48 Inhibiting Pyrolysis Process for Fiber-Reinforced Composites by Using Flame Retardants Additions

In this research, the effect of using inorganic flame retardant which represent zinc borate to increase the flame retardancy for advanced composite material consist of araldite resin (CY223) reinforced by hybrid fibers from carbon and Kevlar fibers as a woven roving (0° – 90°) was studied. Zinc borate has been used as a coating layer of (4mm) thickness.Then, this system was exposed to a direct flame generated from Oxyacetylene torch (3000°C) with different flame exposure distances (10,15,20mm), and study the range of resistance of retardant material layer to the flames and protected the substrate. A hybrid flame retardant was formed by added antimony trioxide with various amount(10%,20%,30%) to zinc borate for improved the flame retardancy, and exposure this hybrid material to same flame temperature and exposure distances. Method of measuring the surface temperature opposite to the flame was used to determined the heat transferred to composite material.