Morphology of miktoarm star block copolymers of styrene and isoprene

Y. Tselikas*, H. Iatrou, Nikolaos Hadjichristidis, K. S. Liang, K. Mohanty, D. J. Lohse

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

97 Scopus citations

Abstract

The morphologies of several styrene-isoprene miktoarm star copolymers have been examined by small angle x-ray scattering and electron microscopy. Three of these polymers were of the three-armed A2B type, and six were four-armed A3B miktoarms. The ordered microphase-separated morphologies displayed by these polymers were seen to be highly dependent on the architecture of the chains, and were quite different from those that occur in the corresponding linear block copolymers. These results can be quite well explained by a theory of Milner which is based on the bending energy of the microphase interface and the ability of the chains to stretch away from the interface between the microphases. We speculate that the small differences between the observations and theoretical predictions are due to the effects of the compression of chains in small gaps between adjacent domains.

Original languageEnglish (US)
Pages (from-to)2456-2462
Number of pages7
JournalJournal of Chemical Physics
Volume105
Issue number6
DOIs
StatePublished - Aug 8 1996

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this