The copolymer of vinyl imidazole (VI) and vinyl trimethoxy silane (VTS), was synthesized in benzene at 68 degrees C as a novel corrosion inhibitor for copper. The effect of the copolymer composition on copper corrosion protection at elevated temperatures was investigated by Fourier transform infrared reflection, absorption spectroscopy (FTIR-RAS) and scanning electron microscopy (SEM). In addition, an adhesion test was performed to characterize the interface between copper and the polymer film after heat treatment. Corrosion protection capabilities of the copolymer at 360 degrees C in air was improved via increasing the mol ratio of VTS in the feed, due to the improved thermal stability and the reactivity of the copolymer with copper.