Premium
Reactivity ratios in group transfer copolymerization of methyl methacrylate/ethyl methacrylate and methacrylonitrile/methyl methacrylate systems obtained by semi‐integral and integral methods
Author(s) -
ÇatalgilGiz Huceste
Publication year - 1996
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.1996.021970904
Subject(s) - methacrylonitrile , methyl methacrylate , reactivity (psychology) , methacrylate , monomer , polymer chemistry , copolymer , chemistry , materials science , polymer , organic chemistry , styrene , alternative medicine , pathology , medicine
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 and 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‐Tüdős method) overestimate the reactivity of the less active monomer.