M. Michalovic et al., Polymerization of alpha-(N-vinylformamidomethyl)acrylates: cyclopolymers from non-symmetric monomers, DES MON POL, 2(3), 1999, pp. 199-208
t-Butyl alpha-(N-vinylformamidomethyl)acrylate (tBVFA) and ethyl alpha-(N-v
inylformamidomethyl)acrylate (EVFA) were synthesized from t-butyl alpha-bro
momethylacrylate and ethyl alpha-chloromethylacrylate, respectively. tBVFA
was found to cyclopolymerize at 120 degrees C in DME DMSO, and 1,2-dichloro
benzene at solvent: monomer ratios of 10 : 1 vol. wt. Molecular weights for
poly(tBVFA) ranged from 10 000 to 13 000 as estimated by size-exclusion ch
romatography. At lower solvent monomer ratio (1:1), and at lower temperatur
e (71 degrees C), crosslinking occurred. EVFA was found to cyclopolymerize,
but only in DMF at 122 degrees C and at a 10: 1 solvent:monomer ratio.