This study investigated the improvement of mechanical and thermal properties in polypropylene matrix composites by adding glass fiber reinforcement. The results showed significant outputs in several tests. The addition of reinforcing particles resulted in a decrease in yield strain, while causing significant changes in yield strength. Charpy impact tests showed different energy absorption. This study investigated the effect of adding glass fibers with different L/D ratios (250, 300, 350) on the mechanical and thermal properties of injection molded polypropylene composites. The samples were produced by twin-screw extrusion and injection molding and tested according to ISO and ASTM standards. The results showed that the sample with 30% glass fibers (L/D=350) had the highest yield strength (98.6 MPa), impact energy absorption (14.1 kJ/m²), and thermal deflection temperature (151.7°C), and the shrinkage was reduced to 0.26%. These results indicate the potential of these composites for engineering applications with high dimensional accuracy. In addition, the addition of glass fibers resulted in a decrease in the melt flow index, while other particles showed the least effect.
Ebrahimian,M R , Rahmani,F and hajnasiri,H . (2025). Enhancement of Mechanical and Thermal Properties of Injection-Molded Polypropylene Parts Using Glass Fibers. (e229232). Science and Technology in Mechanical Engineering, (), e229232 doi: 10.22034/stme.2025.532480.1141
MLA
Ebrahimian,M R , , Rahmani,F , and hajnasiri,H . "Enhancement of Mechanical and Thermal Properties of Injection-Molded Polypropylene Parts Using Glass Fibers" .e229232 , Science and Technology in Mechanical Engineering, , , 2025, e229232. doi: 10.22034/stme.2025.532480.1141
HARVARD
Ebrahimian M R, Rahmani F, hajnasiri H. (2025). 'Enhancement of Mechanical and Thermal Properties of Injection-Molded Polypropylene Parts Using Glass Fibers', Science and Technology in Mechanical Engineering, (), e229232. doi: 10.22034/stme.2025.532480.1141
CHICAGO
M R Ebrahimian, F Rahmani and H hajnasiri, "Enhancement of Mechanical and Thermal Properties of Injection-Molded Polypropylene Parts Using Glass Fibers," Science and Technology in Mechanical Engineering, (2025): e229232, doi: 10.22034/stme.2025.532480.1141
VANCOUVER
Ebrahimian M R, Rahmani F, hajnasiri H. Enhancement of Mechanical and Thermal Properties of Injection-Molded Polypropylene Parts Using Glass Fibers. STME. 2025;():e229232 (In Persian). doi: 10.22034/stme.2025.532480.1141
Science and Technology in Mechanical Engineering