An experimental investigation of the effect of strain on the electrical conductivity of a shape memory polymer |
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| Affiliation: | 1. Center for Material Science, B.V. Bhoomaraddi College of Engineering and Technology, Hubballi, Karnataka, India;2. Department of Mechanical Engineering, B.V. Bhoomaraddi College of Engineering and Technology, Hubballi, Karnataka, India;3. Department of Civil Engineering, B.V. Bhoomaraddi College of Engineering and Technology, Hubballi, Karnataka, India;4. Rani Channamma University Belgaum, B.V. Bhoomaraddi College of Engineering and Technology, Hubballi, Karnataka, India;1. AGH University of Science and Technology, Faculty of Foundry Engineering, Krakow, Poland;2. Foundry Research Institute, Krakow, Poland;1. Institut des sciences de la mer de Rimouski, Université du Québec à Rimouski, 310, Allée des Ursulines, Rimouski, QC G5L 3A1, Canada;2. Department of Fisheries and Oceans, Maurice Lamontagne Institute, P.O. Box 1000, 850 Route de la Mer, Mont-Joli, QC G5H 3Z4, Canada;3. Aquatic Ecosystem Protection Research Division, Environment Canada, Burlington, ON L7R 4A6, Canada;4. Saint-Petersburg Scientific Research Centre for Ecological Safety, Russian Academy of Sciences, Korpusnaya, 18, St. Petersburg 197110, Russia;5. Laboratoire de Chimie, Institut des Sciences de la Terre, Centre d’Etude et de Recherche de Djibouti (CERD), Route de l’aéroport, B.P. 486, Republic of Djibouti |
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| Abstract: | A thermally triggered shape memory polymer (SMP) was prepared by blending electrically conductive carbon black (CB) into the resin prior to curing. The CB filled composite can then be activated through resistive heating. With the aim of using such SMPs in reconfigurable structures and/or actuators, the effect of strain on the conductive nature of the SMP composite was investigated. The study has specifically focused on changes to conductivity in, i) the transverse direction during tensile elongation to assess the impact of the Poisson effect, and ii) in samples deformed in compression. The dynamic response characteristics of the electrically activated SMP were also tested to assess the feasibility of using the composite in tunable vibration damping applications. Findings have shown that the pattern of changes in the transverse conductivity, which is marked by an increase-decrease-increase sequence, resembles that seen in the axial direction. SEM imaging of the samples was performed along the axial and transverse axes of deformation and shows no anisotropy in the CB filler distribution. To demonstrate potential uses of a conductive SMP in the sub-Tg temperature range, a discussion of a vibration damping application has been included. |
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| Keywords: | Shape-memory Polymer Electrically triggered Material characterization |
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