Experimental Determination of \beta and \gamma Critical Exponents in the Sol-gel Phase Transition by Using Steady-state Fluorescence Technique

Authors: Y. YILMAZ, Ö. PEKCAN

Abstract: The gelation of methyl methacrylate and ethylene glycol dimethacrylate was studied using the steady-state fluorescence technique. Samples with various crosslinker densities were prepared and sol-gel phase transitions were observed at various temperatures. Percolation theory was employed to interpret the results. For all samples the gel fraction and the average cluster size exponents, \beta and \gamma, were measured and found to be around 0.42 and 1.7 respectively. These values show excellent agreement with theoretical and simulation results.

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