Measuring Nanoscale Viscoelastic Properties with AFM-Based nano-DMA

Learn New Ways of Measuring Viscoelasticity with AFM

In this webinar, Measuring Nanoscale Viscoelastic Properties with AFM-Based nano-DMA, the speakers introduce the polymer rheological measurement capabilities of the new AFM-nDMA mode. This mode for the first time provides viscoelastic measurements that match bulk dynamic mechanical analysis (DMA) over the entire frequency range.

Watch to learn how AFM-nDMA mode overcomes the analytical challenges of established AFM methods in order to:

• Provide viscoelastic results that can be directly compared with bulk DMA; and also
• Allow high-resolution microstructure measurements of heterogeneous samples.

To illustrate these points, the speakers discuss a series of homogeneous polymer and composite examples.

Since the mechanical properties of polymers are time dependent, full understanding of their characteristics requires collecting measurements over a range of frequencies and temperatures.

Where DMA is well suited for measurements on bulk samples, it is less adept at characterizing microscopic domains within heterogeneous polymer material. Established AFM methods have similarly limited appropriateness for use in such research processes, as they either provide property maps at discrete frequencies orders of magnitude higher than bulk measurements (e.g., TappingMode and contact resonance) — making comparisons difficult — or struggle with such intrinsic mechanical properties as loss tangent and storage modulus (e.g., force spectroscopy and PeakForce Tapping).

 AFM-nDMA overcomes these hurdles.

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This webinar was presented on: March 20, 2019