VISCOELASTIC BEHAVIOR AND RELAXATION IN POLYCARBONATE POLYBUTYLENETEREPHTALATE BLENDS

Viscoelastic behavior and relaxation spectra of polycarbonate/polybuty leneterephtalate blends were studied with a torsional pendulum in the temperature range from -180-degrees-C to +250-degrees-C. Polycarbonate and polybutyleneterephtalate blends are incompatible in this temperat ure range. An abnormal dependence of dynamic shear modulus on the cont ent of the components was found at temperatures close to the glass tra nsition temperatures of PC and PBT. This effect was explained by an in teraction between the components. A problem of the interaction between the components is discussed and a method for the quantitative descrip tion of this interaction is suggested.