Nanoclay-reinforced polymethylmethacrylate and its mechanical properties
Background: Incorporation of extra fillers into dental resins might enhance their physical properties. In this study, the tensile and impact strengths of modified heat-curing acrylic resin reinforced with nanoclay were investigated. Materials and Methods: In this experimental study, nanoclay-acrylic...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Wolters Kluwer Medknow Publications
2018-01-01
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| Series: | Dental Research Journal |
| Subjects: | |
| Online Access: | http://www.drjjournal.net/article.asp?issn=1735-3327;year=2018;volume=15;issue=4;spage=295;epage=301;aulast=Barzegar |
| Summary: | Background: Incorporation of extra fillers into dental resins might enhance their physical properties. In this study, the tensile and impact strengths of modified heat-curing acrylic resin reinforced with nanoclay were investigated.
Materials and Methods: In this experimental study, nanoclay-acrylic resin composite was prepared by mixing 0.5, 1, and 2 wt% of nanoclay with methacrylate monomer in an ultrasonic probe, followed by mixing with the polymethylmethacrylate (PMMA) powder. 24 cubic 20 mm × 20 mm × 200-mm specimens for each test, 18 samples containing nanoclay and 6 samples for the control group and a total of 48 samples were prepared. The tensile and impact strengths of the samples were tested according to ISO 527 and 179, respectively. One-way ANOVA was used for statistical analysis, followed by multiple comparison tests (Scheffé's test). Statistical significance was set at P < 0.05.
Results: The maximum mean tensile and impact strengths were recorded in the control group, and an acrylic resin containing 2% of nanoclay demonstrated the minimum mean in all the tests. Increasing the percentage of nanoclay in PMMA compromised the tensile strength (P < 0.05) with no effect on its impact strength.
Conclusion: Incorporation of nanoclay particles into acrylic resins can adversely affect the mechanical properties of the final products, and this effect is directly correlated with the concentration of nanoparticles. |
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| ISSN: | 1735-3327 2008-0255 |