Radical copolymerization at 50 degrees C of 2-hydroxyethyl methacrylate and tert-butyl acrylate in a 3 mol l(-1) N,N'-dimethylformamide (DMF) solution has been analysed over a wide range of conversion and monomer feed compositions with the purpose of predicting the variation of inter and intramolecular structures. To do this, the previously obtained monomer reactivity ratios along with the coisotactic and statistical parameters were used. Overall copolymerization rate coefficients and individual monomer conversions for each monomer on the full range of conversion were also obtained. From the results obtained it follows that the Mayo-Lewis terminal model (MLTM) provides an excellent prediction across the complete conversion range for all comonomer feed compositions.