Mechanical Properties and Biodegradability of the Kenaf/Soy Protein Isolate-PVA Biocomposites

Figure 10

SEM photographs of tensile fracture surface of (a) neat SPI/glycerol film, (b) SPI/glycerol film with PVA (5 wt%), (c) SPI/glycerol film with PVA (15 wt%), and (d) SPI/glycerol film with PVA (20 wt%).

(a)

(b)

(c)

(d)