Fig. 4. Influence of microfragments on the mechanical properties of DNGHs. (a) Stress–strain curves of TDNGHs fabricated from PNIPAM microfragments that are homogeneous (grey) and contain small (orange) and large micropores (blue). PAM is used as a 2nd network. (b) Work of fracture ( grey) and Young's Modulus ( orange) of TDNGHs made of microfragments that are homogeneous and contain small and large micropores (n = 3). (c) Young's moduli of TDNGHs measured at 22 °C ( grey) and 60 °C ( orange) (n = 3).