The cylinder-to-gyroid transition in a concentrated solution of polystyrene-block-polyisoprene in dibutyl phthalate has been studied using rheology and small angle X-ray scattering. Following an appropriate temperature quench, the oriented cylinder phase transforms to the gyroid structure epitaxially. Remarkably, an intermediate state appears for a deep quench, whereas for a shallow quench the transition proceeds directly; the intermediate state exhibits scattering signatures consistent with a hexagonally perforated layer structure.
|Original language||English (US)|
|Number of pages||6|
|Journal||Macromolecular Rapid Communications|
|State||Published - Jan 9 2002|
- Block copolymers
- Order-order transition