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One‐Pot Synthesis of Double Poly(Ionic Liquid) Block Copolymers by Cobalt‐Mediated Radical Polymerization‐Induced Self‐Assembly (CMR‐PISA) in Water
Author(s) -
Cordella Daniela,
Debuigne Antoine,
Jérôme Christine,
Kochovski Zdravko,
Taton Daniel,
Detrembleur Christophe
Publication year - 2016
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201600039
Subject(s) - copolymer , polymer chemistry , polymerization , ionic liquid , monomer , bromide , amphiphile , radical polymerization , materials science , alkyl , cobalt , polymer , chemistry , organic chemistry , catalysis
Amphiphilic double poly(ionic liquid) (PIL) block copolymers are directly prepared by cobalt‐mediated radical polymerization induced self‐assembly (CMR‐PISA) in water of N ‐vinyl imidazolium monomers carrying distinct alkyl chains. The cobalt‐mediated radical polymerization of N ‐vinyl‐3‐ethyl imidazolium bromide (VEtImBr) is first carried out until high conversion in water at 30 °C, using an alkyl bis(acetylacetonate)cobalt(III) adduct as initiator and controlling agent. The as‐obtained hydrophilic poly( N ‐vinyl‐3‐ethyl imidazolium bromide) (PVEtImBr) is then used as a macroinitiator for the CMR‐PISA of N ‐vinyl‐3‐octyl imidazolium bromide (VOcImBr). Self‐assembly of the amphiphilic PVEtImBr‐ b ‐PVOcImBr block copolymer, i.e., of PIL‐ b ‐PIL‐type, rapidly takes place in water, forming polymer nanoparticles consisting of a hydrophilic PVEtImBr corona and a hydrophobic PVOcImBr core. Preliminary investigation into the effect of the size of the hydrophobic block on the dimension of the nanoparticles is also described.