The study focuses on enhancing the elasticity and strength of polyurethane using polyrotaxanes with a sliding-ring effect. Polyrotaxanes were employed to harness the host-guest interaction capability inherent in cyclodextrins for the encapsulation of poly(propylene) glycol, followed by end-capping using DMT-MM and N-(triphenylmethyl) glycine. The resulting polyrotaxane was them methylated by reacting with CH3I to adjust the hydroxyl group, and the resulting methylated polyrotaxane was used as a chain extender in the synthesis of polyurethane. The polyurethane thus produced allows for the sliding of crosslinking points, due to the presence of slidable methyl-beta cyclodextrin within the polyrotaxane. The synthesized polyrotaxane and its methylated one as well as slidable polyurethane methylated polyrotaxanes were characterized for their structural properties using FT-IR, 1H-NMR, and XRD, while their thermal properties were determined through DSC. The elongation and tensile strength of the polyurethane were assessed using UTM.