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- W2066325087 abstract "The anionic polymerization behaviors of ethynylstyrene derivatives containing isomeric pyridine moieties, 2-(2-(4-vinylphenyl)ethynyl)pyridine (A), 3-(2-(4-vinylphenyl)ethynyl)pyridine (B), and 4-(2-(4-vinylphenyl)ethynyl)pyridine (C), were investigated in the identical conditions. The anionic polymerization of A–C was performed with (diphenylmethyl)potassium (Ph2CHK) in tetrahydrofuran (THF) at −78 °C. The polymerization of A proceeded quantitatively at –78 °C for 4 h, and the resulting poly(A) possessed predictable molecular weights (Mn = 3300–68,500) and narrow molecular weight distributions (MWDs) (Mw/Mn = 1.04–1.11). In contrast, the anionic polymerization of B was not performed at –78 °C for 4 h due to the occurrence of side reactions. The monomer B was quantitatively recovered after the reaction. In the polymerization of C performed at –78 °C for 6 h, observed Mn values of the resulting poly(C) were in good agreement with calculated molecular weights based on monomer to initiator ratios, but the MWDs were somewhat broad (Mw/Mn = 1.23–1.31). To estimate the reactivity of A and to characterize its living nature, the block copolymerization of A with 2-vinylpyridine (2VP) and methyl methacrylate (MMA) was performed. The well-defined block copolymers, poly(2VP)-b-poly(A) and poly(A)-b-poly(MMA), were successfully synthesized without any additives. © 2011 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2011" @default.
- W2066325087 created "2016-06-24" @default.
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- W2066325087 date "2011-09-26" @default.
- W2066325087 modified "2023-10-02" @default.
- W2066325087 title "Effect of isomeric pyridine moieties in ethynylstyrene derivatives on their anionic polymerization" @default.
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- W2066325087 doi "https://doi.org/10.1002/pola.24989" @default.
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