Title of article
SAXS study of the lamellar–cylindrical transition in the PI-b-P2VP(OG) supramoleculesʹ system
Author/Authors
Bondzic، نويسنده , , Sasa and Polushkin، نويسنده , , Evgeny and Ruokolainen، نويسنده , , Janne and ten Brinke، نويسنده , , Gerrit، نويسنده ,
Issue Information
دوهفته نامه با شماره پیاپی سال 2008
Pages
9
From page
2669
To page
2677
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.
Keywords
Order–order transitions , Supramolecules , SELF-ASSEMBLY
Journal title
Polymer
Serial Year
2008
Journal title
Polymer
Record number
1731683
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