The Study Of Phenol Resin Modification And The Carbon Fiber Composites

In this paper, phenol resin was modified by cashew shell oil and melamine respectively, the curing performance and thermal stability were investigated. The modified phenol resin was acted as matrix and carbon fiber as the reinforced material, by means of the hot-pressing technology to prepare the composite materail. The test of mechanical properties and friction properties were used to study the influence of phenol resin modification to those carbon fibre composite materail. The results show that the introduction of the cashew shell oil will introduce a flexible chain to resin structure. Through the DSC non-isothermal test and kinitic analysis, the introduction of cashew shell oil have a hinder effect on curing process. This hinder effect will have an influence to the mechanical properties and friction properties of carbon fiber composite materail. With the conten of cashew shell oil increasing, the impact strength will be increased, but the curing extent will be reduced. With the conten continuously increasing, the impact strength will not be increased, this could indicate that the introduction of cashew shell oil could increase the toughness of materail, but the excessive cashew shell oil will reduce the curing extent of materail, on the contrary, the impact strength will be damaged. In addition, the introduction of cashew oil will make the friction coefficient rised and the stability of friction coefficient enhanced. Throurgh the study of thermal stability and thermal pyrolysis, the results show that the introduction of heteroaromatic rings could improve the thermal decomposition temperature and char yield. It founded that the thermal stability and char yield were improved with the melamine content in Poly(melamine-co-phenolic resin) copolymer increased. It could be found that the thermal stability of resin matrix would have a maor influence on the composite materail stability of friction coefficient and wear rate, those will be improved with the thermal stability of resin matrix increasing.