5052鋁合金表面改質對ABS/PC高分子材料附著性之影響

Abstract

嵌入式射出成型可直接將塑料射出至金屬上，且簡化製程、增強組件強度，已被廣泛應用，而近年來已有業界使用模內成型黏著劑來提升結合強度，但由於金屬表面型態不佳，使結合強度未達理想。 本研究使用平行板介電質常壓電漿處理提升鋁合金表面親水性，以增加結合強度。鋁合金試片電漿處理前，先經過化學溶液處理，使表面含有氨基，之後對試片做常壓電漿處理，觀察處理間距、處理次數與電漿媒介氣體對鋁合金試片表面親水性的影響，然後塗上模內成型黏著劑並射出成型，最後再以拉伸試驗探討結合強度與官能基、親水性之間的關聯性。 實驗結果得知，嫁接官能基後可使結合強度提升，並且當鋁合金經過電漿處理後，表面親水性越佳時，結合強度也更高，而施以黏著劑後射出成型的試片經拉伸試驗後，發現鋁合金與塑膠之結合力也較佳。

Insert molding is widely used because it injects plastic to metal directly, simplifies the process, and enhances the bonding strength of Al alloy/polymer. Some applications start to use primer to raise the bonding strength recently, but the condition of the metal surface result in poor bonding strength. In this study the surface of aluminum alloy test pieces were treated by dielectric barrier discharge plasma system to increase adhesive bonding strength. Before plasma treatment, aluminum alloy test pieces surfaces were treated by chemical solution. It was observed that amine functional groups were presented on the surfaces. Then test pieces were treated by plasma, and the effect of the influence of plasma treatment distance, treatment times, and source gas to adhesion strength were compared. After plasma treatment, we glue the primer on the aluminum alloy surfaces, and carry out insert molding. The relation between bonding strength and functional group presented on the aluminum alloy surfaces, adhesion were investigated by shear test. Experiment results showed that polymer linking with amine functional group increase the bonding strength. Plasma treated test pieces showed better adhesion. After shear test, we found that primer enhances the bonding strength of aluminum alloys and polymers.