Abstract
A new chemical decomposition technique of polymer using mixed acid formed between nitric and hydrobromic acid was proposed. This unique technique has the features that the decomposition rate is faster than the hot nitric acid and fibers keep the original solid shape. Fundamental data of strength degradation for recycled fiber reinforced plastic (FRP) composite were investigated in order to develop a recycling method. The strength degradation by mixed acid of two kinds of monofilament, i.e. a carbon and a glass fiber, was investigated. Further, the mechanical properties of FRP with recycled fiber were compared with FRP made from virgin fiber. It is understood that this new method has the potential to recycle the discarded FRP composite.
