Surface composition control via chain end segregation in blend films of polystyrene and poly(vinyl methyl ether)

Daisuke Kawaguchi, Keiji Tanaka, Tisato Kajiyama, Atsushi Takahara, Seiji Tasaki

研究成果: Contribution to journalArticle査読

34 被引用数 (Scopus)

抄録

Surface aggregation states in miscible blends of monodisperse polystyrene (PS) and poly-(vinyl methyl ether) (PVME) were studied by X-ray photoelectron spectroscopy (XPS) in conjunction with neutron reflectivity (NR). In the case of symmetric blends in terms of degree of polymerization, N, PVME and PS were preferentially segregated at the film surface and the interface with a silicon wafer, respectively, to minimize free energy of the system. The concentration profile near the surface obtained by experiments was consistent with a mean-field prediction. Also, the surface composition in symmetric blends composed of PS terminated by fluoroalkyl groups at both ends (α,ω-PS(Rf)2) and PVME was examined. In this case, the surface enrichment of PVME was suppressed by virtue of the surface localization of fluoroalkyl end groups, and the composition was strongly dependent on N. The surface in asymmetric α,ω-PS(Rf)2/PVME blend, in which N of α,ω-PS(Rf)2 was much smaller than that of PVME, was mostly covered with the PS segments. The results presented imply a possibility that the surface composition in miscible polymer mixtures could be perfectly regulated combining the chain end effect with the molecular weight disparity between the components.

本文言語英語
ページ(範囲)6824-6830
ページ数7
ジャーナルMacromolecules
36
18
DOI
出版ステータス出版済み - 9 9 2003

All Science Journal Classification (ASJC) codes

  • 有機化学
  • ポリマーおよびプラスチック
  • 無機化学
  • 材料化学

フィンガープリント

「Surface composition control via chain end segregation in blend films of polystyrene and poly(vinyl methyl ether)」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル