An amorphous acrylate interpenetrated polymer network (IPN) was made in lab and tested by dynamic mechanical analysis. Using frequency sweep tests, it was shown that the time-temperature superposition principle applies to the double network. Moreover, a generalized Maxwell model with forty Maxwell branches successfully reproduced the material linear viscoelasticity. Using temperature sweep tests, the IPN linear viscoelasticity has been estimated by micromechanics, applying both mean-field homogenization models and fast Fourier transform (FFT)-based homogenization techniques. This modeling effort allowed discussing the simple network mechanical interactions. The microstructure of a second network, defined by a self-avoiding random walk, embedded in a continuous medium, in place of the first network, is shown to provide with satisfactory estimates of the IPN linear viscoelasticity.