Effect of copolymer composition on the miscibility of poly(styrene-co-acetoxystyrene) with phenolic resin

The miscibility behavior and specific interaction of phenolic/polystyrene-c o-acetoxystyrene, (PS-co-PAS) blends by varying acetoxystyrene contents of the PS-co-PAS copolymer were investigated by differential scanning calorime try (DSC) and Fourier transform infrared spectroscopy (FT-IR). A miscibilit y window was found when the acetoxystyrene fraction in the copolymer is hig her than 45 mol% in phenolic/PS-co-PAS = 50/50 blend system. Painter-Colema n Association Model (PCAM) is able to predict the miscibility window at 150 degreesC compared with our experimental results based on DSC analyses. (C) 2001 Elsevier Science Ltd. All rights reserved.