Characterization the mechanical properties of Sustainable poly(methyl methacrylate) biopolymer
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Denture materials must have robust mechanical properties to withstand high pressures within the mouth. The present study investigates the mechanical properties, including the tensile, hardness, and impact of a new denture composite made of poly(methyl methacrylate) (PMMA) and reinforced with eggshell (ES) powder. The new PMMA (PMMA-EC) was manufactured by mixing different ratios of ES (1 to 7% wt.) with 5% (wt) of Chitosan (CS) (as antibacterial). The new composite was tested for the tensile, hardness, and impact, and the results were compared with those of the traditional PMMA-EC (containing only 5% chitosan). Additionally, a Scanning Electron Microscopy (SEM) was used to examine the dispersion of ES in the material. The results of this study indicated that adding 1% of ES powder did not affect the mechanical properties of the composite. However, increasing the ratio of ES powder to 5% achieved the best improvement in the mechanical properties of the new composite, while increasing the ES ratio by more than 5% caused a considerable decrease in the mechanical strength. Generally, the tensile, hardness, and impact of the new denture composite were examned, respectively
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