Jump to main content
Jump to site search

Issue 30, 2012
Previous Article Next Article

Phase structural formation and oscillation in polystyrene-block-polydimethylsiloxane thin films

Author affiliations

Abstract

The solvent-induced spherical structure in a polystyrene-block-polydimethylsiloxane (PS-b-PDMS) block copolymer was obtained and stabilized by preparing both the bulk and thin films from propylene glycol methyl ether acetate (PGMEA) solutions. The diblock copolymer possessed a total molecular weight of 42 kDa with a PS volume fraction of 72.2%, and it formed a cylindrical phase structure in the equilibrium bulk state. During thermal annealing, only changes in the sphere size and packing rearrangement were found. In contrast, a unique structure evolution route was observed during solvent treatments. Under a controlled vapour of a PS selective solvent, an oscillation of the structural transition between spheres and cylinders was observed in the thin films. The kinetics of this oscillation of structural transition was found to be closely related to the solvent vapour concentration and film thickness. This experiment revealed a unique ordering pathway towards the equilibrium structure in the thin film for this strongly segregated PS-b-PDMS diblock copolymer.

Graphical abstract: Phase structural formation and oscillation in polystyrene-block-polydimethylsiloxane thin films

Back to tab navigation

Publication details

The article was received on 30 Mar 2012, accepted on 29 May 2012 and first published on 02 Jul 2012


Article type: Paper
DOI: 10.1039/C2SM25749A
Citation: Soft Matter, 2012,8, 7937-7944
  •   Request permissions

    Phase structural formation and oscillation in polystyrene-block-polydimethylsiloxane thin films

    I. Hsieh, H. Sun, Q. Fu, B. Lotz, K. A. Cavicchi and S. Z. D. Cheng, Soft Matter, 2012, 8, 7937
    DOI: 10.1039/C2SM25749A

Search articles by author

Spotlight

Advertisements