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Estimation of the linear thermal expansion coefficient in friction-deposited, oriented poly(tetrafluoroethylene) films by temperature-dependent lateral force microscopy

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Summary

Preliminary lateral force microscopy (LFM) results are presented which were obtained at different temperatures on thin films of poly(tetrafluoroethylene) prepared by friction deposition. Chain-chain distances of rodlike poly(tetrafluoroethylene) macromolecules were determined as a function of temperature from LFM images which exhibit molecular resolution. The value of the linear thermal expansion coefficient in the chain-perpendicular direction was estimated to be 3.5x10-3 [1/°C] in the temperature range between+10°C and+40°C. This value is higher than the literature data quoted for the temperature range between 0 °C and 25 °C. Possible reasons for this deviation are discussed.

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Authors and Affiliations

  1. Faculty of Chemical Technology, University of Twente, P.O. Box 217, NL-7500 AE, Enschede, The Netherlands

    Guobin Liu & G. Julius Vancso

  2. ABB Forschungszentrum, CH-5405, Baden-Dättwil, Switzerland

    Stefan Förster

Authors
  1. Stefan Förster
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  2. Guobin Liu
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  3. G. Julius Vancso
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Förster, S., Liu, G. & Vancso, G.J. Estimation of the linear thermal expansion coefficient in friction-deposited, oriented poly(tetrafluoroethylene) films by temperature-dependent lateral force microscopy. Polymer Bulletin 36, 471–476 (1996). https://doi.org/10.1007/BF00315065

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  • DOI: https://doi.org/10.1007/BF00315065

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