Table 2. Chemical Compositions and Mass Swelling of Hydrogel Samples.
| Water, rt | |||||
|---|---|---|---|---|---|
| Sample | Cross-linker | Molecular Mass (g/mol) | Ratio of SH:norbornene | Concentration of cross-linker (mol %) | Average swelling ratioa |
| Alg-norb10-1 | PEG dithiol 1500 | 1500 | 0.9:1 | 10 | 254.6 ± 14.8 |
| Alg-norb10-2 | PEG dithiol 1500 | 1500 | 0.5:1 | 5 | 1199.0 ± 114.3 |
| Alg-norb10-3 | PEG dithiol 5000 | 5000 | 0.9:1 | 10 | 337.7 ± 23.7 |
| Alg-norb10-4 | 4arm PEG 5000 | 5000 | 0.9:1 | 10 | 161.7 ± 16.3 |
a
Mass swelling ratios (swollen/dried) of Alg-norb hydrogels (11 mol % norbornene functionalization) cross-linked with different cross-linkers in deionized water. Four samples were measured for each condition.