The current research was carried out to characterize the chemical properties of polymeric blends of recycled polymethyl methacrylate-based denture base resin used in dentistry. Polymeric blends of recycled denture base resins (r-PMMA) were fabricated at w/w concentrations of 10%, 20%, 30%, 40% and 50% with commercially available denture base resin. Processed disk-shaped specimens (n = 10) of unmodified commercially available denture base resin were considered as the control group (R[[inf]]0[[/inf]]). Similarly, experimental group specimens were fabricated using 5 polymeric blends (R[[inf]]10[[/inf]], R[[inf]]20,[[/inf]] R[[inf]]30,[[/inf]] R[[inf]]40[[/inf]] and R[[inf]]50[[/inf]]). Representative cuboidal specimens (5 mm × 5 mm × 3 mm) of all 6 groups were fabricated for surface characterization by Field-emission scanning electron microscopy (FESEM) and compositional analysis was carried out using energy dispersive X-ray (EDX). The groups were studied by nuclear magnetic resonance (NMR) spectroscopy. The DC of the polymers (powdered form) was analyzed by Fourier transform infrared spectroscopy. One-way analysis of variance was used to compare the mean values of DC% among the groups followed by post hoc Bonferroni test. Results show that the addition of r-PMMA at the ratios of 10, 20, 30, 40, and 50% increased the weight % of C from 62.79 to 66.06%. The addition of r- PMMA improved the DC and the experimental group R[[inf]]30[[/inf]] showed the highest DC. Findings conclude that the increase of C % can be attributed to the addition of r-PMMA which due to polymerization has enhanced % of C. FTIR spectra revealed that no new compound was formed, eliminating the likelihood of contamination and adulteration due to mechanical recycling. The addition of r-PMMA improved the DC. The addition of r-PMMA improved the chemical properties of the Polymethyl methacrylate denture base acrylic resin could significantly impact the denture quality and durability of life for the denture wearer. © 2025 Centre for Science and Technology of the Non-aligned and Other Developing Countries (NAM S&T Centre).