Future trends of plastic bottle recycling: Compatibilization of PET and PLA |
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| Institution: | 1. Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Łódź, Poland;2. International Institute for Nanocomposites Manufacturing, WMG, University of Warwick, CV4 7AL, UK;1. Department of Materials Science and Engineering, Faculty of Engineering and Industrial Technology, Silpakorn University, Nakhon Pathom 73000, Thailand;2. Center of Excellence on Petrochemical and Materials Technology, Chulalongkorn University, Bangkok 10330, Thailand;1. Dipartimento di Scienze, Università Roma Tre, 00146, Roma, Italy;2. Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma 1, 00143, Roma, Italy;1. National Metal and Materials Technology Center, National Science and Technology Development Agency, Pathumthani 12120, Thailand;2. Department of Chemical Engineering, Faculty of Engineering, Kasetsart University, Bangkok 10900, Thailand;3. Department of Chemical Engineering, Faculty of Engineering, Srinakharinwirot University, Nakornnayok 26120, Thailand;1. School of Mechanical Engineering, Nanjing University of Science and Technology, 210094 Nanjing, China;2. Department of Mechanical and Mechatronics Engineering, University of Waterloo, Waterloo, ON N2L3G1, Canada |
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| Abstract: | We improved the recyclability of mixed poly(ethylene-terephthalate) (PET) and poly(lactic acid) (PLA) bottle waste. We made uncompatibilized and compatibilized PET/PLA blends of different weight ratios with a twin-screw extruder. Then, we analysed the mechanical properties, the miscibility and the thermal stability of the blends with and without compatibilizers. From the change in intrinsic viscosities (IV), we concluded that different reactions occur between the polymer chains due to the compatibilizers. We observed that when ethylene-butyl acrylate-glycidyl methacrylate (E-BA-GMA) as compatibilizer was added, the blends became tougher; elongation at break and Charpy impact strength increased, but Young's modulus of the blends decreased. In addition, the compatibilizers improved the thermal stability of the blends and this may have been caused by a number of mechanisms. |
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| Keywords: | Recycling Poly(ethylene-terephthalate) Poly(lactic acid) Blends Compatibilization |
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