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Modeling of swelling by fluorescence technique in poly (methyl methacrylate) gels
Author(s) -
Pekcan Ö.,
Yilmaz Y.
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(19970328)63:13<1777::aid-app10>3.0.co;2-w
Subject(s) - swelling , toluene , ethylene glycol dimethacrylate , desorption , materials science , methyl methacrylate , copolymer , pyrene , polymer chemistry , fluorescence , diffusion , methacrylate , polymer , analytical chemistry (journal) , chemistry , chromatography , composite material , organic chemistry , adsorption , methacrylic acid , physics , quantum mechanics , thermodynamics
A novel technique based on in‐situ steady‐state fluorescence (SSF) measurements is introduced for studying swelling processes in gels formed by free radical cross‐linking copolymerization (FCC) of methyl methacrylate (MMA) and ethylene glycol dimethacrylate (EGDM) in toluene. Gels were prepared at 75°C for various toluene contents with pyrene (Py) as a fluorescence probe. After drying these gels, swelling and desorption experiments were performed in toluene at 50°C by real‐time monitoring of Py fluorescence intensity. A correction method was developed to obtain pure swelling curves, by using desorption curves of Py molecules. Li‐Tanaka equation was employed to produce swelling parameters. Cooperative diffusion coefficients ( D c ) were measured and found to be around 10 −6 cm 2 /s for gels swollen in toluene. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 63: 1777–1784, 1997