Evaluation of flexural properties and dynamic mechanical analysis of glass fiber-reinforced polyamide resin

Authors : Senem ÜNVER, Arzu Zeynep YILDIRIM

Pages : 116-123

Doi:10.26650/eor.2021872015

View : 14 | Download : 5

Publication Date : 2021-09-21

Article Type : Research Paper

Abstract :Purpose The aim of this study was to evaluate flexural strength, elastic modulus and dynamic mechanical analysis insert ignore into journalissuearticles values(DMA); of heat-polymerized polymethyl methacrylate resin, polyamide resin and glass fiber-reinforced polyamide resin. Materials and Methods Three groups were determined according to denture base materials as polymethyl methacrylate resin insert ignore into journalissuearticles values(H);, polyamide resin insert ignore into journalissuearticles values(P); and glass fiber reinforced polyamide resin insert ignore into journalissuearticles values(R);. Sixteen specimens for each denture base material were prepared with dimensions of 64x10x3.3 mm for three-point bending test. Two specimens for each denture base material were prepared with dimensions of 30x10x3 mm for DMA. Polymethyl methacrylate and polyamide specimens were prepared according to the manufacturer’s recommendations. The silane was applied to glass fibers insert ignore into journalissuearticles values(4.5 mm length); 2% by weight of the polyamide resin, they were placed in polyamide resin cartilages and injected to the mold. The thermal aging procedure was applied to half of specimens of each material insert ignore into journalissuearticles values(n=8);. Flexural strength and elastic modulus of the specimens were determined by three-point bending test at a speed of 5 mm/ min. DMA was performed to 1 specimen from each group to evaluate viscoelastic properties. Data were analyzed with one-way ANOVA, Tukey and Paired t tests. Results A statistically significant difference was found in flexural strength and elastic modulus values of denture base materials insert ignore into journalissuearticles values(p=0.00);. The highest flexural strength and elastic modulus values were observed in polymethyl methacrylate group. There was no significant difference between polyamide and glass-fiber reinforced polyamide groups insert ignore into journalissuearticles values(p=0.497);. No significant difference was determined in all three- denture base materials before and after aging procedure. Conclusion The reinforcement with glass-fibers did not affect the flexural strength and elastic modulus of polyamide resin.
Keywords : Polyamide resin, flexural strength, DMA, strengthening, glass fiber