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I22-Small angle scattering & Diffraction	Rational synthesis of low-polydispersity block copolymer vesicles in concentrated solution via polymerization-induced self-assembly Carlo Gonzato , Mona Semsarilar , Elizabeth R. Jones , Feng Li , Gerard J. P. Krooshof , Paul Wyman , Oleksandr Mykhaylyk , Remco Tuinier , Steven P. Armes Journal Of The American Chemical Society 136 (31), 11100 - 11106 DOI: 10.1021/ja505406s Diamond Proposal Number(s): [8001] Open Access Show Abstract ▼ Abstract: Block copolymer self-assembly is normally conducted via post-polymerization processing at high dilution. In the case of block copolymer vesicles (or “polymersomes”), this approach normally leads to relatively broad size distributions, which is problematic for many potential applications. Herein we report the rational synthesis of low-polydispersity diblock copolymer vesicles in concentrated solution via polymerization-induced self-assembly using reversible addition–fragmentation chain transfer (RAFT) polymerization of benzyl methacrylate. Our strategy utilizes a binary mixture of a relatively long and a relatively short poly(methacrylic acid) stabilizer block, which become preferentially expressed at the outer and inner poly(benzyl methacrylate) membrane surface, respectively. Dynamic light scattering was utilized to construct phase diagrams to identify suitable conditions for the synthesis of relatively small, low-polydispersity vesicles. Small-angle X-ray scattering (SAXS) was used to verify that this binary mixture approach produced vesicles with significantly narrower size distributions compared to conventional vesicles prepared using a single (short) stabilizer block. Calculations performed using self-consistent mean field theory (SCMFT) account for the preferred self-assembled structures of the block copolymer binary mixtures and are in reasonable agreement with experiment. Finally, both SAXS and SCMFT indicate a significant degree of solvent plasticization for the membrane-forming poly(benzyl methacrylate) chains.	Aug 2014

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I22-Small angle scattering & Diffraction

Rational synthesis of low-polydispersity block copolymer vesicles in concentrated solution via polymerization-induced self-assembly

Carlo Gonzato , Mona Semsarilar , Elizabeth R. Jones , Feng Li , Gerard J. P. Krooshof , Paul Wyman , Oleksandr Mykhaylyk , Remco Tuinier , Steven P. Armes

Journal Of The American Chemical Society 136 (31), 11100 - 11106

DOI: 10.1021/ja505406s

Diamond Proposal Number(s): [8001]