{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,30]],"date-time":"2026-06-30T03:36:28Z","timestamp":1782790588510,"version":"3.54.5"},"reference-count":44,"publisher":"MDPI AG","issue":"1","license":[{"start":{"date-parts":[[2022,12,26]],"date-time":"2022-12-26T00:00:00Z","timestamp":1672012800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100000038","name":"Natural Science and Engineering Research Council of Canada","doi-asserted-by":"publisher","award":["RGPIN-2016-05958"],"award-info":[{"award-number":["RGPIN-2016-05958"]}],"id":[{"id":"10.13039\/501100000038","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Recycling"],"abstract":"<jats:p>The mechanical properties of virgin\/recycled high-density polyethylene (HDPE) blends over the complete concentration range was thoroughly investigated in this work. In particular, a focus was made on the long-term properties via mechanical fatigue. Two different mixing methods, namely powder mixing (dry blending) and extrusion mixing (melt blending), were used to determine the effect of processing conditions on the tensile and fatigue behavior of the blends after compression molding. It was found that both tensile (modulus, ultimate strength) and fatigue performances were improved with increasing vHDPE content. Based on the obtained data, a correlation between the blends composition and mechanical properties is reported. Moreover, it was observed that increasing the vHDPE content led to slower crack propagation rate, probably due to less defects (contamination) in the blends. Finally, a negligible difference in mechanical properties (fatigue resistance) between both mixing approaches was observed, but samples produced via powder mixing showed less viscous dissipation (heat generation) as the vHDPE content increased, leading to lower surface temperature rise which can be an advantage for specific applications.<\/jats:p>","DOI":"10.3390\/recycling8010002","type":"journal-article","created":{"date-parts":[[2022,12,27]],"date-time":"2022-12-27T03:03:31Z","timestamp":1672110211000},"page":"2","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":45,"title":["Blending Recycled High-Density Polyethylene HDPE (rHDPE) with Virgin (vHDPE) as an Effective Approach to Improve the Mechanical Properties"],"prefix":"10.3390","volume":"8","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4913-2584","authenticated-orcid":false,"given":"Jian","family":"Zhang","sequence":"first","affiliation":[{"name":"Department of Chemical Engineering and CERMA, Universit\u00e9 Laval, 1065 Avenue de la M\u00e9decine, Quebec, QC G1V 0A6, Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8752-930X","authenticated-orcid":false,"given":"Valerian","family":"Hirschberg","sequence":"additional","affiliation":[{"name":"Institute for Chemical Technology and Polymer Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstra\u00dfe 18, 76131 Karlsruhe, BW, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3969-2847","authenticated-orcid":false,"given":"Denis","family":"Rodrigue","sequence":"additional","affiliation":[{"name":"Department of Chemical Engineering and CERMA, Universit\u00e9 Laval, 1065 Avenue de la M\u00e9decine, Quebec, QC G1V 0A6, Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2022,12,26]]},"reference":[{"key":"ref_1","unstructured":"Environment and Climate Change Canada (2019). Economic Study of the Canadian Plastic Industry, Markets and Waste: Summary Report to Environment and Climate Change Canada."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"106363","DOI":"10.1016\/j.resconrec.2022.106363","article-title":"Quantification and Evaluation of Plastic Waste in the United States","volume":"183","author":"Milbrandt","year":"2022","journal-title":"Resour. Conserv. Recycl."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"374","DOI":"10.1038\/s41558-019-0459-z","article-title":"Strategies to Reduce the Global Carbon Footprint of Plastics","volume":"9","author":"Zheng","year":"2019","journal-title":"Nat. Clim. Chang."},{"key":"ref_4","unstructured":"(2022, July 29). SDG\u2014SDG Indicators, Available online: https:\/\/unstats.un.org\/sdgs\/report\/2021\/goal-13\/."