Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/19579
Title: Effect of MDI-BDO hard segment on pyridine-containing shape memory polyurethanes
Authors: Chen, S
Hu, J 
Zhuo, H
Chen, S
Issue Date: 2011
Publisher: Springer
Source: Journal of materials science, 2011, v. 46, no. 15, p. 5294-5304 How to cite?
Journal: Journal of materials science 
Abstract: Shape memory polymers are attractive for both science and industrial application. In this article, a series of pyridine-containing supramolecular shape memory polyurethanes (Py-SMPUs) with various diphenylmethane diisocyanate-butanediol (MDI-BDO) contents are synthesized from the 1,6-hexamethylene diisocyanate (HDI), N,N-bis(2-hydroxylethyl) isonicotinamide (BINA), BDO, and MDI. Then, they are investigated systematically using FT-IR, DSC, DMA, WAXD, and shape memory testing. The results show that the addition of MDI-BDO segment improves the strength of hydrogen bonding of Py-SMPUs. It promotes the formation of hard domains, but not influences the phase-separation structure, the intensity, and distribution of physical netpoints. In addition, the MDI-BDO segment improves the rubber modulus and drops the energy loss of Py-SMPUs. However, it does not influence the shape memory behaviors which are mainly influenced by the BINA content. If the BINA content is beyond 30 wt%, good shape memory effect can be achieved in the BINA-HDI-BDO-MDI system; and high shape recovery force can be obtained by increasing the MDI-BDO segment.
URI: http://hdl.handle.net/10397/19579
ISSN: 0022-2461
EISSN: 1573-4803
DOI: 10.1007/s10853-011-5469-9
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