Fig. 4

Effect of frequency (0.5, 1, 2 Hz) on stress–strain curves (a) and on hysteresis (b). Effect of strain rate (0.5, 5, 10%) on stress–strain curves (c) (loading curve shown) (n = 1) and on Young’s modulus (d) for different curing temperatures (n = 5) (Two-way ANOVA, significant effect of curing temperature (***p < 0.0001), significant differences between temperatures, no differences between strain rates). Stress–strain curve highlighting the five different strain ranges considered (e) (n = 1, 80 °C). Effect of strain range on Young’s modulus (f) for different curing temperatures, strain rates averaged (n = 3) (Two-way ANOVA, significant effect of strain range (***p < 0.0001) and curing temperature (***p < 0.0001), significant differences between all temperatures)