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"2000415","DOI":"10.1002\/marc.202000415","article-title":"Mechanical Recycling of Packaging Plastics: A Review","volume":"42","author":"Schyns","year":"2021","journal-title":"Macromol. Rapid Commun."},{"key":"ref_6","doi-asserted-by":"crossref","unstructured":"Vidakis, N., Petousis, M., and Maniadi, A. (2021). Sustainable Additive Manufacturing: Mechanical Response of High-Density Polyethylene over Multiple Recycling Processes. Recycling, 6.","DOI":"10.3390\/recycling6010004"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"2262","DOI":"10.1016\/j.polymdegradstab.2012.07.039","article-title":"The Effect of Extensive Mechanical Recycling on the Properties of Low Density Polyethylene","volume":"97","author":"Jin","year":"2012","journal-title":"Polym. Degrad. Stab."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"25","DOI":"10.1016\/j.jenvman.2017.05.020","article-title":"Effect of Simulated Mechanical Recycling Processes on the Structure and Properties of Poly(Lactic Acid)","volume":"216","author":"Lorenzo","year":"2018","journal-title":"J. Environ. Manag."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"2607","DOI":"10.1023\/A:1017983907260","article-title":"Effects of Recycling on the Microstructure and the Mechanical Properties of Isotactic Polypropylene","volume":"36","author":"Aurrekoetxea","year":"2001","journal-title":"J. Mater. Sci."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"e53312","DOI":"10.1002\/app.53312","article-title":"Mechanical Fatigue of Recycled and Virgin High-\/Low-density Polyethylene","volume":"140","author":"Zhang","year":"2022","journal-title":"J. Appl. Polym. Sci."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"707","DOI":"10.1016\/j.chemosphere.2018.06.095","article-title":"Solvent-Based Separation and Recycling of Waste Plastics: A Review","volume":"209","author":"Zhao","year":"2018","journal-title":"Chemosphere"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"201","DOI":"10.1007\/b94173","article-title":"Recycled Polyolefins. Material Properties and Means for Quality Determination","volume":"Volume 169","author":"Albertsson","year":"2004","journal-title":"Long Term Properties of Polyolefins. Advances in Polymer Science"},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"101","DOI":"10.1365\/s10337-003-0133-4","article-title":"Quality Assessments of Recycled Plastics by Spectroscopy and Chromatography","volume":"59","author":"Stangenberg","year":"2004","journal-title":"Chromatographia"},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"411","DOI":"10.1002\/macp.1979.021800215","article-title":"Effects of Mechanical Stress on the Reactivity of Polymers: Shear Degradation of Polyacrylamide and Dextran","volume":"180","author":"Basedow","year":"1979","journal-title":"Macromol. Chem. Phys."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"3494","DOI":"10.1021\/acssuschemeng.9b06635","article-title":"Degradation Rates of Plastics in the Environment","volume":"8","author":"Chamas","year":"2020","journal-title":"ACS Sustain. Chem. Eng."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"2587","DOI":"10.1007\/s13202-020-00905-5","article-title":"Shear Degradation Model of HPAM Solutions for the Design of Regulator Valves in Polymer Flooding EOR","volume":"10","author":"Prada","year":"2020","journal-title":"J. Pet. Explor. Prod. Technol."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"445","DOI":"10.1016\/j.polymdegradstab.2004.05.016","article-title":"The Role of Chain Scission and Chain Branching in High Density Polyethylene during Thermo-Mechanical Degradation","volume":"86","author":"Pinheiro","year":"2004","journal-title":"Polym. Degrad. Stab."},{"key":"ref_18","unstructured":"Goecke, A. (2022). Rheological Investigation of Mechanically Recycled PE and Investigation of PE Pyrolysis Condensates with a 1 H-NMR Spectrometer. [Master Thesis, Karlsruhe Institute of Technology]."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"11","DOI":"10.1016\/j.polymdegradstab.2017.05.005","article-title":"The Effect of Thermal and Thermo-Oxidative Degradation Conditions on Rheological, Chemical and Thermal Properties of HDPE","volume":"141","author":"Cuadri","year":"2017","journal-title":"Polym. Degrad. Stab."