Effects of HDPE-g-MAH on Mechanical and Thermal Properties of Recycled rPET/rHDPE Blends

Abstract:

Nowadays, environmentally conscious manufacturers make their products from partly or fully recycled materials. However, recycling of polymer blends can be difficult. In immiscible polymer blends, the components often contain reactive functional groups, therefore polymers with reactive functional groups can be used as reactive compatibilizers. I investigated the mechanical, thermal, and morphological properties of different recycled rPET/rHDPE blends. I used an anhydride modified polyethylene (HDPE-g-MAH) as a compatibilizer. I found that without compatibilizer, the elongation at break decreased with the increase of rHDPE. As the amount of compatibilizer increases, the elongation at break is gradually increased. Furthermore, based on the SEM images, it can be observed that the size of the dispersed rHDPE phase in the rPET matrix decreased with the addition of a compatibilizer, and the dispersion of the dispersed phase also improved.

• Periodical: Solid State Phenomena (Volume 371)
• Pages: 15-24
• DOI: https://doi.org/10.4028/p-PqV48f
• Online since: May 2025
• Authors: Dániel Gere*
• Keywords: Circular Economy, Compatibilization, Polymer Blend, Recycling, Waste Management

References

[1] PlasticsEurope, Plastics – the Facts 2022, PlasticsEurope AISBL, Brussels, 2022.

[2] PlasticsEurope, Plastics – the Facts 2023, PlasticsEurope AISBL, Brussels, 2023.

[3] F. Ronkay, B. Molnár, D. Gere, T. Czigány, Plastic waste from marine environment: Demonstration of possible routes for recycling by different manufacturing technologies, Waste Management. 119 (2021) 101-110.

DOI: 10.1016/j.wasman.2020.09.029

[4] R. Geyer, J.R. Jambeck, K.L. Law, Production, use, and fate of all plastics ever made, Science Advances. 3 (2017) e1700782.

DOI: 10.1126/sciadv.1700782

[5] F. Ronkay, D. Gere, E. Slezák, E. Szabó, G. Marosi, K. Bocz, Recycled PET packaging materials of improved toughness— Importance of devitrification of the rigid amorphous fraction, Macromolecular Materials and Engineering. (2024) 2400219.

DOI: 10.1002/mame.202400219

[6] P. van den Tempel, F. Picchioni, Polymer recycling: A comprehensive overview and future outlook, Recycling. 10 (2025) 1-34.

DOI: 10.3390/recycling10010001

[7] V.S. Cecon, G.W. Curtzwiler, K.L. Vorst, A study on recycled polymers recovered from multilayer plastic packaging films by solvent-targeted recovery and precipitation (STRAP), Macromolecular Materials and Engineering. 307 (2022) 2200346.

DOI: 10.1002/mame.202200346

[8] T. Li, G. Theodosopoulos, C. Lovell, A. Loukodimou, K.K. Maniam, S. Paul, Progress in solvent-based recycling of polymers from multilayer packaging, Polymers. 16 (2024) 1670.

DOI: 10.3390/polym16121670

[9] D. Gere, T. Czigány, Future trends of plastic bottle recycling: Compatibilization of PET and PLA, Polymer Testing. 81 (2020) 106160.

DOI: 10.1016/j.polymertesting.2019.106160

[10] J. Maris, S. Bourdon, J.-M. Brossard, L. Cauret, L. Fontaine, V. Montembault, Mechanical recycling: Compatibilization of mixed thermoplastic wastes, Polymer Degradation and Stability. 147 (2018) 245-266.

DOI: 10.1016/j.polymdegradstab.2017.11.001

[11] A. Dorigato, Recycling of polymer blends, Advanced Industrial and Engineering Polymer Research. 4 (2021) 53-69.

DOI: 10.1016/j.aiepr.2021.02.005

[12] R. Muthuraj, M. Misra, A.K. Mohanty, Biodegradable compatibilized polymer blends for packaging applications: A literature review, Journal of Applied Polymer Science. 135 (2018) 45726.

DOI: 10.1002/app.45726

[13] H. Zhang, W. Guo, Y. Yu, B. Li, C. Wu, Structure and properties of compatibilized recycled poly(ethylene terephthalate)/linear low density polyethylene blends, European Polymer Journal. 43 (2007) 3662-3670.

DOI: 10.1016/j.eurpolymj.2007.05.001

[14] S.K. Taghavi, H. Shahrajabian, H.M. Hosseini, Detailed comparison of compatibilizers MAPE and SEBS-g-MA on the mechanical/thermal properties, and morphology in ternary blend of recycled PET/HDPE/MAPE and recycled PET/HDPE/SEBS-g-MA, Journal of Elastomers & Plastics. 50 (2017) 13-35.

DOI: 10.1177/0095244317698738

[15] R.S. Chen, M.H. Ab Ghani, M.N. Salleh, S. Ahmad, S. Gan: Influence of blend composition and compatibilizer on mechanical and morphological properties of recycled HDPE/PET blends, Materials Sciences and Applications. 5 (2014) 943-952.

DOI: 10.4236/msa.2014.513096

[16] M. Kaci, A. Benhamida, S. Cimmino, C. Silvestre, C. Carfagna, Waste and virgin LDPE/PET blends compatibilized with an ethylene-butyl acrylate-glycidyl methacrylate (EBAGMA) Terpolymer, 1., Macromolecular Materials and Engineering. 290 (2005) 987-995.

DOI: 10.1002/mame.200500217