Urethane type adhesive mixtures containing poly(MDI) were used to prepare b
iodegradable methane type composites containing wheat stalks. According to
the mechanical properties, i.e., tensile strength, bending strength, and ha
rdness of the composites, the ratio of wheat stalks to sticking mixtures, t
he technological pressure used, and the size of the wheat stalks were optim
ized. The mechanism of the possible chemical reaction is also discussed.