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Study of partial shape memory effect of polymers by multicycle tests

Article dans une revue avec comité de lecture
Author
ABDALLAH-ELHIRTSI, Sofiane
RASHMI, Baralu-Jagannatha
PRASHANTHA, Kalappa
FARZANEH, Sedigheh
LACRAMPE, Marie-France
224097 Département Technologie des Polymères et Composites & Ingénierie Mécanique [TPCIM]
KRAWCZAK, Patricia
224097 Département Technologie des Polymères et Composites & Ingénierie Mécanique [TPCIM]
ccTCHARKHTCHI, Abbas
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
ccFITOUSSI, Joseph

URI
http://hdl.handle.net/10985/10180
DOI
10.1002/pc.23472
Date
2015
Journal
Polymer Composites

Abstract

In this work, an experimental investigation on a partial shape memory polymer (PSMP) which is transformed into shape memory material is presented. Multicycle shape memory tests are performed on thermoplastic polyurethane (TPU) at 70°C. At the end of each cycle, the capacity of the shape memory material increases. At the end of the first cycle, the recovery rate of TPU is only 67%; this partial shape memory effect (PSME) has been improved by successive cycles of shape memory tests. After the fourth cycle, it becomes nearly 100% shape memory material. The results of the fifth and sixth cycles confirm this modification. These original results indicate that a polymer with partial shape memory may be transformed into an SMP without any chemical modification. This increase of SME could be related to the creation of residual stresses during the tensile tests. The residual stresses are the origin of the driving force responsible for SME.

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