High molecular weight soft segment based polyethylene shape memory polymers

Ahmad, Manzoor, Luo, Jikui, Xu, Ben, Purnawali, Hendra, King, Peter, Chalker, Paul, Fu, Yong Qing, Huang, Wei Min and Miraftab, Mohsen (2012) High molecular weight soft segment based polyethylene shape memory polymers. World Journal of Engineering, 9 (3). pp. 179-186. ISSN 1708-5284

Full text not available from this repository. (Request a copy)
Official URL: http://dx.doi.og/10.1260/1708-5284.9.3.179

Abstract

Shape memory polyurethanes (SMPUs) are typically synthesized using polyols of low molecular weight, Mw, and high hydroxyl number as it is believed that high density of cross-links in these polyols are essential for high performance shape memory polymers. In this study, polyethylene glycol (PEG-6000) with Mw ~ 6000 g/mol and low hydroxyl number (OH ~ 18 mg K OH/g) as the soft segment and diisocyanate as the hard segment were used to synthesize SMPUs. It revealed that although the PEG-6000 based SMPUs have lower maximum elongation at break (425%) and recovery stress than those of PCL-2000 polyol based SMPUs, they have much better shape recovery ratio (98%) and shape fixity (95%). Furthermore, these SMPUs showed a much shorter actuation time of <10sec for up to 85% shape recovery, much shorter than those low Mw SMPUs, clearly demonstrated their great potential for applications.

Item Type: Article
Uncontrolled Keywords: Shape memory, actuation, cross-links
Subjects: F100 Chemistry
F200 Materials Science
H300 Mechanical Engineering
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: Ben Xu
Date Deposited: 06 Jun 2013 13:17
Last Modified: 10 Aug 2015 11:13
URI: http://nrl.northumbria.ac.uk/id/eprint/12786

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year

View more statistics


Policies: NRL Policies | NRL University Deposit Policy | NRL Deposit Licence