POLYSTYRENE NANOCOMPOSITE MATERIALS BY IN SITU POLYMERIZATION INTO ZN AL LAYER DOUBLE HYDROXIDE STEARATE HEXADECANE STYRENE MONOMER INTERLAYER

摘要

Zn-Al Layered Double Hydroxides (LDHs) containing nitrate as the interlayer anion was prepared by coprecipitation. The resulting suspension was treated with deprotonated stearic acid (octadecanoic acid) to give an organo-modified hydrotalcite compound (Zn-Al LDH-Stearate). The prepared LDH-stearate was successfully delaminated in hexadecane, resulting in a Zn-Al LDH stearate/hexadecane. In situ intercalative polymerization of styrene with the delaminated LDH (with different ratios) resulted in the formation of partially exfoliated polystyrene-based LDH-stearate/hexadecane. nanocomposites (polymer/clay nanocomposites). The delaminated LDH nanosheets, before and after introduction into the polystyrene matrix were confirmed by elemental analysis, Atomic Absorption Spectroscopy (AAS), X-ray Diffraction Spectroscopy (XRD), and Thermogravimetric Analysis (TGA). X-ray diffraction confirmed exfoliation of the LDH through the disappearance of the basal (003) reflection.