Premium
Evaluation of propagation rate constants for the free radical polymerization of methacrylonitrile by pulsed laser photolysis
Author(s) -
Shipp Devon A.,
Smith Trevor A.,
Solomon David H.,
Moad Graeme
Publication year - 1995
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.1995.030161109
Subject(s) - methacrylonitrile , polymerization , reaction rate constant , photodissociation , photochemistry , monomer , methyl methacrylate , radical polymerization , materials science , steric factor , photopolymer , polymer chemistry , styrene , chemistry , kinetics , steric effects , polymer , copolymer , organic chemistry , physics , quantum mechanics
Propagation rate constants for the free radical polymerization of methacrylonitrile (MAN) have been obtained by pulsed laser photolysis (PLP). The temperature dependence of the propagation rate constants indicates a frequency factor of 10 (6,43 ± 0,26) L · mol −1 · s −1 and an activation energy of 29,7 ± 1,5 kJ · mol −1 . These parameters suggest that the relatively slow rate of propagation in MAN polymerization in relation to other common monomers (methyl methacrylate, styrene) can be attributed to the relative steric bulk and stability of the propagation species.