Abstract

Onanong Cheerarot and Yodthong Baimark

DOI : http://dx.doi.org/10.13005/ojc/340604

The stereocomplex polylactides (scPLAs) of the asymmetric poly(L-lactide)(PLLA)/poly(D-lactide) (PDLA) ratios from 80:20 to 60:40 were prepared via the simple melt blending method using an internal mixer at 200°C. An organo-modified clay, Cloisite^® 30B, was used for nanocomposite preparation. The formation of the stereocomplex and nanocomposite structures were confirmed by differential scanning calorimetry (DSC), wide-angle X-ray diffraction (WAXD) and transmission electron microscopy (TEM). An increase in the PDLA content could enhance the stereocomplex formation. The presence of Cloisite^®30B decreased the melting temperature and crystallinity of the blends. This was due to the thinner crystalline size generated and/or more disordered crystals.

Blends; Clay; Enantiomer; Polylactide; Stereocomplex

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