Preparation and properties of self-reinforced poly(lactic acid) composites based on oriented tapes |
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| Affiliation: | 1. School of Engineering and Materials Science, and Materials Research Institute, Queen Mary University of London, Mile End Road, E1 4NS London, UK;2. Nanoforce Technology Ltd., Joseph Priestley Building, Queen Mary University of London, Mile End Road, E1 4NS London, UK;1. Department of Polymer Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Muegyetem rkp. 3, H-1111 Budapest, Hungary;2. Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan, ROC;3. MTA-BME Research Group for Composite Science and Technology, Muegyetem rkp. 3, H-1111 Budapest, Hungary;1. Division of Materials Science, Luleå University of Technology, SE-971 87, Luleå, Sweden;2. Fibre and Particle Engineering, University of Oulu, FI-91400, Oulu, Finland;1. School of Physics and Astronomy, University of Leeds, Leeds LS2 9JT, UK;2. Department of Materials Engineering, KU Leuven, Kasteelpark Arenberg 44, B-3001 Leuven, Belgium;1. Zhejiang Provincial Key Laboratory of Robotics and Intelligent Manufacturing Equipment Technology, Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo 315201, China;2. University of Chinese Academy of Sciences, Beijing, No.19 (A) Yuquan Road, Shijingshan District, Beijing 100049, China |
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| Abstract: | The inherent brittleness and poor thermal resistance of poly(lactic acid) (PLA) are two main challenges toward a wider industrial application of this bioplastic. In the present work, through the development of self-reinforced PLA (SR-PLA) or “all-PLA” composites, the high brittleness and low heat deflection temperature (HDT) of PLA have been overcome, while simultaneously improving the tensile strength and modulus of SR-PLA. The obtained composites are fully biobased, recyclable and under the right conditions compostable. For the creation of SR-PLA composites, first a tape extrusion process was optimized to ensure superior mechanical properties. The results show that SR-PLA composites exhibited enhanced moduli (2.5 times) and tensile strengths (2 times) and showed 14 times increase in impact energy compared to neat PLA. Finally, the HDT of SR-PLA was also increased by about 26 °C compared to neat PLA, mainly as a result of an increase in modulus and crystallinity. |
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| Keywords: | A Tape A Recycling B Mechanical properties Self-reinforced polymer composites |
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