(a)
(b)
(c)
Figure 3: The mechanical spectra of samples at different HA concentrations and HA/DVS weight ratio: (a) the comparison of the mechanical spectra of samples characterized by [HA] = 5% and 6% and HA/DVS weight ratio of 2.5 : 1; (b) the comparison of the mechanical spectra of samples characterized by [HA] = 5% and 6% and HA/DVS weight ratio of 5 : 1; (c) the comparison of the mechanical spectra of samples characterized by [HA] = 5% and 6% and HA/DVS weight ratio of 8 : 1.