Synthesis and characterization of exfoliated polystyrene/ZnAl layered double hydroxide nanocomposite via emulsion polymerization

摘要

Exfoliated polystyrene (PS)/ZnAl layered double hydroxide (LDH) nanocomposites have been synthesized via emulsion polymerization in the presence of N-lauroyl-glutamate surfactants and long-chain n-hexadecane.The samples were characterized using elemental analysis,Fourier transform infrared (FTIR) spectrum,X-ray diffraction (XRD),transmission electron microscopy (TEM),and thermogravimetric analysis (TGA).The XRD and TEM results demonstrate that the exfoliated ZnAl-LDH layers of 50-70 nm width and about 1 nm thickness were well dispersed at molecular level in the PS matrix.And the completely exfoliated PS/LDH nanocomposites can be obtained even at the 10 wt% LDH loading.When the 50% weight loss was selected as a comparison point,the decomposition temperature of exfoliated PS/LDH sample with 5 wt% LDH was ca.28 deg C higher than that of pure PS.