The effect of using mixed initiator systems on the efficiency of photopolymerization of dental resins

Author(s)

Neumann, Miguel G. ^[1] ; Schmitt, Carla C. ^[1] ; Correa, Ivo C. ^[2] ; Goi, Beatriz E. ^[1]

Affiliation

^[1] Univ Sao Paulo, Inst Quim Sao Carlos, BR-13560970 Sao Carlos, SP - Brazil

^[2] Univ Fed Rio de Janeiro, Fac Odontol, Rio De Janeiro - Brazil

• Document type: Journal article
• Source: Journal of the Brazilian Chemical Society; v. 19, n. 7, p. 1413-1417, 2008.
• Web of Science Citations: 5

Abstract

A study was performed in order to determine the efficiency of the simultaneous use of the photoinitiators phenylpropanedione (PPD) and camphorquinone (CQ) in the polymerization of acrylic polymers and evaluate possible mechanisms leading to synergism or antagonism. It was found that efficiencies of both initiators taken individually are higher than that of their mixture, indicating that when both dyes are used simultaneously there will be an energy transfer from the more efficient initiator (CQ) to the less efficient one (PPD). Also, there was no proof of any reaction between the amine present in the CQ formulation and the PPD excited state. (AU)

• FAPESP's process: 03/07770-4 - Interactions of visible light with polymers: photopolymerization and photodegradation
• Grantee: Miguel Guillermo Neumann
• Support Opportunities: Research Projects - Thematic Grants