Cationic photopolymerization offers a significant advantage over radical polymerization due to its resistance to oxygen inhibition and superior dimensional stability during crosslinking process. In this study, we aim to advance the development of bio-based monomers for cationic photopolymerization by synthesizing oxetane-functionalized derivatives of adipic, itaconic and citric acids. These three renewable acids were chosen for their multifunctionality and availability. The synthesized monomers, bis((3-methyloxetan-3-yl)methyl) adipate (BOA), bis((3-methyloxetane-3-yl)methyl) itaconate (BOI) and tris((3-methyloxetane-3-yl)methyl) citrate (TOC), were fully characterized using nuclear magnetic resonance (NMR). Fourier transform infrared (FTIR) spectroscopy and photo differential scanning calorimetry (photo-DSC) was employed to monitor the oxetane ring-opening reaction kinetics and to determine the degree of conversion, revealing high reactivity in all monomers, reaching nearly complete conversion within 90 seconds. The mechanical properties of the UV-cured films were assessed by dynamic mechanical thermal analysis (DMTA), and gel content measurements. Results indicated that the BOI-based films exhibited higher glass transition temperatures (Tg), and crosslinking densities compared to BOA- and TOC-based films. The findings demonstrate the potential of bio-based oxetane monomers to produce UV-curable materials with acceptable thermomechanical properties, offering a sustainable alternative to petroleum-derived precursors.