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Solvent effect on the methacrylic acid‐methyl methacrylate radical copolymerization. Analytical estimation by linear and nonlinear solvation energy relationships
Author(s) -
Georgiev Georgi S.,
Dakova Ivanka G.
Publication year - 1994
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.1994.021950520
Subject(s) - solvatochromism , comonomer , methyl methacrylate , chemistry , methacrylic acid , solvent , polymer chemistry , solvation , monomer , copolymer , acetonitrile , photochemistry , toluene , solvent effects , organic chemistry , polymer
The calculated methacrylic acid‐methyl methacrylate monomer reactivity ratios in toluene ( r MA = 1,06 ± 0,02; r MMA = 0,10 ± 0,01), isopropyl alcohol ( r MA = 0,33 ± 0,02; r MMA = 0,78 ± 0,03), acetone ( 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 polarity, proton donor and proton acceptor ability of the solvent. It is proved that the solvent influence on the logarithm of the relative comonomer reactivities is expressed much better by the linear relationships 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 complex solvent influence on the comonomer reactivities by quadratic solvatochromic relationships taking into account the interdependence of solvent effects is shown for the first time.