反应详情

Acrylonitrile (270 g), styrene (630 g), p-isopropenylphenol (100 g), ethyl acetate (250 g) and 2,2'-azobis(2,4-dimethylvaleronitrile (5 g) were fed and polymerized at 60° C. for 4 hours, followed by further adding ethyl acetate (250 g) and 2,2'-azobis(2,4-dimethylvaleronitrile) (5 g) and further polymerization at 60° C. for 4 hours. Solvent was then removed under reduced pressure to obtain a copolymer of isopropenylphenol (hereinafter abbreviated to phenolic polymer B). The viscosity of 5% solution of phenolic polymer B in ethyl acetate, at 25° C., was 1.75 cps.

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3. customSolvent was then removed under reduced pressure