Abstract
Radical polymerization of styrene (St) with p-methoxystyrene (MSt) and p-t-butoxystyrene (BSt) was performed in the presence of 4-methoxy-2,2,6,6-tetramethylpiperidine-1-oxyl (MTEMPO), giving random copolymers with molecular weights controlled and with monomer unit ratios desired. The polymerization proceeded in accordance with a living mechanism, because molecular weight was in proportion to reciprocal of initial concentration of MTEMPO, and increased with conversion. Poly(St-ran-MSt) efficiently initiated the copolymerization of styrene with BSt, giving a block copolymer comprising poly(St-ran-MSt) and poly(St-ran-BSt), and vice versa. The t-butoxy groups of BSt units were selectively hydrolyzed to hydroxy groups, with formation of a random block copolymer including vinyl phenol units.
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Yoshida, E., Takiguchi, Y. Synthesis of a Random Block Copolymer Comprising Poly(styrene-ran-p-methoxystyrene) and Poly(styrene-ran-p-t-butoxystyrene) by 2,2,6,6-Tetramethylpiperidine-1-oxyl-mediated Living Radical Polymerization. Polym J 31, 429–434 (1999). https://doi.org/10.1295/polymj.31.429
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DOI: https://doi.org/10.1295/polymj.31.429