STUDY OF THE MISCIBILITY AND THE PHASE-BEHAVIOR OF AMORPHOUS BINARY BLENDS OF POLY(HYDROXY ETHER OF BISPHENOL-A) AND POLY(STYRENE-CO-ACRYLONITRILE)

The phase behaviour of the binary polymer system consisting of poly(hy droxy ether of bisphenol A) (Phenoxy) and poly(styrene-co-acrylonitril e) (SAN) has been investigated by means of visual observations, light transmission measurements, differential scanning calorimetry and dynam ic mechanical thermal analysis. The influence of both the blend compos ition and the copolymer composition of SAN on the miscibility of these binary blends was examined. All of the Phenoxy/SANx (x=5, 10.4, 15, 1 6.9, 29, and 34 wt% AN) blends studied were partially miscible. The co mposition of the two phases and the interaction parameters were calcul ated from measurements based on the glass transition temperatures.