Abstract:In this study, the mixtures of N-hydroxymethyl acrylamide (HMAm) monomer and Na-Montmorillonite (Na-Mt) were polymerized in different ratios in the presence of benzoyl peroxide (Bz2O2) with in-situ radical polymerization to prepare poly(Nhydroxymethyl acrylamide) (PHMAm)/Na-Mt composites. Purified Na-Mt, and newly prepared composites were characterized with Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), and thermal analysis (TGA/DTA) techniques. The moisture retention, water uptake, adsorptive properties of the composites was also searched. The XRD patterns demonstrated that the PHMAm matrix intercalated into Na-Mt layers. The PHMAm/Na-Mt composites had much better thermal stability than the pure PHMAm.