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SAXS study of the lamellar-cylindrical transition in the PI-b-MP(OG) supramolecules' system

Bondzic, S., Polushkin, E., Ruokolainen, J. & ten Brinke, G., 27-May-2008, In : Polymer. 49, 11, p. 2669-2677 9 p.

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A detailed SAXS study of self-assembled block copolymer-based supramolecules composed of a poly-isoprene-block-poly(2-vinylpyridine) diblock copolymer and octyl gallate that is hydrogen bonded to the vinylpyridine block in a stoichiometric ratio is presented. The changes in the system morphology with temperature are investigated both at rest and under oscillatory shear. In between the lamellar-to-cylindrical transition a new intermediate structure, identified as a deformed hexagonal structure (DHS), was observed. Being at rest the DHS is argued to consist of ellipsoidal cylinders that adopt a More regular circular shape when the sample is subjected to shear. These results are discussed in terms of hydrogen bond breaking under shear. (c) 2008 Elsevier Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)2669-2677
Number of pages9
JournalPolymer
Volume49
Issue number11
Publication statusPublished - 27-May-2008

    Keywords

  • self-assembly, supramolecules, order-order transitions, DIBLOCK COPOLYMER TEMPLATES, COMB-SHAPED SUPRAMOLECULES, ORDER-ORDER TRANSITION, SODIUM ALKYL SULFATE, X-RAY-SCATTERING, BLOCK-COPOLYMER, FUNCTIONAL MATERIALS, POLYMERIC MATERIALS, THIN-FILMS, MESOPHASES

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