3.5 Effect of master curve parameters on the interphase thickness estimation As mentioned in section 3.2, the contribution of the substrate effect on the relative modulus (E/EFF) is described by a power-law function of distance, which we assumed to be the "master curve" obtained by FEA. However, as discussed above, the exact fitting parameters of the master curve remain somewhat uncertain, so here we analyze the sensitivity of the estimation of the interphase thickness to the master curve fitting parameters. To this end, we compared the λpred and E0 obtained by using different fitting parameters of the master curve to obtain (E/EFF-EMC).