FLUORESCENCE TECHNIQUE FOR STUDYING THE SOL-GEL TRANSITION IN THE FREE-RADICAL CROSS-LINKING COPOLYMERIZATION OF METHYL-METHACRYLATE AND ETHYLENE-GLYCOL DIMETHACRYLATE
O. Pekcan et al., FLUORESCENCE TECHNIQUE FOR STUDYING THE SOL-GEL TRANSITION IN THE FREE-RADICAL CROSS-LINKING COPOLYMERIZATION OF METHYL-METHACRYLATE AND ETHYLENE-GLYCOL DIMETHACRYLATE, Chemical physics letters, 229(4-5), 1994, pp. 537-540
The steady-state fluorescence technique was used to study the free-rad
ical crosslinking copolymerization of methyl methacrylate and ethylene
glycol dimethacrylate in the absence and presence of toluene at 75 de
grees C. A sol-gel phase transition was observed and monitored by an e
xcited aromatic molecule during the gelation of the above system. Bond
percolation theory was employed to quantify the results. The critical
exponent and gel point were found to be around 0.45 and 0.36 both in
bulk and solution polymerization.