Thermal and Physical Performance of Recycled PET and EPS at Different Recycling Levels

Cahyo Budiyantoro; Aziz Wahyu Alfansyah; Aris Widyo Nugroho

doi:10.55927/fjmr.v4i3.119

Authors

Cahyo Budiyantoro Universitas Muhammadiyah Yogyakarta
Aziz Wahyu Alfansyah Universitas Muhammadiyah Yogyakarta
Aris Widyo Nugroho Universitas Muhammadiyah Yogyakarta

DOI:

https://doi.org/10.55927/fjmr.v4i3.119

Keywords:

Recycling Number, PET, EPS, Thermal Properties, Flowability

Abstract

The continuous increase in waste production, driven by economic growth and population expansion in Indonesia, highlights the urgent need for a deeper understanding of sustainable waste management practices. This study aims to analyze the impact of different recycling levels on the thermal and physical properties of polyethylene terephthalate (PET) and expanded polystyrene (EPS), both of which significantly contribute to environmental pollution. This research examines recycling frequencies of one, three, and five cycles, utilizing advanced testing methodologies such as Differential Scanning Calorimetry (DSC) for thermal property analysis and Melt Flow Index (MFI) for physical characterization. The study seeks to uncover the structural transformations that occur in these plastics throughout successive recycling processes and their subsequent implications. The PET test results indicate that an increased recycling frequency tends to elevate the melting point, reduce crystallinity, and enhance melt flowability.

References

Acierno, S., Carotenuto, C., & Pecce, M. (2010). Compressive and thermal properties of recycled EPS foams. Polymer - Plastics Technology and Engineering, 49(1), 13–19. https://doi.org/10.1080/03602550903282994

Aljabri, N. M., Lai, Z., Hadjichristidis, N., & Huang, K. W. (2017). Renewable aromatics from the degradation of polystyrene under mild conditions. Journal of Saudi Chemical Society, 21(8), 983–989. https://doi.org/10.1016/j.jscs.2017.05.005

Andena, L., Caimmi, F., Leonardi, L., Nacucchi, M., & De Pascalis, F. (2019). Compression of polystyrene and polypropylene foams for energy absorption applications: A combined mechanical and microstructural study. Journal of Cellular Plastics, 55(1), 49–72. https://doi.org/10.1177/0021955X18806794

Ankesh, S., Jaikant, K., & Sanjeev, G. (2021). Properties of Expanded Polystyrene (EPS) and Its Environmental Effects. Advances and Applications in Mathematical Sciences, 20(10), 2151–2162.

Budiyantoro, C., Sosiati, H., Nugroho, A., & Anggariawan, A. (2019). Thermal Characterization of Mixed Virgin-Recycle Acrylonitrile Butadiene Styrene. JMPM (Jurnal Material Dan Proses Manufaktur), 3(2), 83–89. https://doi.org/10.18196/jmpm.3241

Budiyantoro, C., & Yudhanto, F. (2023). Enhancing Mechanical Properties of Waste Expanded Polystyrene Composites through Varied Coupling Agents and Wood Powder Formulations. Mechanical Engineering Department, 1–11.

Bustos Seibert, M., Mazzei Capote, G. A., Gruber, M., Volk, W., & Osswald, T. A. (2022). Manufacturing of a PET Filament from Recycled Material for Material Extrusion (MEX). Recycling, 7(5). https://doi.org/10.3390/recycling7050069

Cusano, I., Campagnolo, L., Aurilia, M., Costanzo, S., & Grizzuti, N. (2023). Rheology of Recycled PET. Materials, 16(9), 1–23. https://doi.org/10.3390/ma16093358

Dennis, R., & Dennis, W. (2022). Styrofoam Recycling : Relaxation- Densification of EPS by solar heat. 3(3), 1–14.

