SOLVENT EFFECT ON THE METHACRYLIC ACID-METHYL METHACRYLATE RADICAL COPOLYMERIZATION - ANALYTICAL ESTIMATION BY LINEAR AND NONLINEAR SOLVATION ENERGY RELATIONSHIPS

The calculated methacrylic acid-methyl methacrylate monomer reactivity ratios in toluene (r(MA) = 1,06 +/- 0,02; r(MMA) = 0,10 +/- 0,01), is opropyl alcohol (r(MA) = 0,33 +/- 0,02; r(MMA) = 0,78 +/- 0,03), aceto ne (r(MA) = 0,63 +/- 0,02; r(MMA) = 0,31 +/- 0,02) and acetonitrile (r (MA) = 0,46 +/- 0,03; r(MMA) = 0,27 +/- 0,03) depend strongly on the p olarity, proton donor and proton acceptor ability of the solvent. It i s proved that the solvent influence on the logarithm of the relative c omonomer reactivities is expressed much better by the linear relations hips of the solvatochromic polarity, proton donor and proton acceptor indexes than by the dependences reflecting these effects individually. The possibility of a statistically confident description of the compl ex solvent influence on the comonomer reactivities by quadratic solvat ochromic relationships taking into account the interdependence of solv ent effects is shown for the first time.