The rheological properties of aqueous suspension of curdlan (ASC) with different molecular weights were investigated with dynamic viscoelastic experiments．Solid-like behavior for ASC was observed at room temperature.The storage shear modulus G′ demonstrated a slight frequency dependence over the range measured

whereas the loss shear modulus G″ and loss tangent δ showed a shallow minimum．The viscoelasticity of ASC increased with increasing molecular weight and concentration of curdlan．The flow curves were approximated by the Herschel-Bulkley rheological model．The fact that ASC manifests an elastic behavior is attributed to the formation of percolating network established by the aggregation or flocculation of curdlan particles

which can be described by the scalar elasticity model of percolation theory．The shear modulus G′ showed a scaling relationship with the curdlan concentration in excess of a threshold concentration cs=0.3％

G′=Goεt

where the scaling exponent t=2.54．