The effect of different nanoparticles and open time on bonding strength of poly (vinyl acetate) adhesive

Nanotechnology is one of the major technologies through in this century. Nano particles are an important part of this technology. Properties of many traditional materials can be changed by using the nanoparticles. Open time is one of key processing parameters for adhesive applications. Many adhesion failures are caused by exceeding of the open time. The main objective of this study is to improve the adhesion performance of PVAc adhesive by increasing open time through application of nanoparticles, specifically silicium dioxide (SiO2) and titanium dioxide (TiO2). For this reason, nano SiO2 and nano TiO2 were blended with PVAc at the open time 0, 5, 10 and 15 min. Effect of the nanoparticles and open time was determined by lap shear joint strength tests. Tests were carried out according to DIN EN 302-1. The results indicate that nanoparticles can considerably improve the bonding strength of PVAc at open-time of 5 and 10 min.