Journal ArticleDOI
Polyisobutylene-block-poly(methacrylic acid) diblock copolymers: self-assembly in aqueous media.
Markus Burkhardt,Nemesio Martinez-Castro,Sandrine Tea,Markus Drechsler,I. A. Babin,Ivan Grishagin,Ralf Schweins,Dmitry V. Pergushov,Michael Gradzielski,and Alexander B. Zezin,Axel H. E. Müller +10 more
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TLDR
The critical micellization concentration, estimated by means of fluorescence spectroscopy with the use of pyrene as a polarity probe, is decisively determined by the length of the PIB block and is insensitive to changes in the lengthof the PMAA block.Abstract:
Ionic amphiphilic diblock copolymer polyisobutylene-block-poly(methacrylic acid) (PIBx-b-PMAAy), with various lengths of nonpolar (x = 25−75) and polyelectrolyte (y = 170−2600) blocks, spontaneously dissolve in aqueous media at pH >4, generating macromolecular assemblies, the aggregation number of which depends on external stimuli (pH and ionic strength). Spherical micellar morphology with a compact core formed by the PIB blocks and a swollen corona built up from the PMAA blocks was deduced by cryogenic transmission electron microscopy. The micelles were further characterized by means of dynamic and static light scattering as well as small-angle neutron scattering. The critical micellization concentration, estimated by means of fluorescence spectroscopy with the use of pyrene as a polarity probe, is decisively determined by the length of the PIB block and is insensitive to changes in the length of the PMAA block.read more
Citations
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Polymeric Surfactants : Synthesis, Properties, and Links to Applications
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Theory of Block Polymer Micelles: Recent Advances and Current Challenges
TL;DR: An overview of existing theories of block polymer micelles is given in this article, where the authors focus on the equilibrium structure of nanoaggregates formed by solvophobic/solvophilic diblock copolymers in a dilute solution.
Journal ArticleDOI
Synthesis via RAFT Polymerization of Tadpole-Shaped Organic/Inorganic Hybrid Poly(acrylic acid) Containing Polyhedral Oligomeric Silsesquioxane (POSS) and Their Self-assembly in Water
TL;DR: In this article, a tadpole-shaped inorganic/organic hybrid poly(tert-butyl acrylate) was prepared by RAFT polymerization of tertbutyl-acrylate (tBA) using a POSS-containing chain transfer agent (CTA).
Journal ArticleDOI
Interpolyelectrolyte Complexes of Dynamic Multicompartment Micelles
Felix H. Schacher,Eva Betthausen,Andreas Walther,Andreas Walther,Holger Schmalz,Dmitry V. Pergushov,Axel H. E. Müller +6 more
TL;DR: The resulting multicompartmented IPECs exhibit dynamic behavior, highlighted by a structural relaxation within a period of 10 days, investigated by dynamic light scattering, cryogenic transmission electron microscopy (cryo-TEM), and scanning force microscopy(SFM).
Journal ArticleDOI
Counterion-Mediated Hierarchical Self-Assembly of an ABC Miktoarm Star Terpolymer
Andreas Hanisch,André H. Gröschel,Melanie Förtsch,Markus Drechsler,Hiroshi Jinnai,Thomas M. Ruhland,Felix H. Schacher,Axel H. E. Müller +7 more
TL;DR: Triiodide is utilized as a strongly polarizable counterion to induce hierarchical self-assembly of an ABC miktoarm star terpolymer comprising a polybutadiene (PB), a poly(tert-butyl methacrylate) (PtBMA), and apoly(N-methyl-2-vinylpyridinium) segment, for which the term "woodlouse" is introduced.
References
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