Table 2.
Characterization of hydrogels.
| Sample | PLA-PEG | PCL-PEG | MSR [%] a |
MSR [%] b |
MSR [%] c |
|---|---|---|---|---|---|
| HPUCHT-1 | PLA-PEG-1 (80:20) | - | 375 ± 17 | 412 ± 18 | 421 ± 18 |
| HPUCHT-2 | PLA-PEG-2 (85:15) | - | 311 ± 14 | 341 ± 15 | 348 ± 15 |
| HPUCHT-3 | PLA-PEG-3 (88:12) | - | 284 ± 13 | 311 ± 13 | 326 ± 14 |
| HPUCHT-4 | - | PCL-PEG-1 (80:20) | 297 ± 14 | 328 ± 15 | 333 ± 15 |
| HPUCHT-5 | - | PCL-PEG-2 (84:16) | 258 ± 11 | 284 ± 13 | 287 ± 13 |
| HPUCHT-6 | - | PCL-PEG-3 (89:11) | 211 ± 11 | 232 ± 11 | 243 ± 12 |
Reaction conditions: temperature—80 °C, time—3 h (the first step of the prepolymer process) and 4 h (the second step the of prepolymer process); HDI and PLA-PEG 400 (or PCL-PEG 400) molar ratio: 2.05:1 (in a −NCO/−OH); −NCO(prepolymer)/−OH(or −NH2) (CHT) molar ratio: 1.5:1; MSR—mass swelling ratio. a—after 4 h; b—after 24 h; c—after 48 h.