Research Article
Gelatin-Modified Polyurethanes for Soft Tissue Scaffold
Table 1
The symbols and the molar ratio of substrates used in the synthesis of unmodified PU foams.
| Type | Symbol | Polyester PEBA | Chain extender BDO | Chain extender EHEE | Water | Catalyst DABCO | Isocyanate HDI |
| Series I | PU-0.8/BDO/G0* | 0.582 | 0.116 | — | 0.017 | 0.008 | 0.278 | PU-0.9/BDO/G0 | 0.560 | 0.112 | — | 0.017 | 0.007 | 0.303 | PU-1/BDO/G0 | 0.544 | 0.109 | — | 0.016 | 0.007 | 0.323 | PU-1.1/BDO/G0 | 0.525 | 0.105 | — | 0.016 | 0.007 | 0.347 |
| Series II | PU-0.8/EHEE/G0 | 0.539 | — | 0.178 | 0.016 | 0.007 | 0.260 | PU-0.9/EHEE/G0 | 0.522 | — | 0.172 | 0.016 | 0.007 | 0.283 | PU-1/EHEE/G0 | 0.507 | — | 0.167 | 0.015 | 0.007 | 0.303 | PU-1.1/EHEE/G0 | 0.490 | — | 0.1618 | 0.015 | 0.007 | 0.327 |
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PU: polyurethane; 0.8 molar ratio of NCO : OH (0.8 : 1); BDO or EHEE: type of chain extender.
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