Study on Outgassing Characteristics of Epoxy Glass Fiber Reinforced Plastic at Different Temperatures

To explore the outgassing characteristics of epoxy glass fiber reinforced plastic(GFRP) at different temperatures, a mathematical model of the outgassing rate of epoxy GFRP corresponding to pumping time was established, which was based on a diffusion degassing model. The empirical parameters of this model are obtained by experimental data fitting. Meantime, the outgassing rate of epoxy GFRP at different temperatures was investigated by using the static pressurizing method. The results show that the outgassing rate of the epoxy GERP material gradually decreases with pumping time under a constant temperature. As the temperature increases, the outgassing rate of epoxy GFRP increases and presents an exponential decay law with pumping time. In addition, the outgassing components from the epoxy GFRP material were analyzed using a quadrupole mass spectrometer. The main gas component is H₂O, which also contains a small amount of H₂、CO、N₂ and O₂. The proportions of gas components discharged from GFRP materials are not varied with the increase of temperature, indicating that the temperature has no significant effect on the gas components distribution.