Mechanism of morphological transition from lamellar/perforated layer to gyroid phases

Jong Hyun Ahn, Wang Cheol Zin

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20 Citations (Scopus)


We investigated epitaxial relations of phase transitions between the lamellar (L), hexagonally perforated layers (HPL), and gyroid (G) morphologies in styrene-isoprene diblock copolymer (PSI) and polyisoprene (PI)/PSI blend using rheology and small angle X-ray scattering (SAXS) techniques. In HPL→G transitions, six spot patterns of G phase were observed in two-dimensitional SAXS pattern. On the other hand, in direct L→G transition without appearance of HPL phase, the polydomain patterns of G phase were observed. From present study, it was understood that direct L→G transition of blend may be suppressed by high-energy barrier of transition and mismatches in domain orientation between epitaxially related lattice planes.

Original languageEnglish
Pages (from-to)152-156
Number of pages5
JournalMacromolecular Research
Issue number3
Publication statusPublished - 2003 Jun

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry


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