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Mechanical properties and water resistance of the particleboards bonded by the tannin–sucrose–sulfuric acid adhesive (pH 1.0) and the tannin–sucrose adhesive (pH 4.8) at 180 °C for 10 min. (a) Bending properties; (b) internal bond (IB) strength properties; and (c) thickness swelling (TS) properties. MOR—modulus of rupture.
