METHOD AND DEVICE FOR EVALUATING PROCESSABILITY OF VISCOELASTIC MATERIAL, METHOD FOR SETTING CONDITION FOR PROCESSING VISCOELASTIC MATERIAL, AND DEVICE FOR PROCESSING VISCOELASTIC MATERIAL; AND METHOD FOR CONTROLLING PROCESSING OPERATION OF VISCOELASTIC MATERIAL
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United States of America Patent
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Apr 12, 2005
Grant Date -
Jul 29, 2004
app pub date -
Aug 15, 2003
filing date -
Aug 19, 2002
priority date (Note) -
Expired
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Abstract
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: .eta.*=A.multidot.exp(Ea/RT) 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.
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