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The water swelling ratios of different PU films
| WBPU film in 37°C DDW | PU1 | PU2 | PU3 |
|---|---|---|---|
| Swelling ratio (%) | 9.78±0.15 | 12.79±0.37 | 14.65±0.3 |
Note: Data are presented as mean ± standard deviation.
Abbreviations: DDW, distilled de-ionized water; WBPU, waterborne biodegradable polyurethane; PU, polyurethane.
