✦ LIBER ✦

Fluorescence technique for studying the sol-gel transition in the free-radical crosslinking copolymerization of methyl methacrylate and ethylene glycol dimethacrylate

✍ Scribed by Ö. Pekcan; Y. Yilmaz; O. Okay

Publisher: Elsevier Science
Year: 1994
Tongue: English
Weight: 352 KB
Volume: 229
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(94)01112-5

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✦ Synopsis

The steady-state fluorescence technique was used to study the free-radical crosslinking copolymerization of methyl methacrylate and ethylene glycol dimethacrylate in the absence and presence of toluene at 75°C. A sol-gel phase transition was observed and monitored by an excited 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.

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