Chinese Journal of Polymer Science

, Volume 31, Issue 9, pp 1250–1259

Deviations from bulk morphologies in thin films of block copolymer/additive binary blends

  • Xin-yu Wei
  • Wei-yin Gu
  • Xiao-bo Shen
  • Joseph Strzalka
  • Zhang Jiang
  • Thomas P. Russell
Paper

DOI: 10.1007/s10118-013-1320-x

Cite this article as:
Wei, X., Gu, W., Shen, X. et al. Chin J Polym Sci (2013) 31: 1250. doi:10.1007/s10118-013-1320-x
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Abstract

Deviations from bulk morphologies in thin films of binary blends of alkyne-functionalized diblock copolymer poly(ethylene oxide)-block-poly(n-butyl methacrylate-random-propargyl methacrylate) (PEO-b-P(nBMA-r-PgMA)) and Rhodamine B azide are reported, where thermal click reaction between the two components leads to microphase separated morphologies. Both in the bulk and in thin films, increasing the azide loading ratio resulted in the transition from a lamellar microdomain morphology to a hexagonally packed cylindrical mircodomain morphology. However, in thin films the lamellae-cylinder transition was observed at a different azide loading ratio, which was determined by film thickness. As a result, significant deviations from the bulk morphology were observed. These results indicate that surface interactions and confined geometry can play an important role in dictating the morphology in thin films of BCP/additive binary blends.

Keywords

Block copolymerMorphologyThin film

Copyright information

© Chinese Chemical Society, Institute of Chemistry, Chinese Academy of Sciences and Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Xin-yu Wei
    • 1
  • Wei-yin Gu
    • 1
  • Xiao-bo Shen
    • 1
  • Joseph Strzalka
    • 2
  • Zhang Jiang
    • 2
  • Thomas P. Russell
    • 1
  1. 1.Department of Polymer Science and EngineeringUniversity of MassachusettsAmherstUSA
  2. 2.X-ray Science DivisionArgonne National LaboratoryArgonneUSA