The 1 H-NMR spectra of the ST-PCPP copolymers show a broad double peak in a 6.0-8.0 ppm region corresponding to phenyl ring protons. A resonance at 4.5-3.7 ppm is assigned to the methyleneoxy protons of PCPP monomer unit. A broad resonance at 3.0-2.0 ppm is assigned to the methine protons of PCPP, and methine and methylene protons of ST monomer unit close to the propenoate unit, which are more subjected to deshielding than the ones in polystyrene. A broad resonance peak in 0.8-2.3 ppm range is attributed to the methine and methylene protons of styrene monomer sequences, as well as to alkyl ester protons of PCPP. The 13 C-NMR spectra also support the suggested skeletal structure of the copolymers. Thus, the assignment of the peaks is as follows: 164-162 ppm (C=O), 154-131 ppm (quaternary carbons of both phenyls), 146-122 ppm (phenyl carbons), 117-113 ppm (CN), 62-51 ppm (methine, quaternary carbons and alkoxy PCPP carbons), 48-41 ppm (ST methine), and 43-40 ppm (ST methylene) carbons of PCPP. The IR and NMR data showed that these are true copolymers, composed of both TSE and ST monomer units similarly to reported earlier copolymers .