Citation: Cong-cong Liu, Ai-ying Zhang, Lin Ye, Zeng-guo Feng. SELF-HEALING BIODEGRADABLE POLY(UREA-URETHANE) ELASTOMERS BASED ON HYDROGEN BONDING INTERACTIONS[J]. Chinese Journal of Polymer Science, ;2013, 31(2): 251-562. doi: 10.1007/s10118-013-1211-1 shu

SELF-HEALING BIODEGRADABLE POLY(UREA-URETHANE) ELASTOMERS BASED ON HYDROGEN BONDING INTERACTIONS

Received Date: 8 March 2012
Revised Date: 2 July 2012

Fund Project: The work was in part financially supported by the 863 Project of Minister of Science and Technology of China (No. 2007AA021905).

Self-healing poly(urea-urethane)s (PUUs) showing a tolerance to mechanical damage are particularly desirable for high-performance elastomeric biomaterials. In this study a kind of biodegradable PUUs was synthesized from poly(-caprolactone) diol with L-lysine ethyl ester diisocyanate (LDI) extended with L-lysine ethyl ester dihydrochloride (LEED) in DMF and characterized by using 1H-NMR, FTIR, DSC, XRD, SEM and tensile tests. Interestingly, they exhibited a self-healing characteristic upon exposure to 37℃ for as short as 30 min with the tensile strength keeping at 4.23 MPa and the elongation at break reaching to 627%. It is revealed that increasing the hard segment content in PUUs benefits the self-healing performance, and on the opposite increasing the soft segment content contributes to the biodegradability.
- L-lysine ethyl ester diisocyanate
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