Abstract
In this communication, novel moisture-sensitive shape memory polyurethane (SMPU) was synthesized from 1,6-hexamethylene diisocyanate (HDI) and N,N-bis(2-hydroxylethyl) isonicotinamide (BINA) and 1,4-butanediol (BDO). Results show that the BINA based SMPUs have excellent moisture absorption properties which are not only influenced by the temperature, but also by the relative humidity (RH). As a result, high strain recovery with fast recovery speed is obtained after immersion in the moisture condition for a short time. FT-IR spectra provide a proof to the mechanism of moisture-sensitive SME which is based on the dissociation or disrupt of hydrogen bonding in the pyridine ring induced by moisture absorption. Thus, the strain recovery is achieved in the moisture-sensitive SMPUs by decreasing the glass transition temperature (Tg) below ambient temperature without external heating.
| Original language | English |
|---|---|
| Pages (from-to) | 4424-4428 |
| Number of pages | 5 |
| Journal | Polymer |
| Volume | 50 |
| Issue number | 19 |
| DOIs | |
| Publication status | Published - 10 Sept 2009 |
Keywords
- Polymer
- Shape memory
- Supramolecular structure
ASJC Scopus subject areas
- Organic Chemistry
- Polymers and Plastics
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