Relationship between twisting phenomenon and structural discontinuity of stacked lamellae in the spherulite of poly(ethylene adipate) as studied by the synchrotron X-ray microbeam technique

Kohji Tashiro, Taiyo Yoshioka, Hiroko Yamamoto, Hai Wang, Eamor Woo, Kenichi Funaki, Hiroki Murase

Research output: Contribution to journalArticle

Abstract

Wide-angle and small-angle X-ray scattering measurements were performed simultaneously using an X-ray beam 1 μm in size to detect the inner structure of a spherulite of poly(ethylene adipate) [PEA, –(O(CH 2 ) 2 OCO(CH 2 ) 4 CO–) n –]. The lamellae were found to twist periodically by 180° in the area between the neighboring bright rings observed in the polarized optical microscope image of the spherulite. However, as known from the discontinuity between the repeated lamellar zones discovered by Woo et al. (Macromolecules, 45:1375–1383, 2012), the twisted lamellae must not be assumed to be continuously twisted long plates spreading out over the spherulite. Rather, these lamellae should be considered to have limited areas of ~7 μm in length along the radial direction and with disconnected end zones. The present X-ray scattering data revealed the structural relation between the repeated arrays of the disconnected lamellar blocks and the 180° twisting phenomenon, which occurs only in the finite and disconnected flat-on lamellar zones.

Original languageEnglish
Pages (from-to)131-141
Number of pages11
JournalPolymer Journal
Volume51
Issue number2
DOIs
Publication statusPublished - 2019 Feb 1

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X ray scattering
Synchrotrons
Ethylene
X rays
Carbon Monoxide
Macromolecules
Microscopes
poly(ethylene adipate)
Direction compound

All Science Journal Classification (ASJC) codes

  • Polymers and Plastics
  • Materials Chemistry

Cite this

Tashiro, Kohji ; Yoshioka, Taiyo ; Yamamoto, Hiroko ; Wang, Hai ; Woo, Eamor ; Funaki, Kenichi ; Murase, Hiroki. / Relationship between twisting phenomenon and structural discontinuity of stacked lamellae in the spherulite of poly(ethylene adipate) as studied by the synchrotron X-ray microbeam technique. In: Polymer Journal. 2019 ; Vol. 51, No. 2. pp. 131-141.
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abstract = "Wide-angle and small-angle X-ray scattering measurements were performed simultaneously using an X-ray beam 1 μm in size to detect the inner structure of a spherulite of poly(ethylene adipate) [PEA, –(O(CH 2 ) 2 OCO(CH 2 ) 4 CO–) n –]. The lamellae were found to twist periodically by 180° in the area between the neighboring bright rings observed in the polarized optical microscope image of the spherulite. However, as known from the discontinuity between the repeated lamellar zones discovered by Woo et al. (Macromolecules, 45:1375–1383, 2012), the twisted lamellae must not be assumed to be continuously twisted long plates spreading out over the spherulite. Rather, these lamellae should be considered to have limited areas of ~7 μm in length along the radial direction and with disconnected end zones. The present X-ray scattering data revealed the structural relation between the repeated arrays of the disconnected lamellar blocks and the 180° twisting phenomenon, which occurs only in the finite and disconnected flat-on lamellar zones.",
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Relationship between twisting phenomenon and structural discontinuity of stacked lamellae in the spherulite of poly(ethylene adipate) as studied by the synchrotron X-ray microbeam technique. / Tashiro, Kohji; Yoshioka, Taiyo; Yamamoto, Hiroko; Wang, Hai; Woo, Eamor; Funaki, Kenichi; Murase, Hiroki.

In: Polymer Journal, Vol. 51, No. 2, 01.02.2019, p. 131-141.

Research output: Contribution to journalArticle

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