Water interactions in Al/PET

Abstract

Two cases of water interaction witb virgin PET and with metallized (Al) PET were studied using thermal desorp tion spectroscopy (TDS) and dynamic secondary ion mass speetrometry (SIMS), respectively. On the one hand, the TDS approach tends to show that the water is weakly bound to the polyester (-10 kcal mol-I); on the other hand, the SIMS study performed on metallized PET shows an enhancement of the water concentration around the interface. These results are discussed in order to elucidate tbe presence of such moisture and its influence on the metal/polymer adbesion and corrosion.