Abstract Copolymers of 3-methoxy-4-methacryloyloxybenzal phenylimine and methyl methacrylate were synthesized with different feed ratios in ethyl methyl ketone solution at 70°±1°C using benzoyl peroxide as initiator. The copolymers were characterized by IR and 1 H-NMR spectroscopic techniques. Copolymer compositions were determined by 1 H-NMR analysis. The monomer reactivity ratios were determined by the application of conventional linearization methods such as Fineman–Ross and Kelen–Tudos. Gel permeation chromatography was used for determining the molecular weights ( M n and M w ) and the polydispersity index. Thermogravimetric analysis of the polymers were performed in air. The intrinsic viscosities of polymers were also discussed.