| Sample | V0 | V | v = V0/V | v2 | v1/3 | Crosslinking density ×10−3 mol·cm−3 |
| PU | 18.308 | -- | -- | -- | -- | -- |
| LPU1 | 21.949 | 73.359 | 0.29920 | 0.08952 | 0.66884 | 0.31024 |
| LPUT1 | 26.162 | 72.816 | 0.35929 | 0.12909 | 0.71091 | 0.55047 |
| LPUPT2 | 17.444 | 29.047 | 0.60054 | 0.36065 | 0.84369 | 3.33768 |
| LPUPT3 | 30.421 | 55.011 | 0.55299 | 0.30580 | 0.82080 | 2.42933 |