モデルフィラー界面におけるゴム状高分子のダイナミクス

DOI Web Site Web Site 参考文献14件

書誌事項

タイトル別名
  • Dynamics of Rubbery Chains at a Model Filler Interface
  • モデルフィラー カイメン ニ オケル ゴムジョウ コウブンシ ノ ダイナミクス

この論文をさがす

抄録

<p>The rotational relaxation time of a fluorescent molecule dispersed in rubbery polymers was characterized by time-resolved fluorescence anisotropy (TRFA) measurement and an attempt was made to quantitatively combine it with the segmental relaxation time of the corresponding polymer obtained by dielectric relaxation spectroscopy. Then, we show that the segmental relaxation time extrapolated to higher temperatures using the Vogel-Fulcher-Tammann law could be superimposed on the rotational relaxation time, resulting in a single curve. This behavior was common for polyisoprene and acrylonitrile/butadiene copolymer, implying that the rotational dynamics of a fluorescence probe is a useful tool for the characterization of polymer dynamics. Once this was established, TRFA was applied to a model filler interface combining with the evanescent wave excitation. Also, sum-frequency generation spectroscopy, which provides the best depth resolution among available techniques, was used. We found the presence of the dynamics gradient of chains in the interfacial region with the SiO2 surface and tried to assign it to the two kinds of adsorbed chains, namely loosely and strongly adsorbed, at the interface. The segmental relaxation of chains in the strongly adsorbed layer at the interface could be slower than that of bulk chains by more than 10 orders.</p>

収録刊行物

  • 日本ゴム協会誌

    日本ゴム協会誌 92 (9), 357-362, 2019

    一般社団法人 日本ゴム協会

参考文献 (14)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