Next Article in Journal
Next Article in Special Issue
Previous Article in Journal
Previous Article in Special Issue
Appl. Sci. 2012, 2(2), 535-548; doi:10.3390/app2020535
Article

High Performance Shape Memory Polyurethane Synthesized with High Molecular Weight Polyol as the Soft Segment

1
, 2
, 3
, 2,4
, 3
, 1
 and 1,*
Received: 18 April 2012; in revised form: 22 May 2012 / Accepted: 23 May 2012 / Published: 31 May 2012
(This article belongs to the Special Issue Feature Papers)
View Full-Text   |   Download PDF [561 KB, updated 1 June 2012; original version uploaded 31 May 2012]   |   Browse Figures
Abstract: Shape memory polyurethanes (SMPUs) are typically synthesized using polyols of low molecular weight (MW~2,000 g/mol) as it is believed that the high density of cross-links in these low molecular weight polyols are essential for high mechanical strength and good shape memory effect. In this study, polyethylene glycol (PEG-6000) with MW ~6000 g/mol as the soft segment and diisocyanate as the hard segment were used to synthesize SMPUs, and the results were compared with the SMPUs with polycaprolactone PCL-2000. The study revealed that although the PEG-6000-based SMPUs have lower maximum elongations at break (425%) and recovery stresses than those of PCL-based SMPUs, they have much better recovery ratios (up to 98%) and shape fixity (up to 95%), hence better shape memory effect. Furthermore, PEG-based SMPUs showed a much shorter actuation time of < 10 s for up to 90% shape recovery compared to typical actuation times of tens of seconds to a few minutes for common SMPUs, demonstrated their great potential for applications in microsystems and other engineering components.
Keywords: thermal-responsive SMPUs; polyurethanes; high molecular weight; low recovery stress thermal-responsive SMPUs; polyurethanes; high molecular weight; low recovery stress
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Export to BibTeX |
EndNote


MDPI and ACS Style

Ahmad, M.; Xu, B.; Purnawali, H.; Fu, Y.; Huang, W.; Miraftab, M.; Luo, J. High Performance Shape Memory Polyurethane Synthesized with High Molecular Weight Polyol as the Soft Segment. Appl. Sci. 2012, 2, 535-548.

AMA Style

Ahmad M, Xu B, Purnawali H, Fu Y, Huang W, Miraftab M, Luo J. High Performance Shape Memory Polyurethane Synthesized with High Molecular Weight Polyol as the Soft Segment. Applied Sciences. 2012; 2(2):535-548.

Chicago/Turabian Style

Ahmad, Manzoor; Xu, Bin; Purnawali, Hendra; Fu, Yongqing; Huang, Weimin; Miraftab, Mohsen; Luo, Jikui. 2012. "High Performance Shape Memory Polyurethane Synthesized with High Molecular Weight Polyol as the Soft Segment." Appl. Sci. 2, no. 2: 535-548.

Appl. Sci. EISSN 2076-3417 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert