VISCOELASTIC BEHAVIOR OF A SODA-LIME-SILICA GLASS - INADEQUACY OF THEKWW FUNCTION

The viscoelastic behavior of a soda-lime-silica glass has been experim entally investigated in the glass transition range using shear and uni axial creep-recovery experiments. No departure of linearity and thermo rheological simplicity is found in the investigated stress and tempera ture ranges, respectively. The shear and uniaxial viscoelastic constan ts and retardation functions have been precisely measured from the rec overy part. An attempt to model the shear and uniaxial viscoelastic be haviors with KWW functions is made and it is shown that this model can not be a good representation of the linear viscoelastic behavior of th e investigated glass. (C) 1997 Elsevier Science B.V.