SANS studies on deformation Mechanism of slide-ring gel

Takeshi Karino, Yasushi Okumura, Changming Zhao, Toshiyuki Kataoka, Kohzo Ito, Mitsuhiro Shibayama

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Abstract

The deformation mechanism of "slide-ring" (SR) gels was investigated with small-angle neutron scattering (SANS). The SR gels were prepared by coupling α-cyclodextrin (CD) molecules on polyrotaxane chains consisting of poly(ethylene glycol) and CD. Because of a hollow structure of CD molecules, the cross-links made of CD molecules in a figure-of-eight shape can slide along the polymer chain. A normal butterfly pattern was observed for the first time in two-dimensional SANS isointensity profiles for the SR gels under uniaxial deformation, where the normal butterfly pattern means a prolate isointensity pattern in the direction perpendicular to the stretching direction. However, by either increasing the cross-link density or increasing the stretching ratio, the normal butterfly patterns changed to abnormal butterfly patterns as are commonly observed in conventional covalent-bonded chemical gels. The difference in the deformation mechanism as well as the cross-linking inhomogeneities between the SR gels and the covalent-bonded chemical gels is discussed by focusing on the unique architecture of the SR gels.

Original languageEnglish
Pages (from-to)6161-6167
Number of pages7
JournalMacromolecules
Volume38
Issue number14
DOIs
Publication statusPublished - Jul 12 2005
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

Cite this

Karino, T., Okumura, Y., Zhao, C., Kataoka, T., Ito, K., & Shibayama, M. (2005). SANS studies on deformation Mechanism of slide-ring gel. Macromolecules, 38(14), 6161-6167. https://doi.org/10.1021/ma050624v