Dielectric relaxation mechanisms in polyoxymethylene/polyurethane/layered silicates hybrid nanocomposites

•POM/PU/LS nanocomposites produced by Direct Melt (DM) compounding.•POM/PU/LS nanocomposites produced by latex-mediated Masterbatch (MB) technique.•Better dispersion of LS is achieved in the case of the MB produced nanocomposites.•Dielectric relaxations of PU (α & γ) are not affected by the preparation technique.•γ- & δ-relaxations of POM appear as two distinct peaks (DM) or as one broad (MB).