The phase behavior of blends of styrene/maleic anhydride copolymers (SMA) with styrene/methyl methacrylate copolymers (SMMA), styrene/acrylonitrile copolymers (SAN), tetramethyl bisphenol‐A polycarbonate (TMPC), and poly(2,6‐dimethyl‐1,4‐phenylene oxide) (PPO) have been determined. Tentative binary interaction energies were evaluated from mapping the copolymer composition miscibility boundaries using the Flory–Huggins theory combined with the binary interaction model. Data on phase‐separation temperatures were too sparse for these systems to obtain refined estimates using the Sanchez–Lacombe theory. A negative interaction energy was obtained for the MA/AN pair; however, the MA unit showed strong repulsive interactions with all other monomer units examined here.
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Gan et al. (1994) studied this question.
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