TABLE 4.
Chemical shifts from 29Si CP-MAS NMR and percentage abundance from 29Si single-pulse MAS NMR of silicon T and Q species (from GPTMS and TEOS, respectively), and the corresponding degree of condensation (Dc) of the silica network of the SiO2-CaOCME/PTHF/PCL-diCOOH hybrids.
| T2 | T3 | Q1 | Q2 | Q3 | Q4 | Dc | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sample ID | δiso | I | δiso | I | δiso | I | δiso | I | δiso | I | δiso | I | |
| [ppm] | [%] | [ppm] | [%] | [ppm] | [%] | [ppm] | [%] | [ppm] | [%] | [ppm] | [%] | [%] | |
| 100S-CL Tallia et al. (2022) | −58.8 | 3.8 | −66.0 | 14.5 | - | - | - | - | −102.5 | 27.9 | −111.5 | 53.8 | 91.8 |
| 95S5CCME-CL | −57.5 | 2.5 | −65.4 | 15.2 | - | - | −92.4 | 2.1 | −102.0 | 39.2 | −110.7 | 41.0 | 88.3 |
| 90S10CCME-CL | −57.1 | 4.3 | −65.2 | 14.2 | - | - | −91.3 | 3.3 | −101.4 | 35.2 | −110.1 | 43.1 | 88.2 |
| 70S30CCME-CL | −58.5 | 14.4 | −66.4 | 17.1 | - | - | −93.3 | 1.7 | −101.8 | 26.3 | −110.6 | 40.5 | 87.8 |
| 60S40CCME-CL | −57.9 | 6.0 | −65.9 | 18.3 | −82 | 5.0 | −91.9 | 15.9 | −102.0 | 30.2 | −111 | 24.7 | 78.9 |