Abstract
This study investigates the recycling process of plastic mixture wastes of polyamide/polypropylene/polyethylene (PA/PP/PE) from the food packaging sector to produce composite materials. The production is a two-step process where composite pellets were first prepared by compounding the plastic wastes with short glass fibers (SGF) (7–40 wt%) and maleic anhydride grafted polypropylene (PPgMAH) (3–6 wt%) as a coupling agent using a twin screw extruder. The composite pellets were then injection molded to produce composite materials for different commercial and engineering applications. Rheological tests showed the importance of adding PPgMAH as compatibilizer during twin screw compounding. The use of 3 wt% of PPgMAH increases the viscosity of the extruded blends at low frequencies and consequently the mechanical properties of the composite material. Furthermore, the DSC results indicate that using PPgMAH as a coupling agent increases the nucleating role of the SGF by effectively distributing the fibers inside the matrix. Morphological results showed that the fibers have a good size distribution and were evenly distributed in the matrix with a good fiber–matrix adhesion. Tensile, flexural and impact results showed that SGF obviously improves the tensile strength and the tensile modulus of the recycled composite material.
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Meran, C., Ozturk, O., Yuksel, M.: Examination of the possibility of recycling and utilizing recycled polyethylene and polypropylene. Mater. Des. 29(3), 701–705 (2008)
Dorigato, A., Fambri, L.: Thermo-mechanical behavior of polyamide 12-polyamide 66 recycled fiber composites. Polym. Compos. 32(5), 786–795 (2011)
Lingesh, B.V., Rudresh, B.M., Ravikumar, B.N.: Effect of short glass fibers on mechanical properties of polyamide66 and polypropylene (PA66/PP) thermoplastic blend composites. Proced. Mater. Sci. 5, 1231–1240 (2014)
Satapathy, S., Chattopadhyay, S., Chakrabarty, K.K., Nag, A., Tiwari, K.N., Tikku, V.K., et al.: Studies on the effect of electron beam irradiation on waste polyethylene and its blends with virgin polyethylene. J. Appl. Polym. Sci. 101(1), 715–726 (2006)
Çuvalci, H., Erbay, K., İpek, H.: Investigation of the effect of glass fiber content on the mechanical properties of cast polyamide. Arab. J. Sci. Eng. 39(12), 9049–9056 (2014)
Zgheib, N., Seif, S., Tahan, D., El Hajj, N.: Influence of processing parameters on the tensile strength of PA-W/mLLDPE composite films produced by blown film extrusion. In: Proc First Int Conf Energy Power Pet Petrochem Eng E3PE 2017 Fac Eng - Leban Univ Beirut, Lebanon (2017)
de Oliveira, A.D., de Castro, L.D.C., Beatrice, C.A.G., de Lucas, A., Pessan, L.A.: Effect of maleic anhydride content in properties of PA6/AES blends compatibilized with MMA-MA. Mater. Res. 20(6), 1630–1637 (2017)
Kudva, R.A., Keskkula, H., Paul, D.R.: Properties of compatibilized nylon 6/ABS blends. Polymer 41(1), 239–258 (2000)
Darshan, R., Lingesh, B.V., Reddappa, H.N., Ravi Kumar, B.N.: Effects of SGF on physical and mechanical properties of PA66/PP blend composites. JETIR 2(10), 9–15 (2015)
Novello, M.V., Carreira, L.G., Canto, L.B.: Post-consumer polyethylene terephthalate and polyamide 66 blends and corresponding short glass fiber reinforced composites. Mater. Res. 17(5), 1285–1294 (2014)
Lin, J.-H., Huang, C.-L., Liu, C.-F., Chen, C.-K., Lin, Z.-I., Lou, C.-W.: Polypropylene/short glass fibers composites: effects of coupling agents on mechanical properties, thermal behaviors, and morphology. Materials 8(12), 8279–8291 (2015)
Varga, J.: Polypropylene Structure, Blends and Composites. Chapman & Hall, London (1995)
Wunderlich, B.: Macromolecular Physics: Crystal Melting. Academic Press, New York (1971)
Lobo, H.: (ed.) Handbook on Plastics Analysis. Marcel Dekker, New York (2003)
Acknowledgements
This work has been funded by Indevco PACT (Polymer Application Center for Technology) R&D Center and by LIRA program. We give special thanks to Dr. Roland Habchi from the Lebanese University and Dr. Jihad Reshmani from Balamand University for their help in the experimental tests.
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El Hajj, N., Seif, S., Saliba, K. et al. Recycling of Plastic Mixture Wastes as Carrier Resin for Short Glass Fiber Composites. Waste Biomass Valor 11, 2261–2271 (2020). https://doi.org/10.1007/s12649-018-0446-z
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DOI: https://doi.org/10.1007/s12649-018-0446-z