Monitoring of visible light photopolymerization of an epoxy/ dimethacrylate hybrid system by Raman and near-infrared spectroscopies

Article

Authorship

Asmussen, Silvana Valeria ; SCHROEDER, WALTER FABIAN ; DELL'ERBA, IGNACIO ESTEBAN ; Vallo, Claudia Ines

Date

2013

Publishing House and Editing Place

Elsevier

Magazine

POLYMER TESTING, vol. 32 (pp. 1283-1289) Elsevier

Summary Information provided by the agent in SIGEVA

Hybrid systems formulated with epoxy and methacrylate monomers at mass fraction either 50:50 or 75:25 were studied. The individual monomer conversions during photopolymerization with visible light were monitored by Raman and near-infrared spectroscopies. The rate of polymerization and final degree of conversion of the methacrylate groups were raised when the epoxy monomer was present. This is attributed to enhancement of the mobility of the reactive species caused by the presence of the epoxy m... Hybrid systems formulated with epoxy and methacrylate monomers at mass fraction either 50:50 or 75:25 were studied. The individual monomer conversions during photopolymerization with visible light were monitored by Raman and near-infrared spectroscopies. The rate of polymerization and final degree of conversion of the methacrylate groups were raised when the epoxy monomer was present. This is attributed to enhancement of the mobility of the reactive species caused by the presence of the epoxy monomer. Conversely, the earlier vitrification of the system due to the faster polymerizing methacrylate network resulted in reduced conversion of epoxy rings.