Figure 4: Variations of shift factors with temperature and NP loading.
Temperature dependence of the frequency-scale shift factor aT used to build the viscoelastic master curves in Fig. 3a for the neat P2VP 554 kg mol−1 matrix and its associated nanocomposites. Solid lines are WLF fits to the data, except for the 31 vol% data, which is fit to an Arrhenius equation; fit parameters are provided in Supplementary Table 1. Inset: NPs volume fraction dependence of the glass transition temperature Tg and Vogel temperature T∞ for the same samples. T∞ has been extracted from fitting the data of the main figure with the Vogel–Fulcher–Tammann equation (see Supplementary Table 1).
