Authors
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Onah, J.E. ; Oertel, U. ; Froeck, C. ; Kratzmüller, Th. ; Steinert, V. ; Bayer, Th. ; Hartmann, L. ; Häußler, L. ; Lunkwitz, K.
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Title
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Ultrathin Films from Fluorine Containing Polymers: Fabrication and Characterization
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Date
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31.12.2002
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Number
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11280
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Abstract
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Monolayers and ultrathin films of some fluorine containing polymers were prepared by the Langmuir-Blodgett (LB) technique. The polymers were obtained using two main synthetic approaches: firstly, polyamide (PA-1) and polyimide (PI-1) were prepared from direct polycondensation of 4,4<IMGSRC="/giflibrary/12/prime.gif"BORDER="0">-hexafluoroisopropylidenediphthalic anhydride and 4,4<IMGSRC="/giflibrary/12/prime.gif"BORDER="0">-hexafluoroisopropylidenedianiline in <I>N</I>-methyl-2-pyrrolidone (NMP). The thermogravimetric analysis (TGA) for PI-1 yielded 580°C by 1% weight loss. They formed stable monolayers with a collapse pressure of 62 mN/m and a collapse area of 0.20 nm<SUP>2</SUP> per repeat unit (R.U.) in the case of PA-1, for PI-1 the collapse pressure was 60 mN/m associated with a collapse area of 0.23 nm<SUP>2</SUP> per R.U. Secondly, poly[(maleic acid perfluorooctylamide-imide)-<I>co</I>-ethylene] (PAPE) with fluorinated side chains was synthesized from poly[(maleic anhydride)-<I>co</I>-ethylene]. They formed stable monolayers too. Multilayer depositions onto various substrates were possible for all the synthesized polymers. LB films were characterized by ultra-violet/visible spectroscopy (UV-Vis), surface plasmon resonance (SPR), dielectric spectroscopy and atomic force microscopy (AFM). Gas phase polymerization of tetrafluoropropyl methacrylate (TFPM) was carried out in the presence of macroinitiator, poly[octadecene-<I>co</I>-(maleic anhydride)] modif<br />ied with <I>tert</I>-butyl hydroperoxide. Film thickness could be controlled on different hydrophobic substrates varying the reaction time.
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Publisher
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Macromolecular Materials and Engineering
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Wikidata
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Citation
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Macromolecular Materials and Engineering 287 (2002) 412-419
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DOI
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https://doi.org/10.1002/1439-2054(20020601)287:6<412::AID-MAME412>3.0.CO;2-V
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Tags
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