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"77","DOI":"10.1016\/S0141-3910(96)00230-3","article-title":"Recycling of High Density Polyethylene Containers","volume":"57","author":"Loultcheva","year":"1997","journal-title":"Polym. Degrad. Stab."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"16","DOI":"10.1016\/j.matdes.2017.05.043","article-title":"A Simplified Moment Model for Prediction of Long-Chain Branching during Peroxide Modification of HDPE","volume":"130","author":"Abedini","year":"2017","journal-title":"Mater. Des."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"1525","DOI":"10.1002\/app.13024","article-title":"Degradation of Polyethylene during Extrusion. II. Degradation of Low-Density Polyethylene, Linear Low-Density Polyethylene, and High-Density Polyethylene in Film Extrusion","volume":"91","author":"Andersson","year":"2004","journal-title":"J. Appl. Polym. Sci."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"133","DOI":"10.1016\/j.polymdegradstab.2015.01.012","article-title":"Processability and Mechanical Properties of Extensively Recycled High Density Polyethylene","volume":"114","author":"Oblak","year":"2015","journal-title":"Polym. Degrad. Stab."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"981","DOI":"10.1002\/app.1993.070480605","article-title":"Crosslinking of HDPE during Reactive Extrusion: Rheology, Thermal, and Mechanical Properties","volume":"48","author":"Kim","year":"1993","journal-title":"J. Appl. Polym. Sci."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"75","DOI":"10.1016\/j.wasman.2019.07.005","article-title":"Closing the Loop for PET, PE and PP Waste from Households: Influence of Material Properties and Product Design for Plastic Recycling","volume":"96","author":"Eriksen","year":"2019","journal-title":"Waste Manag."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"2456","DOI":"10.1016\/j.wasman.2007.10.021","article-title":"Modification of Mechanical Properties of Recycled Polypropylene from Post-Consumer Containers","volume":"28","author":"Brachet","year":"2008","journal-title":"Waste Manag."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"1489","DOI":"10.1016\/j.polymdegradstab.2011.05.005","article-title":"The Effects of Reprocessing Cycles on the Structure and Properties of Polystyrene\/Cloisite15A Nanocomposites","volume":"96","author":"Remili","year":"2011","journal-title":"Polym. Degrad. Stab."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"87","DOI":"10.1016\/j.polymdegradstab.2015.12.013","article-title":"Reprocessability of High Impact Polystyrene\/Clay Nanocomposites in Extrusion","volume":"125","author":"Nunes","year":"2016","journal-title":"Polym. Degrad. Stab."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"759","DOI":"10.1002\/(SICI)1097-4628(19960131)59:5<759::AID-APP1>3.0.CO;2-V","article-title":"Processing and Mechanical Properties of Recycled PVC and of Homopolymer Blends with Virgin PVC","volume":"59","year":"1996","journal-title":"J. App. Polym. Sci."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"274","DOI":"10.1002\/mame.200700393","article-title":"Quality Concepts for the Improved Use of Recycled Polymeric Materials: A Review","volume":"293","author":"Vilaplana","year":"2008","journal-title":"Macromol. Mater. Eng."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"3696","DOI":"10.1002\/app.23214","article-title":"Compatibility of HDPE\/Postconsumer HDPE Blends Using Compatibilizing Agents","volume":"100","year":"2006","journal-title":"J. Appl. Polym. Sci."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"509","DOI":"10.1515\/polyeng-2021-0065","article-title":"Use of Virgin\/Recycled Polyethylene Blends in Rotational Moulding","volume":"41","author":"Cestari","year":"2021","journal-title":"J. Polym. Eng."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"3103","DOI":"10.1016\/j.matpr.2022.03.385","article-title":"Evaluation of Tensile and Flexural Strength Properties of Virgin and Recycled High-Density Polyethylene (HDPE) for Pipe Fitting Application","volume":"62","author":"Tesfaw","year":"2022","journal-title":"Mater. Today. Proc."