Observation of constraint surface dynamics of polystyrene thin films by functionalization of a silsesquioxane cage

Taiki Hoshino, Shiki Nojima, Masanao Sato, Tomoyasu Hirai, Yuji Higaki, So Fujinami, Daiki Murakami, Shigesaburo Ogawa, Hiroshi Jinnai, Atsushi Takahara, Masaki Takata

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The surface dynamics of polyhedral oligomeric silsesquioxane (POSS)-functionalized polystyrene (PS-POSS) thin films above the glass transition temperature were studied by grazing-incidence X-ray photon correlation spectroscopy in order to elucidate the effects of POSS at the end of the polystyrene chains. Much slower fluctuations were observed in the surface of PS-POSS thin films than in the polystyrene thin films, despite the negligible difference in their bulk viscosity. Quantitative analysis based on fluctuation-dissipation theorem indicated that there is a high-viscosity layer at the surface of the PS-POSS films, and that the substrate interface originated from POSS segregation.

Original languageEnglish
Pages (from-to)487-499
Number of pages13
JournalPolymer
Volume105
DOIs
Publication statusPublished - 2016 Nov 22

Keywords

  • Capillary wave
  • Polymer thin film
  • X-ray photon correlation spectroscopy

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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    Hoshino, T., Nojima, S., Sato, M., Hirai, T., Higaki, Y., Fujinami, S., Murakami, D., Ogawa, S., Jinnai, H., Takahara, A., & Takata, M. (2016). Observation of constraint surface dynamics of polystyrene thin films by functionalization of a silsesquioxane cage. Polymer, 105, 487-499. https://doi.org/10.1016/j.polymer.2016.08.040