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Measurement of the Loss Tangent of a Thin Polymeric Film Using the Atomic Force Microscope



P M. McGuiggan, D J. Yarusso


An atomic force microscope (AFM) was used to measure the tan delta of a pressure sensitive adhesive transfer tape as a function of frequency (0.01 Hz to 100 Hz). For the measurement, the sample was oscillated normal to the surface and the response of the cantilever resting on the polymer surface (as measured via the photodiode) was monitored. Both oscillation amplitude and phase were recorded as a function of frequency. The AFM measurement gave the same frequency dependence of tan delta as that measured by a dynamic shear rheometer on a film twenty times thicker. The results demonstrate that the AFM technique can quantitatively measure rheological properties of soft thin polymeric films.
Journal of Rheology


AFM, atomic force microscope, loss tangent, polymer rheology, pressure sensitive adhesive, tan delta


McGuiggan, P. and Yarusso, D. (2004), Measurement of the Loss Tangent of a Thin Polymeric Film Using the Atomic Force Microscope, Journal of Rheology, [online], (Accessed June 19, 2024)


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Created January 1, 2004, Updated February 19, 2017