Polymer loops vs. brushes on surfaces: Adsorption, kinetics, and viscoelastic behavior of α,ω-thiol telechelics on gold

Derek Patton, Wolfgang Knoll, Rigoberto C. Advincula

研究成果: Article査読

25 被引用数 (Scopus)

抄録

Telechelic thiopolymers were explored towards formation of doubly-bound (polymer loops) vs. singly-bound (polymer brushes) chains on gold substrates. The conformation, adsorption kinetics, and viscoelastic properties of the α,ω-dithiol and monothiol PS telechelics were investigated by means of XPS and QCM-D techniques. The oxidation behavior of the free thiol proved to be important for distinguishing doubly-bound vs. singly-bound chains. The results show a critical dependence of M̄n on the ability to obtain polymer loops. Comparison with unperturbed dimensions obtained by scaling theory show that the loop is less stretched and occupies more lateral space than the brush. The results are important in demonstrating the different and perhaps superior properties of polymer loops vs. singly-bound polymer brushes. Telechelic thiol polymers are explored towards the formation of doubly-bound polymer chains (polymer loops) vs. singly-bound polymer chains (polymer brushes) on surfaces. The importance of this phenomenon is in controlling the chemisorption of end-functionalized polymers with applications in lubrication, bio-surfaces, and sensing.

本文言語English
ページ(範囲)485-497
ページ数13
ジャーナルMacromolecular Chemistry and Physics
212
5
DOI
出版ステータスPublished - 2011 3月 1
外部発表はい

ASJC Scopus subject areas

  • 材料化学
  • ポリマーおよびプラスチック
  • 有機化学
  • 物理化学および理論化学
  • 凝縮系物理学

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