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Influence of the Base and Diluent Monomer on Network Characteristics and Mechanical Properties of Neat Resin and Composite Materials

Influence of the Base and Diluent Monomer on Network Characteristics and Mechanical Properties of Neat Resin and Composite Materials

Nívea Regina de Godoy Fróes-Salgado, Vinícius Gajewski, Bárbara Pick Ornaghi, Carmem Silvia Costa Pfeifer, Marcia Margarete Meier, Tathy Aparecida Xavier, Roberto Ruggiero Braga

Odontology. 2015 May;103(2):160-8.

PMID: 24728606

Abstract:

This study evaluated the effect of the combination of two dimethacrylate-based monomers [bisphenol A diglycidyl dimethacrylate (BisGMA) or bisphenol A ethoxylated dimethacrylate (BisEMA)] with diluents either derived from ethylene glycol dimethacrylate (ethylene glycol dimethacrylate, diethylene glycol dimethacrylate, triethylene glycol dimethacrylate, tetraethylene glycol dimethacrylate) or 1,10-decanediol dimethacrylate (D3MA) on network characteristics and mechanical properties of neat resin and composite materials. The degree of conversion, maximum rate of polymerization and water sorption/solubility of unfilled resins and the flexural strength and microhardness of composites (after 24 h storage in water and 3 months storage in a 75 vol% ethanol aqueous solution) were evaluated. Data were analyzed with two-way ANOVA and Tukey's test (α = 0.05). The higher conversion and lower water sorption presented by BisEMA co-polymers resulted in greater resistance to degradation in ethanol compared with BisGMA-based materials. In general, conversion and mechanical properties were optimized with the use of long-chain dimethacrylate derivatives of ethylene glycol. D3MA rendered more hydrophobic materials, but with relatively low conversion and mechanical properties.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP109171	Tetraethylene glycol dimethacrylate		109-17-1	Price

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