Influence of Composition on the Linear Viscoelastic Behavior and Morphology Properties of Polycarbonate (PC)/Acrylonitrile- Butadiene-Styrene (ABS) Blends

The morphologies and viscoelastic properties of the phase-separated Polycarbonate (PC)/Acrylonitrile-Butadiene-Styrene (ABS) blends have been investigated using Scanning Electron Microscopy (SEM) and oscillation rheometry. Various rheological criteria based on the viscoelastic properties of the blends have been used to evaluate the phase inversion. The behaviorof complex viscosity (η*) at low frequencies as the temperature, T, approaches phase separation isdue to the critical concentration fluctuations in the one-phase region. The temperature at maximum slope of the η* vs. T dependence at low frequencies leads to the identification of the binodal temperature, whereas a plot of [(G'')2/(G'T)]2/3 vs. 1/T gives the spinodal temperature.

Keywords:

PC , ABS blend , Phase inversion , Co-continuous , Viscoelastic properties , morphology