(a) Curing time 6 h; density of 1.4 g/cm3
(b) Curing time 12 h; density of 1.4 g/cm3
(c) Curing time 24 h; density of 1.4 g/cm3
(d) Curing time 48 h; density of 1.4 g/cm3
(e) Curing time 72 h; density of 1.4 g/cm3
Figure 4: The axial stress-strain curves of samples with different PSS concentration and curing time.