Curing, monomer leaching and water sorption of TEGDMA/BisGMA photopolymerized copolymers

Author(s)

Leticia F. A. Pinto ^[1] ; Isabel C. Rigoli ^[1] ; Miguel G. Neumann ^[1] ; Carla C. S. Cavalheiro ^[1]

Affiliation

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

• Document type: Journal article
• Source: Journal of the Brazilian Chemical Society; v. 24, n. 4, p. 595-600, 2013-04-00.

Abstract

The aim of this work was to correlate the degree of conversion with residual monomer release and water absorption of 2,2-bis[4-(2-hydroxy-3-methacryloyloxypropoxy) phenyl]propane (BisGMA) and triethyleneglycol dimethacrylate (TEGDMA) (TB copolymers) obtained by photopolymerization, using canforquinone/ethyl 4-dimethylaminobenzoate (CQ/EDB) photoinitiator. The monomer release from the copolymers was evaluated by immersion in ethanol/water and HPLC (high performance liquid chromatography) analysis. Water absorption from artificial saliva was determined by mass variation. The results show that the composition of the TB copolymers influences the polymerization kinetics, the amount of the released monomers, the degree of conversion and the amount of adsorbed water. A clear correlation can be found between these properties. (AU)

• FAPESP's process: 05/03692-4 - Contributions to the study of the photostability of dyes in polymers
• Grantee: Carla Cristina Schmitt Cavalheiro
• Support Opportunities: Regular Research Grants
• FAPESP's process: 07/08515-9 - Photoinitiated polymerization: elemental reactions and overall
• Grantee: Miguel Guillermo Neumann
• Support Opportunities: Regular Research Grants