of release is predicted.

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