Title: Heating shape memory polymers in alternative ways: microwave and direct electrical heating
Authors: FabrĂ©, Maarten ×
Binst, Johan
Bocsan, Iulia
De Smet, Carl
Ivens, Jan #
Issue Date: 24-Jun-2012
Publisher: University of Padova
Host Document: 15th European Conference on Composite Materials pages:1-8
Conference: European Conference on Composite Materials edition:15 location:Venice, Italy date:24-28 June 2012
Article number: 777
Abstract: For the moment, shape memory polymers or SMPs are mainly used in aerospace and medical
application due to their limited mechanical properties, and small recovery speed and
recovery stress. The transformation and recovery speed is significantly affected by the heating
rate. One way to achieve a faster heating rate is by adding fillers; the SMP can be heated by
direct electrical resistivity, microwaves or induction. Adding carbon nanotubes or CNTs and
carbon black improves the heating rate when heating the SMPs by microwaves, but also
introduced the occurrence of hot spots, limiting the usability of this method of heating. Adding
up to 1.13% CNTs improved the electrical conductivity enough to allow direct electrical
heating, greatly increasing the heating rate. When applying a fixed voltage to the same
sample, both the evolution of the current and temperature differed during the first test from
the following test runs, indicating alignment of the CNTs, resulting in a lower resistivity.
Publication status: published
KU Leuven publication type: IC
Appears in Collections:Structural Composites and Alloys, Integrity and Nondestructive Testing
Department of Materials Engineering - miscellaneous
Technologiecluster Materialentechnologie
Materials Technology TC, Technology Campus De Nayer Sint-Katelijne-Waver
Department of Architecture - miscellaneous
Architecture, Campuses Sint-Lucas Brussels and Ghent
× corresponding author
# (joint) last author

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