論文

査読有り
2013年2月

influence of the primary structure of the main chain on backbone stiffness of cylindrical rod brushes

POLYMER JOURNAL
  • Yuta Saito
  • ,
  • Le Thi Ngoc Lien
  • ,
  • Yuji Jinbo
  • ,
  • Jiro Kumaki
  • ,
  • Atsushi Narumi
  • ,
  • Seigou Kawaguchi

45
2
開始ページ
193
終了ページ
201
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1038/pj.2012.117
出版者・発行元
NATURE PUBLISHING GROUP

The dimensional properties of rod brushes consisting of a flexible polymethacrylate main chain and poly(n-hexyl isocyanate; PHIC) rod side chains have been studied using static light and small-angle X-ray scattering (SAXS) techniques in tetrahydrofuran (THF) at 25 degrees C. The results are compared with those consisting of a flexible polystyrene main chain and PHIC side chains (VB-HIC-N-s-H, where N-s is the weight-averaged degree of polymerization of HIC). The rod brushes were prepared through the radical homopolymerizations of alpha-methacryloyloxyethoxy-omega-acetyl-PHIC macromonomer (MA-HIC-61-Ac) in n-hexane at 60 degrees C. The molecular weight dependence of the z-averaged mean-square radius of gyration (< R-g(2)>(z)) of the brush is quantitatively described in terms of the wormlike cylinder model taking into account the end effects. The main chain stiffness parameter (lambda(-1)(M)) is determined to be 197 nm for poly(MA-HIC-61-Ac), which is approximately three times greater than that for poly(VB-HIC-62-H), which has a polystyrene main chain and the same rod length. The considerably larger stiffness in the polymethacrylate than in the polystyrene is most likely responsible for the larger effective excluded volume effects produced by the freely rotating spacer between the main chain and side rod. A single rod brush of poly(MA-HIC-61-Ac) on a mica surface is clearly observed using atomic force microscopy to reasonably demonstrate the cylindrical rod brushes. Polymer Journal (2013) 45, 193-201; doi:10.1038/pj.2012.117; published online 20 June 2012

Web of Science ® 被引用回数 : 11

リンク情報
DOI
https://doi.org/10.1038/pj.2012.117
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000315239100011&DestApp=WOS_CPL

エクスポート
BibTeX RIS