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- W2152454193 abstract "Macromonomers of poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) were synthesized by reacting the monofunctional polymer with 4-vinylbenzoyl chloride. The macromonomer was copolymerized with isoprene, butadiene, styrene, ethyl acrylate, and butyl acrylate. Reactivity ratios of 2,6-dimethylphenyl 4-vinylbenzoate (2) as a model compound were determined with styrene (St) and butyl acrylate (BA). The values obtained are rSt = 0,504, r2 = 1,233, and rBA = 0,123, r2 = 4,070. Polystyrene-graft-PPO is a one-phase system with a Tg between those of the homopolymers. Tg's of the polyacrylate and PPO fractions are not changed by the composition of the polyacrylate-graft-PPO. DSC and dynamic mechanical measurements revealed that the polyacrylate-graft-PPO copolymers are phase-separated if the molecular weight of the PPO macromonomer is high enough. In thermogravimetric analysis the polyacrylate-graft-PPO shows a two-step weight, loss, one due to the polyacrylate at 380–390°C and another due to the PPO at 440–460°C." @default.
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- W2152454193 date "1991-06-01" @default.
- W2152454193 modified "2023-09-23" @default.
- W2152454193 doi "https://doi.org/10.1002/macp.1991.021920614" @default.
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