Novel moisture-sensitive shape memory polyurethanes containing pyridine moieties

Shaojun Chen, Jinlian Hu, Chun wah Yuen, Laikuen Chan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

128 Citations (Scopus)


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 languageEnglish
Pages (from-to)4424-4428
Number of pages5
Issue number19
Publication statusPublished - 10 Sept 2009


  • Polymer
  • Shape memory
  • Supramolecular structure

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics


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