Method and device for evaluating processability of viscoelastic material

摘要

A method and a device evaluate a processability of a viscoelastic material. A measuring step and means measure a complex viscosity modulus eta * and two complex elasticity moduli G*1, G*2 in respective two shear ranges with different shear speeds, by the following: varying a vibration frequency and a vibration amplitude at a given temperature range, and controlling a shear stress applied to the viscoelastic material which is mixed under a given mixing condition. The shear stress causes a reactive stress. The complex viscosity modulus eta * and the two complex elasticity moduli G*1, G*2 are measured based on the reactive stress. A first operation operates an apparent activation energy Ea by the following: <DF> eta * = A.exp (Ea/RT) </DF> where   T is temperature,   R is gas constant,    eta * is complex viscosity modulus. <??>A second operation operates a complex elasticity modulus change ratio G*r, a ratio between the two complex elasticity moduli G*1, G*2. <IMAGE>