Study On The Structural Heterogeneity Of Polybenzoxazine & The Cure Kinetics, Interfacial Properties Of Polybenzoxazine/Carbon Fiber Composites

As one kind of newly developed phenolic thermosetting resin, polybenzoxazines have some excellent merits, such as near-zero shrinkage, no condensation by-products releasing and no strong catalysts needed upon curing. They could be widely used, as alternatives to traditional phenolic resins especially as matrices for high-property resin based composites. Fully understanding the relationship between monomer- network structure-properties of thermosetting resin is important for taking advantage of them. Nowadays the network structure of polybenzoxazines has been rarely reported. The Author of this paper think that the network formation of polybenzoxazine not only be influenced by hydrogen bond between intermoleculars or intramoleculars, but also by multifunction participating in cure reaction and the reaction molecular diffusion controlled. Therefore, the cure kinetics and the network formation were studied based on changing the average functionality by blending. bisphenol and phenol based benzoxazine. Then the network structure of polybenzoxazines and its effect on material properties were studied.