Fernandes, E. M., Correlo, V. M., Mano, J. F., & Reis, R. L. (2014). Polypropylene-based cork-polymer composites: Processing parameters and properties. Composites Part B: Engineering, 66, 210–223. https://doi.org/10.1016/j.compositesb.2014.05.019

Hadi, A. J., Najmuldeen, G. F., & Ahmed, I. (2014). Quality Restoration Of Waste Polyolefin Plastic Material Through The Dissolution–Reprecipitation Technique. Chemical Industry and Chemical Engineering Quarterly, 20(2), 163–170. https://doi.org/10.2298/CICEQ120526119H

Hidalgo-Crespo, J., Moreira, C. M., Jervis, F. X., Soto, M., Amaya, J. L., & Banguera, L. (2022). Circular economy of expanded polystyrene container production: Environmental benefits of household waste recycling considering renewable energies. Energy Reports, 8, 306–311. https://doi.org/10.1016/j.egyr.2022.01.071

Ho, C. C. K. (2017). Abutment selection. Practical Procedures in Aesthetic Dentistry, 308–313. https://doi.org/10.1002/9781119324911.ch11.2

Jakić, M., Perinović Jozić, S., Bandić, I., & Ključe, L. (2023). Recycling of PET Post-consumer Bottles: Effect of the Re-extrusion Process on the Structure, Thermal Properties, and Apparent Activation Energy. Kemija u Industriji, 72(5–6), 381–388. https://doi.org/10.15255/kui.2022.072

Junaedi, H., Baig, M., Dawood, A., Albahkali, E., & Almajid, A. (2022). Effect of the Matrix Melt Flow Index and Fillers on Mechanical Properties of Polypropylene-Based Composites. Materials, 15(21). https://doi.org/10.3390/ma15217568

Masmoudi, F., Fenouillot, F., Mehri, A., Jaziri, M., & Ammar, E. (2018). Characterization and quality assessment of recycled post-consumption poly(ethylene terephthalate) (PET). Environmental Science and Pollution Research, 25(23), 23307–23314. https://doi.org/10.1007/s11356-018-2390-7

Nafis, Z. A. S., Nuzaimah, M., Kudus, S. I. A., Yusuf, Y., Ilyas, R. A., Knight, V. F., & Norrrahim, M. N. F. (2023). Effect of Wood Dust Fibre Treatments Reinforcement on the Properties of Recycled Polypropylene Composite (r-WoPPC) Filament for Fused Deposition Modelling (FDM). Materials, 16(2). https://doi.org/10.3390/ma16020479

Nik Hassan, N. R., Ismail, N. M., Ghazali, S., & Nuruzzaman, D. M. (2018). Thermal properties of polyethylene reinforced with recycled-poly (ethylene terephthalate) flakes. IOP Conference Series: Materials Science and Engineering, 342(1). https://doi.org/10.1088/1757-899X/342/1/012094

Pereira, A. L., Banea, M. D., Neto, J. S. S., & Cavalcanti, D. K. K. (2020). Mechanical and thermal characterization of natural intralaminar hybrid composites based on sisal. Polymers, 12(4). https://doi.org/10.3390/POLYM12040866

Piccarolo, S., Brucato, V., & Balta, F. J. (2002). Role of thermal history on quiescent cold crystallization of PET. 43, 4487–4493.

Roungpaisan, N., Srisawat, N., Rungruangkitkrai, N., Chartvivatpornchai, N., Boonyarit, J., Kittikorn, T., & Chollakup, R. (2023). Effect of Recycling PET Fabric and Bottle Grade on r-PET Fiber Structure. Polymers, 15(10). https://doi.org/10.3390/polym15102330

Samper, M. D., Garcia-Sanoguera, D., Parres, F., & López, J. (2010). Recycling of expanded polystyrene from packaging. Progress in Rubber, Plastics and Recycling Technology, 26(2), 83–92. https://doi.org/10.1177/147776061002600202

Waste Diversion Ontario. (2018). Densification and Recycling of Post Consumer Polystyrene (PS #6) Packaging in Ontario Municipalities: Feasibility of Mobile PS Recycling System and Other Processing Opportunities.

Zhu, J., Xu, Q., Ren, Q., & Liu, X. (2013). Study on the crystallization of poly(ethylene terephthalate)/SiO 2/TiO2 hybrid nanocomposites by sol-gel method. Asian Journal of Chemistry, 25(16), 9174–9178. https://doi.org/10.14233/ajchem.2013.15142