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Polymerization of methyl methacrylate by charge‐transfer mechanism with 2,2′‐bipyridine and iron (III) complex
Author(s) -
Baruah Shashi D.,
Goswami Aradhana
Publication year - 1997
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/(sici)1097-4628(19970613)64:11<2097::aid-app5>3.0.co;2-e
Subject(s) - polymerization , polymer chemistry , methyl methacrylate , chemistry , differential scanning calorimetry , cationic polymerization , polymer , organic chemistry , physics , thermodynamics
Polymerization of methyl methacrylate (MMA) by the charge‐transfer complex formed by the interaction of 2,2′‐bipyridine (bpy), MMA, and carbon tetrachloride (CCl 4 ) was studied in dimethylsulfoxide (DMSO) at 60°C. The rate of polymerization (R p ) is sensitive to the [CCl 4 ] at low concentration of CCl 4 , but at a higher concentration it is practically independent of [CCl 4 ]. R p is proportional to [MMA] 1.45±0.04 and [bpy] 0.52±0.04 when [CCl 4 ] > [bpy], and the average rate constant, k, at 60°C for the polymerization of MMA was 7.14 ± 0.40 × 10 −6 L mol −1 s −1 . Kinetic studies showed that the polymerization proceeds through free radical intermediates. This article also reports the polymerization of MMA initiated by bpy and CCl 4 and accelerated by Lewis acid, hexakis (dimethylsulfoxide)iron(III) perchlorate [Fe(DMSO) 6 ](ClO 4 ) 3 at 60°C. The glass transition temperature and molecular weights of the samples were investigated by using differential scanning calorimetry and gel permeation chromatography techniques, respectively. Probable reaction mechanisms are proposed to explain the observed results. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 64: 2097–2103, 1997