Dynamic viscoelasticity of cellulose diacetate fiber spinning solution

The wood pulp after pretreatment,acetification and hydrolysis was dissolved into acetone solvent,hence cellulose diacetate(CDA) fiber spinning solutions with different mass concentrations were prepared.Dynamic viscoelasticity of CDA fiber spinning solution was studied by dynamic scanning tests with Physica MCR101 rheoviscometer.The results demonstrated that when angular frequency was kept constant,with increasing of solution mass concentration or decreasing of solution temperature,the storage modulus(G′),loss modulus(G″),as well as complex viscosity(η*)appeared incremental trends,but the loss tangent reduced;and when dope mass concentration or dope temperature was fixed,increasing the angular frequency increased G′ and G″ accordingly,but tan δ and η* went downward.