Reactivity ratios in group transfer copolymerization of methyl methacrylate/ethyl methacrylate and methacrylonitrile/methyl methacrylate systems obtained by semi-integral and integral methods


CatalgilGiz H. H.

MACROMOLECULAR CHEMISTRY AND PHYSICS, cilt.197, ss.2647-2651, 1996 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 197 Konu: 9
  • Basım Tarihi: 1996
  • Doi Numarası: 10.1002/macp.1996.021970904
  • Dergi Adı: MACROMOLECULAR CHEMISTRY AND PHYSICS
  • Sayfa Sayıları: ss.2647-2651

Özet

The monomer reactivity ratios for the methyl methacrylate/ethyl methacrylate (MMA/EMA) and methacrylonitrile/methyl methacrylate (MAN/MMA) systems are calculated by linearized semi-integral and nonlinear fully integral methods. For the MMA/EMA system, r(MMA) values obtained by various methods are between 1.24 and 1.25 and r(EMA) values between 0.30 and 0.34. For MAN/MMA system, r(MAN) values are between 3.2 and 3.8 acid for r(MMA) an upper bound can be determined, i.e., r(MMA)<0.05. The results show that previous values obtained by the linearized method (the initial Kelen-Tudos method) overestimate the reactivity of the less active monomer.