WAXS is a useful technique to determine d-spacing in intercalated nanocomposites. The WAXS pattern of PLA is characterized by a broad peak approximately at 2h = 15 (Fukushima, Abbate et al., 2009), confirming its amorphous structure. No significant differences were found from the WAXS patterns of all the formulations studied at this angle range, indicating the polymer structure and crystallinity were not influenced by the presence of D43B and/or thymol.