Properties of Biobased Rigid Polyurethane Foams Reinforced with Fillers: Microspheres and Nanoclay

Figure 4

Scanning electron micrographs of SBO PU foams modified with nanoclay.

(a) Nanoclay

(b) SBO PU foam without fillers

(c) SBO PU foam with 1% nanoclay

(d) SBO PU foam with 3% nanoclay

(e) SBO PU foam with 5% nanoclay

(f) SBO PU foam with 7% nanoclay