Core-shell gyroid morphology in a poly(isoprene-block-styrene-block- dimethylsiloxane) triblock copolymer

T. A. Shefelbine, M. E. Vigild, M. W. Matsen, D. A. Hajduk, M. A. Hillmyer, E. L. Cussler, F. S. Bates

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165 Scopus citations

Abstract

We report a new morphology in a poly(isoprene-block-styrene-block- dimethylsiloxane) ABC triblock copolymer. The most probable symmetry of the morphology (Ia3d) was determined from two-dimensional SAXS measurements performed on a sample with long-range order induced by an oscillatory shear field. By comparing the predictions of self-consistent field theory with TEM and SAXS and SANS powder diffraction patterns, we deduced that the morphology is a core-shell gyroid comprised of two independent and triply periodic poly(dimethylsiloxane) networks encased in poly(styrene) shells and separated by a continuous poly(isoprene) domain. Thus, this unique nanostructure divides space into five independent, three-dimensionally continuous domains.

Original languageEnglish (US)
Pages (from-to)8457-8465
Number of pages9
JournalJournal of the American Chemical Society
Volume121
Issue number37
DOIs
StatePublished - Sep 22 1999

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