The composition and the microstructures of the copolymer of 2-vinylpyridine (V) -- methyl methacrylate(M) initiated with free radical have been quantitatively studied by 250 MHZ ^1H NMR spectra. V-centred triad and M-centred triad distributions were quantitatively measured. It is confirmed from the above results that this copolymerization system belongs to the first order Markov chain model. The corresponding reactivity ratios established are γv=0.64, γM=0.31, respectively, agreeing very well with those calculated theoretically.

Key words: PYRIDINE P, METHYLMETHACRYLATE, VINYL POLYMER, COPOLYMERS, PROTON MAGNETIC RESONANCE SPECTROMETRY