Citation: YANG Guoqiang, WU Shikang. A KIND OF FLUORESCENCE PROBE TO STUDY THE KINETICS OF POLYMERIZATION PROCESS*[J]. Chinese Journal of Polymer Science, ;1994, 12(3): 237-245. shu

A KIND OF FLUORESCENCE PROBE TO STUDY THE KINETICS OF POLYMERIZATION PROCESS*

Received Date: 9 April 1993

Fluorescence properties of 1-pheny1-3-(4'-nitrophenyl) pyrazoline (PNP) were studied inbulk polymerization process of methylmethacrylate (MMA). The fluorescence intensity of PNPwas enhanced and the emission maximum was blue shifted with the polymerization progress. Inthe period of auto-acceleration of the polymerization the enhancement of fluorescence intensityand blue shift of peak wavelength in spectra could be observed evidently. This means that thesolvatochromic properties of PNP are influenced not only by the solvent polarity but also by the viscosity of the medium (especially by the phase transition).In solid state PNP emits from the charge transfer excited state without solvent relaxation.The transient emission spectra and the results from Bakhshiev model of solvent relaxation coincide with that from the polymerization experiment.
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