IADR Abstract Archives
Single filament tensile strength of some E-glass-fiber
Objective: Fiber reinforced composites (FRC) are increasingly used in various dental applications. Main factors influencing final mechanical properties of FRC are; strength of reinforcing fibers, strength of polymer matrix and also adhesion between fiber and polymer matrix. Aim of this study was to evaluate tensile strength of various E-glass fiber.
Methods: Various single E-glass fiber (n=30/group) (Ahlstrom and PPG) were taken from different tex-rowing and embedded to acrylate resin using gauge length of 15 mm. Diameter of each fiber was evaluated using microscope. Specimens were tensile tested using loading rate of 1.0 mm/min with a material testing device (Lloyd LRX) using 5N load cell and maximum load was recorded (N). Tensile strength values (MPa) were calculated and data were analyzed statistically using one-way analysis of variance, followed by the Tukey B post hoc test (p=.05) and Weibull statistics. Results: Analysis of variance indicated significantly different tensile strengths between different type of fiber (p<0.05).
Tex | 300 | 1200 | 2400 | 4800 | 2002 |
Diameter (µm) | 14.3(1.1) | 17.4(2.5) | 17.3(1.5) | 25.4(2.9) | 20.4(3.9) |
Characteristic strength (MPa) (Weibull) | 2010 ab | 1810 b | 1784 b | 2034 a | 1419 c |
Weibull modulus | 6.22 | 3.81 | 2.94 | 10.81 | 3.39 |
Same superscript letter indicates homogenous subset (Tukey, P<0.05)
Conclusion: When mechanical properties of FRC is optimized, variability of tensile strength of E-glass fiber should taken in account.