Effect of microphase-separation promoters on the shape-memory behavior of polyurethane

Shaojun Chen, Qi Cao, Bo Jing, Yuanli Cai, Pengsheng Liu, Jinlian Hu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

40 Citations (Scopus)


A series of segmented polyurethanes (PUs) with novel thermosensitive shape-memory behavior were synthesized via the in situ addition of a small amount of 1octadecanol (ODO) to a PU system. For comparison, liquid paraffin (LP) modified PUs were also synthesized. The effects of a small amount of ODO or LP on the PU supra-structure and the thermosensitive shape-memory properties were studied with X-ray diffraction, differential scanning calorimetry, dynamic mechanical analysis, and shape-memory studies. The results indicated that the in situ addition of a small amount of ODO (e.g., 0.3 wt %) remarkably promoted microphase separation, facilitating the ordered packing of soft segments and the formation of perfect hard-segment domains and thus significantly improving the shape-memory properties. In contrast, LP had less significant influence on the shape-memory behavior because of the macrophase separation of these nonpolar alkyl chains from the PU system.
Original languageEnglish
Pages (from-to)5224-5231
Number of pages8
JournalJournal of Applied Polymer Science
Issue number6
Publication statusPublished - 15 Dec 2006


  • Crystallization
  • Interfaces
  • Modification
  • Polyurethanes
  • Stimuli-sensitive polymers

ASJC Scopus subject areas

  • Chemistry(all)
  • Surfaces, Coatings and Films
  • Polymers and Plastics
  • Materials Chemistry

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