Characterization
Dynamic moduli and complex viscosity as a function of frequency were determined in a Rheometrics Mechanical Spectrometer (RMS 800) in a parallel plate mode at 280°C under nitrogen. Unprocessed and melt processed samples were predried to less than 100 ppm moisture and molded into 25.4 mm (diameter) by 1.5 mm (thick) disks that were used for measurements.Thermal properties of selected samples were measured by differential scanning calorimetry (Perkin-Elmer DSC-7) during the first heating and first cooling
scans at a rate of 20°C/min. IR spectra of selected compositions were obtained on compression molded films (Perkin-Elmer, Paragon 1001).Intrinsic viscosity (IV) was measured in phenol/tetrachloroethane 60/40 w/w solvent at a polymer concentration of 1%. The intrinsic viscosity of each sample was calculated by using the Solomon-Ciuta
(39) equation of a single point measuremen