| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5187153 | Polymer | 2008 | 9 Pages |
Abstract
A detailed SAXS study of self-assembled block copolymer-based supramolecules composed of a polyisoprene-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.
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Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
Sasa Bondzic, Evgeny Polushkin, Janne Ruokolainen, Gerrit ten Brinke,