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p ‐Acetylbenzylidene triphenylarsonium ylide initiated radical polymerization of methyl acrylate
Author(s) -
Tiwari S. P.,
Gehlot C. L.,
Srivastava A. K.
Publication year - 2008
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.27733
Subject(s) - ylide , polymerization , polymer chemistry , radical polymerization , methyl acrylate , chain transfer , kinetics , chemistry , acrylate , solution polymerization , polymer , materials science , copolymer , medicinal chemistry , organic chemistry , physics , quantum mechanics
Polymerization of methyl acrylate (MA), initiated by p ‐acetyl benzylidene triphenylarsonium ylide ( p ‐ABTAY) in dioxan at (60 ± 1)°C for 1 h, follows nonideal kinetics ( R p ∝ [I] 0.21 [M] 1.40 ) due to primary radical termination as well as degradative chain transfer reaction. The polymerization proceeded upto 20.49% conversion without gelation and results in the polymer of high molecular weight 98,000. The overall activation energy and the value of k p 2 / k t are 14 kJ mol –1 and 18.75 × 10 –6 L mol –1 s –1 , respectively. The ylide dissociates to form phenyl radical, which initiates the polymerization of MA. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008