Photoinduced Synthesis of α,ω-Telechelic Sequence-Controlled Multiblock Copolymers
作者： Athina Anastasaki , Vasiliki Nikolaou , Nicholas William McCaul , Alexandre Simula , Jamie Godfrey
DOI: 10.1021/ACS.MACROMOL.5B00058
关键词:
摘要: Photoinduced living radical polymerization has been employed to synthesize α,ω-telechelic multiblock copolymers of a range acrylic monomers including methyl acrylate (MA), ethyl (EA), ethylene glycol ether (EGA), and solketal (SA). Under carefully optimized conditions, well-defined tricosablock (23 blocks) copolymer was obtained (Đ = 1.18) with high conversion (>98%) achieved throughout all the iterative monomer additions. Crucially, reduced temperature (15 °C) found result in an observed decrease dispersities (1.14 vs 1.45) as opposed when higher temperatures (50 were employed. A number bifunctional initiators employed, bis(2-bromoisobutyrate) (EbBiB), PEG initiator (average Mw 1000 g mol–1), bis[2-(2′-bromoisobutyryloxy)ethyl] disulfide ((BiBOE)2S2), resulting narrow dispersed various molecular weights (DPn ∼ 2/13/50/100 per block). Impressively, weight undecabloc...
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