Jump to main content
Jump to site search

Issue 20, 2018
Previous Article Next Article

Glassy worm-like micelles in solvent and shear mediated shape transitions

Author affiliations

Abstract

The glassiness of polymer melts is generally considered to be suppressed by small dimensions, added solvent, and heat. Here, we suggest that glassiness persists at the nanoscale in worm-like micelles composed of amphiphilic diblock copolymers of poly(ethylene oxide)–polystyrene (PS). The glassiness of these worms is indicated by a lack of fluorescence recovery after photobleaching as well as micron-length rigid segments separated by hinges. The coarse-grained molecular dynamics studies probe the dynamics of the PS in these glassy worms. Addition of an organic solvent promotes a transition from hinged to fully flexible worms and to spheres or vesicles. Simulation demonstrates two populations of organic solvent in the core of the micelle—a solvent ‘pool’ in the micelle core and a second population that accumulates at the interface between the core and the corona. The stable heterogeneity of the residual solvent could explain the unusual hinged rigidity, but solvent removal during shear-extension could be more effective and yield – as observed – nearly straight worms without hinges.

Graphical abstract: Glassy worm-like micelles in solvent and shear mediated shape transitions

Back to tab navigation

Supplementary files

Publication details

The article was received on 09 Jan 2018, accepted on 26 Apr 2018 and first published on 30 Apr 2018


Article type: Paper
DOI: 10.1039/C8SM00080H
Citation: Soft Matter, 2018,14, 4194-4203
  •   Request permissions

    Glassy worm-like micelles in solvent and shear mediated shape transitions

    K. Chakraborty, K. Vijayan, A. E. X. Brown, D. E. Discher and S. M. Loverde, Soft Matter, 2018, 14, 4194
    DOI: 10.1039/C8SM00080H

Search articles by author

Spotlight

Advertisements