Eco-friendly solution: composites made of recycled polypropylene modified with thermoplastics and dispersed fillers
Abstract
A comprehensive solution to the problems of sustainable development, chemical safety and cyclical economy can be found, to a large extent, in the processing of sorted recycled polymers which is relevant in scientific and practical terms. The article presents the results of the first study of polymer mixtures based on domestically produced materials, namely, recycled polypropylene (recPP) obtained from sorted industrial solid waste, with thermoplastic elastomers (TPE) of two types: polyolefin and styrene based copolymers (5–10% wt of recPP) as well as compositions prepared from these mixtures and highly dispersed filler in the form of an active dispersed-devulcanized rubber powder of worn-out tires and rubber crumb of gas masks (2% wt of recPP). The studied samples of mixtures have been obtained by extrusion and heat pressing. Good compatibility of recPP and TPE is observed in the studied range of compositions during processing of polymer mixtures under shear deformation by extrusion. The properties of the resulting mixtures have been studied using a combination of physicochemical analysis methods (Fourier-IR spectroscopy, differential scanning calorimetry, and thermogravimetric analysis), and the stress-elongation dependences have been determined. No evidence of chemical interaction between the components of the studied polymer mixtures is revealed. It has been shown that the copolymers of ethylene-octene and styrene-ethylene-butylene-styrene proposed for modification of recPP caused the plasticization of the recPP due to a decrease in the degree of crystallinity, while TEPs perform the function of compatibilizers in the preparation of composites after introducing into the mixture a highly dispersed filler such as rubber powder derived from used gas masks and devulcanized tire rubber.
References
Domingues, J., Marques, T., Mateus, A., Carreira, P., & Malca, C. (2017). An additive manufacturing solution to produce big green parts from tires and recycled plastics. Procedia Manufacturing, 12, 242 - 248. https://doi.org/10.1016/j.promfg.2017.08.028
Okan, M., Aydin, H.M., & Barsbay, M. (2019). Current approaches to waste polymer utilization and minimization: a review. Journal of Chemical Technology and Biotechnology, 94(1), 8 - 21. https://doi.org/10.1002/jctb.5778
Sienkiewicz, M., Janik, H., Borzędowska-Labuda, K., & Kucińska-Lipka, J. (2017). Environmentally friendly polymer-rubber composites obtained from waste tyres: A review. Journal of Cleaner Production, 147, 560 - 571. https://doi.org/10.1016/j.jclepro.2017.01.121
Grigoryeva, O.P., Fainleib, A.M., Tolstov, A.L., Starostenko, O.M., & Karger-Kocsis, J. (2005). Journal of Applied Polymer Science, 95(3), 659 - 671. https://doi.org/10.1002/app.21177
Holden, G., Kricheldorf, H.R., & Quirk, R.P. (2004). Thermoplastic Elastomers. 3rd Ed. Hanser Gardner Publications.
Paul D.R., & Bucknall, C.B. (2000). Polymer blends: formulation and performance. New York: Wiley.
Luo, T., & Isayev, A.I. (1998). Rubber/plastic blends based on devulcanized ground tire rubber. Journal of Elastomers & Plastics, 30(2), 133 - 160. https://doi.org/10.1177/009524439803000204
Bazunova, M.V., Ishyarova, G.R., Sharipova, G.M., & Zakharov, V.P. (2018). Investigation of the possibility of using secondary polypropylene in composite materials. Doklady Bashkirskogo Universiteta = Reports of Bashkir University, 3(1), 16 - 28 (in Russ.).
Trofimenko, Yu.V., Vorontsov, Yu.M., & Trofimenko, K.Yu. (2014). Recycling and use of worn tires. Tverdye bytovye otkhody = Municipal Solid waste, 3(93), 42 – 49 (in Russ.).
Lebedev, A.N., Klindukhov, N.S., Lebedev, S.A., & Ovchinnikova, I.V. (2009). Technical-and-economic and ecological problems of used tyre recycling. Ekologia promyslennogo proizvodstva = Industrial ecology, 3, 50 - 54 (in Russ.).
Pat. 2697865, Russian Federation, 2019.
Moiseev, V.V. (1985). Thermoplastics. M.: Khimiya (in Russ.).
https://rusplast.com/catalog/poliolefinovyy-elastomer-poe-poe/18595/ (accessed 25.09.2020).
https://rusplast.com/catalog/butadiene-tec-injection-brand/13789/ (accessed 25.09.2020).
Nikolsky, V.G. (1999). Rubber powders with high chemical activity: preparation, structure, properties. Proceedings of scientific conference of Institute of Chemical Physics of Russian Academy of Sciences. М.: Semenov Institute of Chemical Physics RAS. P. 29 (in Russ.).
Nikolsky, V.G. (2002). Modern technologies for processing worn tires and other rubber waste. Vtorichnye resursy = Secondary resources, 1, 48 (in Russ.).
Copyright (c) 2020 Vera V. Myasoedova , and Anna V. Lushkova
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