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Determination of reaction activation energy during gelation in free radical crosslinking copolymerization using the steady‐state fluorescence method
Author(s) -
Pekcan Ö.,
Yilmaz Y.,
Okay O.
Publication year - 1996
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(19960926)61:13<2279::aid-app6>3.0.co;2-9
Subject(s) - ethylene glycol dimethacrylate , gel point , activation energy , polymerization , copolymer , fluorescence , methyl methacrylate , pyrene , radical polymerization , materials science , ethylene glycol , polymer chemistry , bulk polymerization , chemistry , polymer , organic chemistry , methacrylic acid , physics , quantum mechanics , composite material
The steady‐state fluorescence technique was used to study the sol‐gel transition in free radical crosslinking copolymerization of methyl methacrylate and ethylene glycol dimethacrylate (EGDM). Pyrene methyl pivalate was used as a fluorescence probe for the in situ polymerization experiments. The times required for the onset of gelation t c and the critical exponent β were recorded for various EGDM contents and at different polymerization temperatures. A simple kinetic model was used to interpret the experimental gel point data. The results show that the fluorescence technique can be used to measure the critical exponent β, the gel point t c , and the activation energy during sol‐gel phase transition processes. © 1996 John Wiley & Sons, Inc.