Figure 7

Scanning electron micrographs of PVA:S:CMC degradable films in 72 h of enzymatic degradation due to the action of <alpha>−amylase: (a) PVA:S:CMC undegraded; (b) PVA:S:CMC degraded; (c) PVA:S:CMC with 1 wt% MMT undegraded; (d) PVA:S:CMC with 1 wt% MMT degraded; (e) PVA:S:CMC with 3 wt% MMT undegraded; (f) PVA:S:CMC with 3 wt% MMT degraded;(g) PVA:S:CMC with 5 wt% MMT undegraded; (h) PVA:S:CMC with 5 wt% MMT degraded.