Relaxation models applied to modulated force thermomechanometry of a silica filled flexible polymer

Relaxation of silica-poly(ethylene-co-methyl acrylate) composites was measured using modulated force thermomechanometry. Isothermal frequency dependant storage and loss modulus data were described using Debye, Cole-Cole, Cole-Davidson, and Havriliak-Negami models. Terminal and plateau responses were predicted by the Havriliak-Negami model. Superposition of frequency-modulus data at a series of temperatures was performed using the Williams-Landel-Ferry principle to provide data extending into the terminal and plateau frequency regions.