The free radical copolymerization of N-maleyl glycine (MG) with vinylpyrrolidone (NVP) was studied in the range from 10 to 90 mol% in the feed. Copolymer compositions obtained by elemental analysis reflect the monomer feed concentrations, The r(1) and r(2) were determined by the Fineman-Ross and Kelen-Tudos method. The experimental data indicate random comonomer incorporation with slightly alternating tendency. The thermogravimetric analysis of the copolymers showed high thermal stability in N-2.