Abstract: Effects of spinning dope concentration and temperature on dynamic viscoelasticity of cellulose diacetate were studied by Physica MCR101 rheoviscometer. The results demonstrated that, at the same angular frequency, when increasing dope concentration or reducing dope temperature, the storage modulus（G/）, loss modulus （G//）,as well as complex viscosity （η*）appeared incremental trends, but the loss tangent decreased. Meanwhile, it was found that when dope concentration was 27.8% or dope temperature was 59℃,with increasing of angular frequency, G/、and G//was upward, but tanδandη* was downward.

Key words: celluose diacetate, dynamic viscoelasticity, storage modulus, loss modulus, loss tangent, complex viscosity