Evaluating shape memory behavior of polymer under deep-drawing conditions |
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| Institution: | 1. MMRI/ CAPPA-D, Department of Chemical Engineering, McMaster University, Hamilton, Ontario L8S 4L7, Canada;2. 3M Canada Company, London, Ontario, Canada;1. School of Mechanical, Aerospace and Civil Engineering, United Kingdom;2. North West Composites Centre, School of Materials, The University of Manchester, Manchester M13 9PL, United Kingdom;1. State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, 510640, China;2. Pearl River Water Resources Institute, Pearl River Water Resources Commission, Guangzhou, 510640, China;3. National Paper Products Quality Supervision Inspection Center, Dongguan, 523080, China;1. Dipartimento di Ingegneria Chimica, dei Materiali e della Produzione Industriale, University of Naples Federico II, P.le Tecchio 80, 80125 Naples, Italy;2. Dow Italia s.r.l, Polyurethanes R&D, via Carpi 29, 42015 Correggio, Italy;3. Institute for Macromolecular Studies, National Research Council, Via Edoardo Bassini, 15, 20133 Milan, Italy;1. College of Materials Science and Engineering, Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, Nanshan District Key Lab for Biopolymers and Safety Evaluation, Shenzhen University, Shenzhen 518060, PR China;2. Key Laboratory of Optoelectronic Devices and System of Ministry Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, PR China |
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| Abstract: | Thermoplastic polyurethanes (TPU) are a popular family of shape memory polymers (SMP) due to their excellent abrasion & weather resistant, and mechanical strength. However, conventional processing operations or their combination with other polymers by adhesion or blending can affect their unique shape memory behavior. Currently, there are no effective methods to study and quantify the shape memory behavior of SMP based polymer laminates as they would respond to deep drawing operations. In this paper, a new method was introduced to effectively quantify the recovery behavior of TPU based polymer laminates undergoing simultaneous stretching and bending operations at different processing temperatures. The results presented show the value of developing a shape recovery characterization method that resembles the stresses of thermoforming to properly assess formability of shape memory polymers used in laminate constructions. |
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| Keywords: | Shape recovery Thermoforming Shape memory polymers Bending Laminates |
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