Study on the thermal-induced shape memory effect of pyridine containing supramolecular polyurethane

Shaojun Chen, Jinlian Hu, Haitao Zhuo, Chunwah Yuen, Laikuen Chan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

71 Citations (Scopus)

Abstract

In this paper, a series of pyridine containing supramolecular polyurethanes (PUPys) were synthesized from BINA, HDI and BDO. Then the structure, morphology and thermal-induced shape memory effect (SMEs) of PUPys were investigated systematically. Results show that strong hydrogen bonding is formed in the urethane group as well as in the pyridine ring; and phase separation consisting of soft phase and hard phase occurs in the PUPy. In addition, it is found that the lower limit of BINA content for PUPys exhibiting good SMEs is 30 wt%. PUPys with higher BINA content show higher shape fixity, higher shape recovery and better strain stability. Moreover, the shape recovery force increases with the decreasing of BINA content. Finally, the temperature-dependent FT-IR spectra support that the hydrogen bonding in the pyridine ring serves as the molecular switch; while the hydrogen bonding in the urethane groups acts as the physical netpoints for the utilization of PUPys as SMMs.
Original languageEnglish
Pages (from-to)240-248
Number of pages9
JournalPolymer
Volume51
Issue number1
DOIs
Publication statusPublished - 6 Jan 2010

Keywords

  • Polymer
  • Shape memory
  • Supramolecular structure

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics

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