Research Article
Shrinkage and Warpage Mechanism of Overflow Water-Assisted Injection Molding Short Fiber-Reinforced Polymers
Table 2
Characteristics of polypropylene-based short fiber composites.
| Characteristic parameters | PP | 20% SGFPP | 30% SGFPP | 40% SGFPP |
| Melt flow rate (230°C/2.16 kg) | 22 g/10 min | 6.0 g/10 min | 5.0 g/10 min | 3.0 g/10 min | Density (23°C) | 0.9 g/cm3 | 1.03 g/cm3 | 1.12 g/cm3 | 1.21 g/cm3 | Tensile stress at yield | 25.3 MPa | 50.0 MPa | 61.0 MPa | 73.0 MPa | Flexural modulus | 1017 MPa | 3300 MPa | 4700 MPa | 5900 MPa | Notched izod impact strength (23°C) | 5.0 kJ/m2 | 14 kJ/m2 | 18 kJ/m2 | 19 kJ/m2 |
|
|