This work has as objective to evaluate the thermo-mechanical behavior of adhesives used in bonded joints of pipes made of glass fiber reinforced plastics (GFRP). These bonded pipes, initially used in desalinization and effluent treatments installations, today are applied in the oil industry, both in oil drilling and production platforms, due to the necessity of lighter and higher corrosion resistance materials. It must be pointed out that in Brazil these pipes are submitted at service temperature of approximately 85ºC, with thermal transient until 115ºC, while other applications of these pipes are designed to work at room temperature. So, the adhesive was evaluated by means of uniaxial tensile tests carried out at temperatures of 25, 55, 85 e 115ºC, and there were determined the yield tension, the rupture tension, the elasticity modulus in the deformation associated to theses tensions. The obtained results show that, with the increase of the temperature, there is a high drop in the yield tension, the rupture tension and the elasticity modulus of the adhesive, while deformation associated to theses tensions significantly increase. It was possible to conclude that the adhesive operates with security until the temperature of 55ºC. Above this temperature the bonded joints produced with this adhesive would be subjected to fails.
Adhesives; GFRP; offshore industry; effect of temperature
