Free volume expansion and nanofoaming of supercritical carbon dioxide treated polystyrene

Toshitaka Oka, Kenji Ito, Chunqing He, Cedric Dutriez, Hideaki Yokoyama, Yoshinori Kobayashi

研究成果: Article

23 引用 (Scopus)

抜粋

Free volume of polystyrene films treated with supercritical carbon dioxide (SCCO2) were examined by positron annihilation lifetime spectroscopy. Variation of the free volume sizes after the SCCO2 treatment due to the release of trapped CO2 and structural relaxation of the polymer was observed. After 500 h from the depressurization, the free volume of the treated films free from CO2 was ∼0.306 nm in radius and much larger than that of the untreated films of ∼0.295 nm in radius due to the freezing of the swollen structure caused by the large solubility of CO 2.

元の言語English
ページ(範囲)12191-12194
ページ数4
ジャーナルJournal of Physical Chemistry B
112
発行部数39
DOI
出版物ステータスPublished - 2008 10 2
外部発表Yes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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  • これを引用

    Oka, T., Ito, K., He, C., Dutriez, C., Yokoyama, H., & Kobayashi, Y. (2008). Free volume expansion and nanofoaming of supercritical carbon dioxide treated polystyrene. Journal of Physical Chemistry B, 112(39), 12191-12194. https://doi.org/10.1021/jp802188p