Original scientific paper
Effect of Butadiene Acrylate Cross-Linking on Impact Strength of Poly Methyl Methacrylate
Vjekoslav Jerolimov
; Department of Removable Prosthetics, School of Dentistry, University of Zagreb, Croatia
R. G. Jagger
; Department of Prosthetic Dentistry, Dental School, University of Wales College of Medicine, Cardiff, Wales
R. Huggett
; Department of Prosthetic Dentistry and Dental Care of the Elderly, Dental School, University of Bristol, England
Abstract
A cross-linking agent, ethylene glycol dimethacrylate, which is added to poly (methyl methacrylate) (VMMA) denture base resins to improve crazing resistance, has little effect on the mechanical properties o f the resultant denture base. A poly functional cross-linking agent, butadiene acrylate (BDA), has been considered to have a greater cross-linking efficiency and thus altering the mechanical properties. The purpose o f this study was to investigate the effect o f BDA on the impact strength o f a PMMA specimens containing 0%, 1%, 4% and 12% BDA o f monomer volume which had been produced by a conventional dental dough-moulded technique as determined. Mean impact strengths were 1.789 KJ/m2 (SD 0.254), 1.720 KJ/m2 (SD 0.273); 1.715 KJ/m2 (SD 0.280) and 1.838 KJ/m2 (SD 0.244), respectively. These differences were not significant (p >0.05) as tested by the analysis o f variance. It was concluded that the cross-linking agent BDA did not affect the impact strength of the PMMA resin specimens.
Keywords
poly (methyl methacrylate); cross-linking; butadiene acrylate; impact strength
Hrčak ID:
99776
URI
Publication date:
15.3.1993.
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