The Residual Stress Effect on the Shape Memory Polymers

The Residual Stress Effect on the Shape Memory Polymers

A. Kallel, M. Lamraoui, J. Fitoussi, A. Tcharkhtchi

Abstract. The current paper presents an experimental study of the residual stress role to recover polymer blend to its original position after deformation. In this study, we use a plymer blend of 40% PolyCaproLactone (PCL) and 60% Styrene-Butadiene-Styrene (SBS). The Shape Memory Polymer (SMP) is able to storing a permanent macroscopic after passing through a temporary one; then under an external stimulus; they can recover their initial shapes. The recovery rate depends on the mechanical property of the mixture and also of the number of the loading cycles. Indeed, one multiplying the number of mechanical loading cycle; generally tensile test; the recovery rate does not change in a linear manner and therefore the residual stress is not added in integer from one cycle to another. In this work we studied the mechanism of the shape as well as property memory effect of the blend under study during a shape memory cycle, to establish a relationship between the “shape memory effect” and the “properties memory effect”. Finally, we measure the “Driving Force” responsible for the shape memory effect by an original method. This study allows establishing a relationship between the rate of recovery and residual stresses introduced into the polymer during its deformation.

Keywords
Shape Memory Polymers, Residual Stress Effect, Driving Force, Blend PCL /SBS

Published online 12/22/2016, 6 pages
Copyright © 2016 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: A. Kallel, M. Lamraoui, J. Fitoussi, A. Tcharkhtchi, ‘The Residual Stress Effect on the Shape Memory Polymers’, Materials Research Proceedings, Vol. 2, pp 151-156, 2017

DOI: http://dx.doi.org/10.21741/9781945291173-26

The article was published as article 26 of the book Residual Stresses 2016

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

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