EVALUATION OF PROPAGATION RATE CONSTANTS FOR THE FREE-RADICAL POLYMERIZATION OF METHACRYLONITRILE BY PULSED-LASER PHOTOLYSIS

Authors
SHIPP DA SMITH TA SOLOMON DH MOAD G
Citation
Da. Shipp et al., EVALUATION OF PROPAGATION RATE CONSTANTS FOR THE FREE-RADICAL POLYMERIZATION OF METHACRYLONITRILE BY PULSED-LASER PHOTOLYSIS, Macromolecular rapid communications, 16(11), 1995, pp. 837-844
Citations number
30
Categorie Soggetti
Polymer Sciences
Journal title
Macromolecular rapid communications → ACNP
ISSN journal
10221336
Volume
16
Issue
11
Year of publication
1995
Pages
837 - 844
Database
ISI
SICI code
1022-1336(1995)16:11<837:EOPRCF>2.0.ZU;2-G
Abstract
Propagation rate constants for the free radical polymerization of meth acrylonitrile (MAN) have been obtained by pulsed laser photolysis (PLP ). The temperature dependence of the propagation rate constants indica tes 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 propaga ting species.