Abstract
The miscibility of poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) with styrene-methyl methacrylate (S-MMA) copolymers was studied by differential scanning calorimetry. An S-MMA copolymer with a low MMA content is miscible with PPO when the PPO content in the blend is 40% or more. An increase in the MMA content in an S-MMA copolymer narrows the composition range in which the blend is miscible. An S-MMA copolymer containing 29.2 wt.% MMA is immiscible with PPO over the entire composition range.
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