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Copolymerization of methyl acrylate with styrene using triphenylstibonium 1,2,3,4‐tetraphenylcyclopentadienylide as a novel radical initiator
Author(s) -
Mohan Upasana,
Varshney Anuradha
Publication year - 2006
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.25039
Subject(s) - copolymer , styrene , reactivity (psychology) , polymer chemistry , methyl acrylate , kinetics , acrylate , activation energy , ylide , butyl acrylate , chemistry , materials science , medicinal chemistry , organic chemistry , polymer , physics , medicine , alternative medicine , pathology , quantum mechanics
The free‐radical copolymerization of methyl acrylate with styrene initiated by triphenylstibonium 1,2,3,4‐tetraphenylcyclopentadienylide under nitrogen blanket at (60 ± 0.1)°C in 1,4,dioxane for 2 h has been carried out. The kinetic expression is R p ∝ [I] 0.14 [MA] 0.70 [Sty] 0.75 . The system follows nonideal kinetics due to primary radical termination as well as degradative chain transfer reactions. The overall activation energy is 42 kJ mol −1 . The reactivity ratios calculated from Kelen–Tüdos method for r 1 (MA) and r 2 (Sty) are 0.16 ± 0.01 and 0.028 ± 0.005 respectively. These values suggest the alternating nature of the copolymer. The ylide dissociated to form a phenyl radical, which brings about copolymerization of methyl acrylate with styrene. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 103: 1731–1736, 2007