Journal
EUROPEAN POLYMER JOURNAL
Volume 83, Issue -, Pages 517-528Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.eurpolymj.2016.05.017
Keywords
Ferrocene; Polymer brush; Electrochemistry; Redox-active; Mechanical properties
Categories
Funding
- National Research Foundation
- Prime Minister's office, Singapore under its Medium sized centre programme
- NRF [NRF-RF 2010-03]
- Agency for Science, Technology and Research (A*STAR), Singapore
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This paper describes the preparation of ferrocene-containing polymer brushes with different side chain lengths by surface-initiated atom transfer radical polymerization (SI-ATRP). The polymer brushes are characterized by cyclic voltammetry to determine the surface coverage of the ferrocene (Fc) units, their thickness in air by atomic force microscopy (AFM) and ellipsometry, and their mechanical properties by AFM-based nanoindentation. The results are compared against an ideal packing model and we conclude that brushes with short linkers between the Fc units and the polymer back bone are stiff and stand up in air up to 40 nm tall. In contrast, polymers with long linkers collapse and do not stand up in air. Our results indicate that the stiffness and packing structure of Fc-containing poly-. mer brushes are affected by the length of the linkers between the Fc and polymer back bone. (C) 2016 Elsevier Ltd. All rights reserved.
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