Facile fabrication of thermoplastic ternary copolymerized polyamide and maleated polyethylene shape memory blends |
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| Institution: | 1. Department of Railway Engineering, School of Civil Engineering, Central South University, Changsha, Hunan, 410075, China;2. Department of Engineering and Technology, Trelleborg IAVS, Leicester, LE4 2BN, UK;3. Department of Automotive Engineering, Tsinghua University, Beijing, 100084, China;1. Academy of Opto-Electronics, Chinese Academy of Sciences, Beijing 100094, China;2. School of Aeronautic Science and Engineering, Beihang University, Beijing 100191, China;1. Institute of Continuous Media Mechanics UB RAS, Perm, Russia;2. Perm State University, Perm, Russia;3. Leibniz Institute of Polymer Research, Dresden, Germany;1. Department of Civil Engineering and Architecture, University of Catania, Italy;2. Department of Electrical, Electronics, and Informatics Engineering, University of Catania, Viale A. Doria, 6-95125 Catania, Italy;1. Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing 100029, PR China;2. Engineering Research Center of Elastomer Materials Energy Conservation and Resources, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, PR China;3. State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing University of Chemical Technology, Beijing 100029, PR China;4. Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, PR China |
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| Abstract: | Novel thermoplastic shape memory blends of ternary copolymerized polyamide (PAM) and maleated polyethylene (PE-g-MAH) were prepared by a simple melt-blending method, which might provide a new way for the industrial production of thermoplastic shape memory materials. The new chemical bonds were generated between PAM and PE-g-MAH, which was essential for enhancement of properties. The mechanical, thermal and shape memory properties of the blends were investigated in detail. It was found that the microstructure and proportion of different constituents was vital for the shape memory properties of the blends. In PAM/PE-g-MAH blends, a crystalline region of PAM acted as a fixed domain, and the crystalline region in PE-g-MAH acted as a reversible domain. The synergistic effect of the fixed and reversible domains determined the shape memory behavior of the blends. When the blend ratio of PAM/PE-g-MAH was 30/70, the composites exhibited the best shape memory properties, with a shape fixity ratio of 95.5% and a shape recovery ratio of 79.8%. |
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| Keywords: | Shape memory Ternary copolymerized polyamide Polyethylene Blend ratios |
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