MECHANICAL PROPERTIES OF CARBONIZED MEDIUM DENSITY FIBERBOARD/POLYMER COMPOSITES

摘要

Carbonized medium density fiberboard (CMDF)/polymer composites were produced by impregnating the porous preforms with epoxy resin and phenolic resin. Samples infused with the epoxy resin had higher apparent density than those infused with the phenolic resin, because the former displayed a greater weight gain and less porosity than the latter. The mechanical properties of these composites were characterized by conducting four-point bending tests, dog-bone tensile tests, and single-edge-notch bending fracture toughness tests according to ASTM standards. The results showed that the epoxy resin was more favorable in improving the mechanical properties of the CMDF. It was demonstrated that the specific strength was increased considerably after resin infusion; while the specific modulus was not changed much. The results indicated that the increased specific strength was due to the improved resistance to fracture of the material.