Reconstitution of elastic properties – New insights into the functional behavior of polymer matrix composites

Conference Dates

November 10-14, 2019


Figure 1 – Schematic of the longitudinal elastic modulus as a function of the degree of cure

Using a combination of two complementary experimental techniques, we investigated the visco-elastic properties of thermoplastic polymeric material: poly-vinylidene fluoride (PVDF). We simultaneously measured the quasi-isothermal and adiabatic elastic moduli by setting up a miniature tensile tester on an optical table. While tensile testing (TT) yields the quasi-isothermal Young’s modulus (Fig. 1), the adiabatic shear and longitudinal moduli are derived from Brillouin light scattering (BLS) spectra.1 This two-pronged probing approach yields data, which upon detailed analysis provides for unprecedented insights into the distribution of relaxation times associated with various Maxwell elements, as well as evidence for visco-elastic property changes that require descriptions beyond these simple models.

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