Influence of CTBN content on fracture toughness of PF particleboard

摘要

The study investigated whether the single-edge-notch bending method could be used in quantitative determinating the fracture toughness of the particleboard.Also,carboxyl-terminated poly(butadiene-co-acrylonitrile)liquid rubber was chosen to improve the fracture toughness of the particleboard.Critical energy release rate G_(IC)and critical stress intensity factor K_(IC)were measured in different directions with sandwich structure and common specimens.The study shows that it is a feasible method to compare the fracture performance of different particleboard by the single-edge-notch bending.The liquid rubber can toughen the particleboard when the addition amount is less than 12% when PF resin was used.More addition can lead to dispersion problem which will decrease the ductibility of particleboard.