Polyurethane (PU) composite foams were prepared by pour method with soy-based polyol (soyol). Foams
were tested for the evaluation of mechanical properties and cell morphologies as a portion of wood fiber
present. Thermal behaviors as well as foam morphology were investigated. Scanning electron microscopy
results exhibited that PU composite foam had improved cell size due to the presence of wood fiber. Thermal
gravimetric analysis and differential scanning calorimetry results clearly showed the most substantial
increase of the glass transition temperature (Tg) and decrease of the decomposition temperature (Td) in
the fiber reinforced PU foam. PU composite foam had no influence on compressive strength; however,
it had caused slight reduction in tensile strength. PU composite foam displayed a broad distribution of
inter-domain spacing associating with morphological changes