Publication:
Fluorescence monitoring of polymerization reaction. A new method for treating fluorescence experimental data

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Abstract
A new method has been found for monitoring polymerization reactions in situ and in real time. The first moment of fluorescent emission, 〈ν〉=∑IF(ν)ν/∑IF(ν) is calculated from fluorescence spectra as a function of polymerization time and can be successfully correlated with the conversion of functional groups, obtained by an independent technique, with a very low level of experimental scatter. The statistical analysis of the method has been performed; some simple computer experiments allowed to study the influence of the most important experimental variables yielding the confidence interval of 〈ν〉 as a function of the noise to signal ratio. This method was applied with stepwise polyaddition (epoxide curing) and polymerization by free radical mechanisms. 5-Dimethylaminonaphthalene-1-sulfonamide derivatives, 4-dialkylamino-4′-nitrostilbene and pyrene were used as probes and/or labels. Other methods reported in the literature have been applied also. Comparison with them reveals that the first moment method is more reliable for monitoring polyaddition reactions.
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Keywords
Fluorescent probes, Fluorescent labels, Epoxy resins
Bibliographic citation
Mikes, F., González-Benito, J., Serrano, B., Bravo, J., Baselga, J. (2002). Fluorescence monitoring of polymerization reaction. A new method for treating fluorescence experimental data. Polymer, 43 (16), pp. 4331–4339.