Processing and characterization of highly oriented fibres of biodegradable nanocomposites |
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| Affiliation: | 1. Talgo R&D, Patentes Talgo, Paseo del Tren Talgo 2, 28290 Las Rozas (Madrid), Spain;2. Grupo de Investigación en Ingeniería de Máquinas, Universidad Politécnica de Madrid, José Gutiérrez Abascal 2,28006 Madrid, Spain;1. School of Mechanical Engineering, Iran University of Science and Technology, Narmak 16842-13114, Tehran, Iran;2. Center of Excellence in Railway Transportation, Iran University of Science and Technology, 16842-13114 Narmak, Tehran, Iran;1. Key Laboratory of Advanced Textile Materials and Manufacturing Technology, Ministry of Education, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China;2. College of Materials and Textiles, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China;1. IOR Research Institute, Vanak Sq., Tehran, Iran;2. Department of Petroleum Engineering, Petroleum University of Technology (PUT), Ahwaz, Iran;3. Young Researchers and Elites Club, North Tehran Branch, Islamic Azad University, Tehran, Iran |
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| Abstract: | Biodegradable polymeric materials are becoming day by day ever more important in packaging, agriculture, single-use cutleries and other large consumer applications. The major part of those materials is used under the form of film, i.e. subjected to elongational flow, but the main problem is that they often offer poor mechanical properties. Adding nanofillers, like Multi Walled Carbon Nanotubes (MWCNTs) may solve this problem but only if there is a full control of their orientation inside the material. Aim of this work is to investigate the processing-properties-morphology relationships for a system prepared under elongation flow of MaterBi and commercial MWCNTs. The materials were characterized both in shear and non-isothermal elongational flow and mechanical tests have been done on hot and cold drawn fibres. The morphology has been investigated by TEM.The shear viscosity increases dramatically in the presence of the MWCNTs, and the Cox–Merz relation does not hold.The mechanical properties of the hot stretched fibres strongly increase with the draw ratio but the increase is larger for the filled fibres because of the orientation of the MWCNTs. This is not true for the cold drawing because the very low mobility of the MWCNTs hinders their further orientation and the final properties seem driven by the matrix. |
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| Keywords: | A. Polymer-matrix composites (PMCs) B. Mechanical properties B. Rheological properties E. Melt-spinning |
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