Compatibility of some fluorosubstituted styrene polymers and copolymers in blends with poly(2,6-dimethyl-1,4-phenylene oxide) and with polystyrene

Blends of poly(p-fluorostyrene) (PpFS), poly(o-fluorostyrene) (PoFS), poly(styrene-co-p-fluorostyrene) (SP46), poly(styrene-co-o-fluorostyrene) (SO49), with poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) and with polystyrene (PS), have been prepared by compression molding of coprecipitated polymers. Compatibility of these systems has been studied by differential scanning calorimetry. Detection of one or two glass transition regions was used to classify the blends as compatible or incompatible. Homopolymers of pFS and oFS were found to be incompatible with PPO and PS. The SP46 copolymer and SO49 copolymer were compatible with PPO in all proportions.