Evaluation of two matrix materials intended for fiber-reinforced polymers
| Autor: | Susanna Segerström, Torbjørn Knarvang, Gökçe Meriç, I. Eystein Ruyter |
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| Rok vydání: | 2005 |
| Předmět: |
Materials science
Surface Properties Ethylene glycol dimethacrylate Methylmethacrylate Composite Resins Absorption chemistry.chemical_compound Flexural strength Polymer chemistry Materials Testing Humans Polymethyl Methacrylate Composite material Pliability Polyvinyl Chloride General Dentistry chemistry.chemical_classification Aqueous solution Diethylene glycol Water Polymer Elasticity Monomer Cross-Linking Reagents chemistry Polymerization Solubility Thermomechanical analysis Methacrylates Thermodynamics Polyvinyls Adsorption Stress Mechanical |
| Zdroj: | European journal of oral sciences. 113(5) |
| ISSN: | 0909-8836 |
| Popis: | Two matrix resins for fiber composites that remain in a fluid state during storage and handling before polymerization were evaluated. The resin mixtures, based on methyl methacrylate (MMA), were produced with two different cross-linking agent systems: 1,4-butanediol dimethacrylate and ethylene glycol dimethacrylate or diethylene glycol dimethacrylate. Water sorption, water solubility, water uptake and residual MMA monomer were determined. Thermomechanical analysis was used to determine linear dimensional changes as a function of temperature. Flexural strength and modulus as well as fracture work and the maximum stress intensity factor were determined. The results revealed similar values for both matrix polymers regarding water sorption, water solubility, water uptake, residual MMA monomer (0.5 wt% (+/- 0.03)) and coefficient of linear thermal expansion. Flexural strength for polymer B was 68.7 MPa (+/- 9.8) compared to 56.0 MPa (+/- 13.3) for polymer A when tested dry and 64 MPa (+/- 6.1) compared to (54 MPa (+/- 3.3) when water-saturated. Fracture toughness tests showed higher maximum stress intensity factor values for polymer B (0.75 +/- 0.17) MPa x m1/2 than for polymer A (0.55 +/- 0.12) MPa x m1/2. The resin binders showed an appropriate consistency while remaining in a fluid state during storage and manipulation. |
| Databáze: | OpenAIRE |
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