Abstract
ABSTRACTA series of polyacrylamide (PAM) organoclay nanocomposites were synthesized by in-situ intercalative polymerization using acrylic amide, sodium hydrogen sulfite, and ammonium peroxydisulfate in the presence of various contents of metakaolinite (MK) modified with potassium acetate (KAc). Both x-ray diffraction data and atomic force microscopy images of PAM/MK nanocomposites indicate that the MK was homogeneously dispersed on the nanoscale into the polymer matrix. Infrared and Raman spectroscopy indicated the formation of hydrogen-bonding interactions between PAM and MK and the distortion of the Si–O tetrahedron and Al–O polyhedron in the polymerization process. In addition, DSC results revealed that when the nanocomposites with MK modified with KAc were less than 10%, they have higher decomposition temperature and better thermal stability in comparison with the pure PAM.
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