I. Sideridoukarayannidou et G. Seretoudi, SOLVENT EFFECT ON THE FREE-RADICAL COPOLYMERIZATION OF N-VINYLCARBAZOLE WITH N,N-DIMETHYLAMINOETHYL METHACRYLATE, Polymer, 38(16), 1997, pp. 4223-4228
The reactivity ratios of N-vinylcarbazole (r(1)) and N,N-dimethylamino
ethyl methacrylate (r(2)) were determined at 60 degrees C in toluene,
dioxane, methylethyl ketone and N,N-dimethylformamide (DMF) solutions.
The values calculated by the extended Kelen-Tudos method were r(1) =
0.44 +/- 0.05, r(2) = 1.63 +/- 0.10 (in toluene), r(1) = 0.32 +/- 0.05
, r(2) = 1.34 +/- 0.10 (in dioxane), r(1) = 0.15 +/- 0.03, r(2) = 1.10
+/- 0.07 (in methylethyl ketone) and r(1) = 0.10 +/- 0.02, r(2) = 0.8
8 +/- 0.04 (in DMF). There is a marked effect of solvent on both r(1)
and r(2) in all these systems, which is most probably due to changes i
n the dielectric constant of the solvents used. (C) 1997 Elsevier Scie
nce Ltd.