Research Article
Bio-Based Polyols from Seed Oils for Water-Blown Rigid Polyurethane Foam Preparation
Table 5
Physical properties of RPUR foams prepared from optimized formulations.
| | Property | PUR foam | | Sesame seed oil | Pumpkin seed oil | Raypol® 4218 |
| | Foaming time (s) | Cream time | 23 ± 2 | 22 ± 1 | 32 ± 1 | | Gel time | 37 ± 1 | 36 ± 1 | 44 ± 1 | | Tack-free time | 188 ± 4 | 181 ± 2 | 242 ± 3 | | Rise time | 156 ± 4 | 145 ± 4 | 186 ± 3 |
| | Density (kg/m3) | 40.84 ± 0.33 | 40.78 ± 0.56 | 44.05 ± 0.34 |
| | Compressive strength (kPa) | Parallel to foam rise direction | 240.2 ± 17.5 | 237.7 ± 10.3 | 303.1 ± 26.8 | | Perpendicular to foam rise direction | 152.2 ± 21.3 | 152.3 ± 23.1 | 303.1 ± 26.8 |
| | Thermal conductivity (W/mK) at 25°C | 0.0342 ± 0.0001 | 0.0339 ± 0.0001 | 0.0368 ± 0.0003 |
|
|
