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

Jong Hyun Ahn; Wang Cheol Zin

doi:10.1007/BF03218345

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

Jong Hyun Ahn, Wang Cheol Zin

Department of Electrical and Electronic Engineering

Research output: Contribution to journal › Article › peer-review

20 Citations (Scopus)

Abstract

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 language	English
Pages (from-to)	152-156
Number of pages	5
Journal	Macromolecular Research
Volume	11
Issue number	3
DOIs	https://doi.org/10.1007/BF03218345
Publication status	Published - 2003 Jun

All Science Journal Classification (ASJC) codes

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

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10.1007/BF03218345

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title = "Mechanism of morphological transition from lamellar/perforated layer to gyroid phases",

abstract = "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.",

author = "Ahn, {Jong Hyun} and Zin, {Wang Cheol}",

year = "2003",

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doi = "10.1007/BF03218345",

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T1 - Mechanism of morphological transition from lamellar/perforated layer to gyroid phases

AU - Ahn, Jong Hyun

AU - Zin, Wang Cheol

PY - 2003/6

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N2 - 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.

AB - 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.

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JO - Macromolecular Research

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

Abstract

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