SAXS study of the lamellar-cylindrical transition in the PI-b-MP(OG) supramolecules' systemBondzic, S., Polushkin, E., Ruokolainen, J. & ten Brinke, G., 27-May-2008, In : Polymer. 49, 11, p. 2669-2677 9 p.
Research output: Contribution to journal › Article › Academic › peer-review
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.
|Number of pages||9|
|Publication status||Published - 27-May-2008|
- 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