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Type: Artigo de periódico
Title: Impact and Fracture Resistance of an Experimental Acrylic Polymer with Elastomer in Different Proportions
Author: Pires-de-Souza, FDP
Panzeri, H
Vieira, MA
Garcia, LDR
Consani, S
Abstract: The purpose of this study was to evaluate the impact and fracture resistance of acrylic resins: a heat-polymerized resin, a high-impact resin and an experimental polymethyl methacrylate with elastomer in different proportions (10, 20, 40 and 60%). 120 specimens were fabricated and submitted to conventional heat-polymerization. For impact test, a Charpy-type impact tester was used. Fracture resistance was assessed with a 3-point bending test by using a mechanical testing machine. Ten specimens were used for each test. Fracture (MPa) and impact resistance values (J.m(-1)) were submitted to ANOVA - Bonferroni's test - 5% significance level. Materials with higher amount of elastomer had statistically significant differences regarding to impact resistance (p < 0.05). Fracture resistance was superior (p < 0.01) for high-resistance acrylic resin. The increase in elastomer concentration added to polymethyl methacrylate raised the impact resistance and decreased the fracture resistance. Processing the material by injection decreased its resistance to impact and fracture.
Subject: impact testing
fracture toughness
poly (methyl methacrylate)
Country: Brasil
Editor: Univ Fed Sao Carlos, Dept Engenharia Materials
Citation: Materials Research-ibero-american Journal Of Materials. Univ Fed Sao Carlos, Dept Engenharia Materials, v. 12, n. 4, n. 415, n. 418, 2009.
Rights: aberto
Date Issue: 2009
Appears in Collections:Unicamp - Artigos e Outros Documentos

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