Next Article in Journal
Industrial Symbiosis through the Use of Biosolids as Fertilizer in Romanian Agriculture
Next Article in Special Issue
How COVID-19 Could Change the Economics of the Plastic Recycling Sector
Previous Article in Journal
Challenges and Emerging Trends in Toner Waste Recycling: A Review
Previous Article in Special Issue
Incentives for Plastic Recycling: How to Engage Citizens in Active Collection. Empirical Evidence from Spain
Article

Effect of Hard Plastic Waste on the Quality of Recycled Polypropylene Blends

1
National Research Council of Italy, Institute of Atmospheric Pollution Research (CNR-IIA), Via Salaria 29,300, 00015 Monterotondo, Italy
2
National Research Council of Italy, Institute for the Study of Nanostructured Materials (CNR-ISMN), Via Salaria 29,300, 00015 Monterotondo, Italy
3
Department of Civil and Environmental Engineering, Perugia University, Unità di Ricerca Consorzio Interuniversitario per la Scienza e la Tecnologia dei Materiali (INSTM), Strada di Pentima 4, 05100 Terni, Italy
4
Ente di Studio per la Pianificazione Ecosostenibile dei Rifiuti s.r.l. (ESPER), Largo Cibrario 10, 10144 Torino, Italy
*
Author to whom correspondence should be addressed.
Academic Editors: Michele John and Wan-Ting (Grace) Chen
Received: 12 July 2021 / Revised: 27 August 2021 / Accepted: 29 August 2021 / Published: 1 September 2021
(This article belongs to the Special Issue Advances in the Recycling and Processing of Plastic Waste)
The recycling of plastic waste is undergoing fast growth due to environmental, health and economic issues, and several blends of post-consumer and post-industrial polymeric materials have been characterized in recent years. However, most of these researches have focused on plastic containers and packaging, neglecting hard plastic waste. This study provides the first experimental characterization of different blends of hard plastic waste and virgin polypropylene in terms of melt index, differential scan calorimetry (DSC), thermogravimetric analysis (TGA), mechanical properties (tensile, impact and Shore hardness) and Vicat softening test. Compared to blends based on packaging plastic waste, significant differences were observed in terms of melt flow index (about 10 points higher for hard plastic waste). Mechanical properties, in particular yield strain, were instead quite similar (between 5 and 9%), despite a higher standard deviation being observed, up to 10%, probably due to incomplete homogenization. Results demonstrate that these worse performances could be mainly attributed to the presence of different additives, as well as to the presence of impurities or traces of other polymers, other than incomplete homogenization. On the other hand, acceptable results were obtained for selected blends; the optimal blending ratio was identified as 78% post-consumer waste and 22% post-industrial waste, meeting the requirement for injection molding and thermoforming. View Full-Text
Keywords: plastic waste management; recycling; polypropylene (PP); melt flow index; circular economy plastic waste management; recycling; polypropylene (PP); melt flow index; circular economy
Show Figures

Figure 1

MDPI and ACS Style

Tratzi, P.; Giuliani, C.; Torre, M.; Tomassetti, L.; Petrucci, R.; Iannoni, A.; Torre, L.; Genova, S.; Paolini, V.; Petracchini, F.; Di Carlo, G. Effect of Hard Plastic Waste on the Quality of Recycled Polypropylene Blends. Recycling 2021, 6, 58. https://0-doi-org.brum.beds.ac.uk/10.3390/recycling6030058

AMA Style

Tratzi P, Giuliani C, Torre M, Tomassetti L, Petrucci R, Iannoni A, Torre L, Genova S, Paolini V, Petracchini F, Di Carlo G. Effect of Hard Plastic Waste on the Quality of Recycled Polypropylene Blends. Recycling. 2021; 6(3):58. https://0-doi-org.brum.beds.ac.uk/10.3390/recycling6030058

Chicago/Turabian Style

Tratzi, Patrizio, Chiara Giuliani, Marco Torre, Laura Tomassetti, Roberto Petrucci, Antonio Iannoni, Luigi Torre, Salvatore Genova, Valerio Paolini, Francesco Petracchini, and Gabriella Di Carlo. 2021. "Effect of Hard Plastic Waste on the Quality of Recycled Polypropylene Blends" Recycling 6, no. 3: 58. https://0-doi-org.brum.beds.ac.uk/10.3390/recycling6030058

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop