the formation of an amorphous structure (Fig. 2a). The X-ray
diffraction pattern of the chitin based PU bentonite clay nanocomposite
showed that the addition of 1.0 mass % of bentonite clay did
not affect the crystallographic nature of PU (Fig. 2b). Comparing
Fig. 2a with Fig. 2b, clearly shows that the sample PUBNC-2 with
nanoclay contents (Fig. 2b) did not shows significant change in
the crystalline pattern in comparison with that of sample PUBNC-
1 without nanoclay (Fig. 2a).