Premium
Unexpected Intermediate State for the Cylinder‐to‐Gyroid Transition in a Block Copolymer Solution
Author(s) -
Wang ChiaYing,
Lodge Timothy P.
Publication year - 2002
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/1521-3927(20020101)23:1<49::aid-marc49>3.0.co;2-x
Subject(s) - gyroid , copolymer , materials science , cylinder , scattering , phase transition , rheology , polystyrene , polymer chemistry , condensed matter physics , polymer , optics , composite material , physics , geometry , mathematics
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.