Improvement of the fire behaviour of composite materials for naval application

摘要

This paper review the work performed by Direction des Constructions Navales (DCN) on composite laminates made of glass woven roving and polyester or vinylester halogenated resins with and without halogen synergists. Some of these materials have been aged in water because the applications for these composites could be in external structures of warships. Cone calorimeter tests have been carried out in order to evaluate the flammability of these materials, their thermal degradation properties and smoke produc- tion during combustion. Before ageing, the fire behaviour of the halogenated resin based composites, especially those with halogen synergists, was better than that of standard polyester and vinylester based composites, even those filled with alumina trihydrate, with the exception of the smoke production. The accelerated ageing in salt water at 70"C modifies the fire behaviour of the mate- rials: the maximum heat released by the standard vinylester composite slightly increased. It decreased in the case of the brominated composite. The specific surface of extinction of the brominated composites (with and without synergists) increased at the beginning of the ageing and decreased after.