Specific interactions in partially miscible polycarbonate (PC)/poly (methyl methacrylate) (PMMA) blends

Blends of bisphenol A polycarbonate and poly(methyl methacrylate) have been prepared by solution casting technique using tetrahydrofuran as a solvent. These blends are characterized using DSC, TGA, FT-IR and powder X-ray diffraction techniques. The differential scanning calorimetric and XRD results reveal large crystallinity in the solution cast PC and PC/PMMA blends which decreases with increasing PMMA content. Coherently scattering domain size, on the other hand, increases with increasing PMMA content. Our XRD results reveal that the strongest peak of PC shifts to lower 2θ angles in the PC/PMMA blends indicating the presence of specific interactions between the PC and PMMA phases.