Research Article
Hybrid and Nonhybrid Laminate Composites of Sugar Palm and Glass Fibre-Reinforced Polypropylene: Effect of Alkali and Sodium Bicarbonate Treatments
Table 2
Density and volumetric compositions of fibre and void of the composites.
| | Number of layers | Thickness (mm) | Density (g/cm3) | Fibre volume fraction (%) | Void content (%) | | | |
| | L01 | 6 (GF6) | 4.1 | 1.25 | 0 | 19.9 | 19.9 | 1.34 | | L02 | 4 (SU4) | 5.5 | 1.02 | 28.1 | 0 | 28.1 | 2.02 | | L03 | 4 (SA4) | 5.5 | 1.03 | 30.9 | 0 | 30.9 | 1.89 | | L04 | 4 (SN4) | 5.5 | 1.02 | 31.0 | 0 | 31.0 | 1.88 | | L05 | (GF2/SU2/GF2) | 5.6 | 1.15 | 16.9 | 12.4 | 29.3 | 1.64 | | L06 | (GF2/SA2/GF2) | 5.6 | 1.16 | 17.2 | 12.8 | 30.0 | 1.55 | | L07 | (GF2/SN2/GF2) | 5.6 | 1.14 | 15.9 | 11.7 | 27.6 | 1.58 |
|
|
