Abstract
Sequential anionic polymerizations of styrene and methyl methacrylate and 2-vinylpyridine in tetrahydrofuran (THF) were conducted in a plug flow reactor system with a static mixer. Polymers [polystyrene (PS), Mn: 120×103 g·mol−1, Mw/Mn: 1.08), poly(methyl methacrylate) (PMMA, Mn: 28×103 g·mol−1, Mw/Mn: 1.09), poly(2-vinylpyridine) (P2VP, Mn: 53×103 g·mol−1, Mw/Mn: 1.08), and PS-b-PMMA (Mn: 117×103 g·mol−1, Mw/Mn: 1.12)] with a precisely controlled high molecular weight were obtained using a 1,1-diphenylhexyllithium initiator in a plug flow reactor system. PS-b-PMMA, PMMA, and P2VP were obtained in the presence of LiCl. The molecular weight distribution, which was related to the mixing efficiency of the static mixer, decreased with increasing flow rate. Additionally, the molecular weight of the polymers could be adjusted by varying the flow rates. Open image in new window
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