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"115","DOI":"10.1179\/1743289812Y.0000000042","article-title":"Highly Filled Thermoplastic Elastomers from Ground Tire Rubber, Maleated Polyethylene and High Density Polyethylene","volume":"42","author":"Kakroodi","year":"2013","journal-title":"Plast. Rubber Compos."},{"key":"ref_35","first-page":"897","article-title":"Strain-Based Criterion for Uniaxial Fatigue Life Prediction for an SBR Rubber: Comparative Study and Development","volume":"234","author":"Hamdi","year":"2020","journal-title":"Proc. Inst. Mech. Eng. L J. Mater. Des. Appl."},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1016\/j.polymer.2018.01.042","article-title":"Influence of Molecular Properties on the Mechanical Fatigue of Polystyrene (PS) Analyzed via W\u00f6hler Curves and Fourier Transform Rheology","volume":"138","author":"Hirschberg","year":"2018","journal-title":"Polymer"},{"key":"ref_37","first-page":"7","article-title":"Phase Morphology, Mechanical, and Thermal Properties of Fiber-Reinforced Thermoplastic Elastomer: Effects of Blend Composition and Compatibilization","volume":"2022","author":"Fazli","year":"2019","journal-title":"J. Reinf. Plast. Compos."},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"106798","DOI":"10.1016\/j.ijfatigue.2022.106798","article-title":"Mechanical Fatigue of Biodegradable Polymers: A Study on Polylactic Acid (PLA), Polybutylene Succinate (PBS) and Polybutylene Adipate Terephthalate (PBAT)","volume":"159","author":"Zhang","year":"2022","journal-title":"Int. J. Fatigue"},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"343","DOI":"10.1016\/j.polymertesting.2017.04.001","article-title":"Fatigue Behavior of Polystyrene (PS) Analyzed from the Fourier Transform (FT) of Stress Response: First Evidence of I2\/1(N) and I3\/1(N) as New Fingerprints","volume":"60","author":"Hirschberg","year":"2017","journal-title":"Polym. Test"},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"46634","DOI":"10.1002\/app.46634","article-title":"Fatigue Life Prediction via the Time-Dependent Evolution of Linear and Nonlinear Mechanical Parameters Determined via Fourier Transform of the Stress","volume":"135","author":"Hirschberg","year":"2018","journal-title":"J. Appl. Polym. Sci."},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"5572","DOI":"10.1021\/acs.macromol.0c00632","article-title":"Effect of Topology and Molecular Properties on the Rheology and Fatigue Behavior of Solid Polystyrene\/Polyisoprene Di- and Triblock Copolymers","volume":"53","author":"Hirschberg","year":"2020","journal-title":"Macromolecules"},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"103100","DOI":"10.1016\/j.mechmat.2019.103100","article-title":"Fatigue Analysis of Brittle Polymers via Fourier Transform of the Stress","volume":"137","author":"Hirschberg","year":"2019","journal-title":"Mech. Mater."},{"key":"ref_43","doi-asserted-by":"crossref","first-page":"107070","DOI":"10.1016\/j.polymertesting.2021.107070","article-title":"Combining Mechanical and Thermal Surface Fourier Transform Analysis to Follow the Dynamic Fatigue Behavior of Polymers","volume":"96","author":"Hirschberg","year":"2021","journal-title":"Polym. Test"},{"key":"ref_44","doi-asserted-by":"crossref","first-page":"2100165","DOI":"10.1002\/mame.202100165","article-title":"Universal Strain-Life Curve Exponents for Thermoplastics and Elastomers under Tension-Tension and Torsion","volume":"306","author":"Hirschberg","year":"2021","journal-title":"Macromol. Mater. Eng."}],"container-title":["Recycling"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2313-4321\/8\/1\/2\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T01:51:21Z","timestamp":1760147481000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2313-4321\/8\/1\/2"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2022,12,26]]},"references-count":44,"journal-issue":{"issue":"1","published-online":{"date-parts":[[2023,2]]}},"alternative-id":["recycling8010002"],"URL":"https:\/\/doi.org\/10.3390\/recycling8010002","relation":{},"ISSN":["2313-4321"],"issn-type":[{"value":"2313-4321","type":"electronic"}],"subject":[],"published":{"date-parts":[[2022,12,26]]}}}