Table 3.
Formulation and comparative results of the three glycolysis types. PU: polyurethane; DEG: diethylene glycol; DEOA: diethanolamine.
| Glycolysis Method | Atmospheric Pressure | Autoclave | Microwave |
|---|---|---|---|
| Experiment Number | EXP. 1 | EXP. 2 | EXP. 3 |
| PU Foam waste (%) | 25.0 | 25.0 | 25.0 |
| DEG (%) | 75.0 | 75.0 | 75.0 |
| DEOA (%) | 0.5 | 0.5 | 0.5 |
| Temperature (°C) | 180–190 | 180.0 | 190.0 |
| Reaction time (min) | 120.0 | 120.0 | 10.0 |
| Water content (%) | 0.202 | 0.372 | 0.457 |
| Viscosity (cSt) | 179.0 | 172.0 | 167.0 |
| Hydroxyl number (mg KOH/g) | 823.0 | 869.0 | 784.0 |
| Density (g/cm3) | 1.12 | 1.14 | 1.17 |