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Synthesis of block copolymer nano-assemblies via ICAR ATRP and RAFT dispersion polymerization: how ATRP and RAFT lead to differences

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Abstract

Block copolymer nano-assemblies were synthesized via initiators for continuous activator regeneration atom transfer radical polymerization (ICAR ATRP) dispersion polymerization employing the CuBr2/tris(2-pyridylmethyl)amine catalyst in an alcoholic solvent at a relatively low temperature of 45 °C. The typical poly(ethylene glycol)-block-polystyrene (PEG-b-PS) nano-assemblies synthesized via ICAR ATRP dispersion polymerization are compared with those synthesized via RAFT dispersion polymerization under other similar conditions. It is found that the PEG45-b-PS nano-assemblies, e.g., including lamellas, vesicles and vesicular clusters, synthesized via ICAR ATRP dispersion polymerization have very complicated morphologies, which are different from those synthesized via RAFT dispersion polymerization. The reasons leading to the differences are investigated, and it is conclusively supposed that the high Đ of the synthesized BCPs and the salt of the copper catalyst used in ICAR ATRP dispersion polymerization should be involved. This low temperature initiated ICAR ATRP dispersion polymerization is believed to be a valid method to prepare block copolymer nano-assemblies through polymerization-induced self-assembly.

Graphical abstract: Synthesis of block copolymer nano-assemblies via ICAR ATRP and RAFT dispersion polymerization: how ATRP and RAFT lead to differences

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Publication details

The article was received on 19 Dec 2018, accepted on 23 Jan 2019 and first published on 24 Jan 2019


Article type: Paper
DOI: 10.1039/C8PY01799A
Citation: Polym. Chem., 2019, Advance Article

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    Synthesis of block copolymer nano-assemblies via ICAR ATRP and RAFT dispersion polymerization: how ATRP and RAFT lead to differences

    S. Qu, K. Wang, H. Khan, W. Xiong and W. Zhang, Polym. Chem., 2019, Advance Article , DOI: 10.1039/C8PY01799A

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