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Solvent-control over monomer distribution in the copolymerization of 2-oxazolines and the effect of a gradient structure on self-assembly
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SYSNO ASEP 0508824 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Solvent-control over monomer distribution in the copolymerization of 2-oxazolines and the effect of a gradient structure on self-assembly Author(s) Bera, D. (BE)
Sedlacek, O. (BE)
Jäger, Eliezer (UMCH-V) ORCID, RID
Pavlova, Ewa (UMCH-V) RID
Vergaelen, M. (BE)
Hoogenboom, R. (BE)Source Title Polymer Chemistry . - : Royal Society of Chemistry - ISSN 1759-9954
Roč. 10, č. 37 (2019), s. 5116-5123Number of pages 8 s. Language eng - English Country GB - United Kingdom Keywords gradient copolymers ; poly(2-oxazoline)s ; solvent-controlled monomer distribution Subject RIV CD - Macromolecular Chemistry OECD category Polymer science R&D Projects GA17-09998S GA ČR - Czech Science Foundation (CSF) TN01000008 GA TA ČR - Technology Agency of the Czech Republic (TA ČR) Method of publishing Limited access Institutional support UMCH-V - RVO:61389013 UT WOS 000487564000008 EID SCOPUS 85072656412 DOI 10.1039/C9PY00927B Annotation ne-pot synthesis of gradient copolymers by statistical copolymerization represents an elegant route to amphiphilic copolymers as a basis for micellar systems. Herein, we propose a robust strategy to control the monomer distribution along the gradient copolymer chain by appropriate selection of the polymerization solvent. The gradient formation was investigated for copolymerizations of the hydrophilic 2-methyl-2-oxazoline (MeOx) and the hydrophobic 2-phenyl-2-oxazoline (PhOx) using sulfolane and acetonitrile as the polymerization solvents revealing a striking difference. In sulfolane, a quasi-block (CP2) like character was observed, whereas acetonitrile led to a more gradient-like (CP3) copolymer. The monomer distribution was found to have an impact on the micellization behavior of both amphiphilic copolymers, which was also compared with the analogous block copolymer (CP1). CP1 led to the formation of the smallest micelles, followed by a somewhat larger structure formed by CP2, while CP3 self-assembles into significantly larger nanoparticles. These findings open up a route to new amphiphilic copolymer systems with precisely fine-tuned architecture. Workplace Institute of Macromolecular Chemistry Contact Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Year of Publishing 2020 Electronic address https://pubs.rsc.org/en/content/articlelanding/2019/PY/C9PY00927B#!divAbstract
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