Figure 24.

The shear modulus of viscoelastic media depends on frequency. The plot shows a typical rheological spectrum of a solution of a long-chain linear polymer. The frequency scale extends over many decades, while the QCM only covers about one decade. In this limited frequency range, $G^{\prime }\left(\mathsf{\omega }\right)$ and $G^{″}(\mathsf{\omega }$) can be approximated by power laws (dashed blue lines). The chosen example displays what is called the rubber plateau. Would the frequency scale extend further to the right, there would be a second maximum in $G^{″}(\mathsf{\omega }$), caused by segmental relaxations and the glass transition.