Hybrid Composites from Wheat Straw, Inorganic Filler, and Recycled Polypropylene: Morphology and Mechanical and Thermal Expansion Performance

Figure 1

Morphology of fractured surfaces of composites with WS and combined fillers at 50% loading level. First chart, (a) and (b) 50% WS; and other three charts, 25% WS and 25% inorganic filler: (c) and (d) heavy calcium carbonate, (e) and (f) silicon dioxide, and (g) and (h) fly ash.

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)