Table 4.
ID/IG ratio and position of the G band obtained from the Raman spectra as well as thermogravimetric analysis (TGA) data of the different samples.
| Entry | Sample | Ti (°C) | T10 (°C) | Tmax I/II (°C) | FD (%) | ID/IG | G (cm−1) |
|---|---|---|---|---|---|---|---|
| 1 | GO | 124.1 | 180.6 | 235.0 | - | 1.01 | 1595 |
| 2 | HDI-GO 1 | 165.4 | 230.7 | 250.5/396.2 | 21.9 | 1.57 | 1611 |
| 3 | HDI-GO 2 | 141.3 | 199.5 | 248.6/374.6 | 7.6 | 1.22 | 1603 |
| 4 | HDI-GO 3 | 148.6 | 213.6 | 245.6/390.6 | 16.1 | 1.40 | 1609 |
| 5 | HDI-GO 4 | 130.2 | 189.2 | 241.9/385.5 | 4.5 | 1.15 | 1600 |
| 6 | HDI-GO 5 | 174.5 | 242.8 | 250.9/404.2 | 29.2 | 1.66 | 1613 |
| 7 | HDI-GO 6 | 186.3 | 288.3 | 249.7/406.6 | 30.8 | 1.75 | 1617 |
Ti: Initial degradation temperature at 2% weight loss; T10: Temperature of 10% of weight loss; Tmax: Temperature of maximum rate of weight loss. The subscripts I and II refer to the first and second degradation stages. FD: Functionalization degree obtained from TGA thermograms.