Effect of the Surface Preparation on PP Reinforced Glass Fiber Adhesive Lap Joints Strength

This article is concerned with the influence of surface treatment on the strength of single lap joints. The tensile tests were carried out in order to find the surface treatments which maximize joint strength using polypropylene reinforced glass fiber as adherents. The maximum shear strength was obtained with the trichlorethylene plus primer treatment when using a cyanoacrylate adhesive. The pretreatment effectiveness was evaluated in terms of environmental durability and an important decrease in static strength of adhesive joints occurred when they were immersed in water.