Study of the thermal properties of shape memory polyurethane nanofibrous nonwoven

Haitao Zhuo, Jinlian Hu, Shaojun Chen

Research output: Journal article publicationJournal articleAcademic researchpeer-review

28 Citations (Scopus)

Abstract

Thermal properties of polymer are very important to the understanding of morphology and shape memory effect of shape memory polymers (SMPs). In this article, the thermal properties of shape memory polyurethane nanofibrous nonwoven are investigated systematically from the morphology of nanofibers, crystalline structure, isothermal crystallization behavior, and thermal-dependent strain recovery. The results indicate that the thermal properties of shape memory polyurethane nanofibrous nonwoven are influenced greatly by the electro-spinning and the recrystalline condition. The crystal melting temperature (Tm) decreases as the crystallization temperature (Tc) decreases, while the relative degree of crystallinity (Xc) increases with the decrease of Tcwithin the temperature range of 20 to -30 °C. In particular, when the annealing temperature is higher than 150 °C, the Tmshifts to higher value and the Xcdecreases significantly with the increase of Tc. Finally, temperature-dependent strain recovery curves show that the shape memory polyurethane nanofiber tends to have a lower recovery temperature as compared with the SMPU bulk film due to their ultrafine diameter.
Original languageEnglish
Pages (from-to)3464-3469
Number of pages6
JournalJournal of Materials Science
Volume46
Issue number10
DOIs
Publication statusPublished - 1 May 2011

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this