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Your search keyword '"recycled opaque PET"' showing total 4 results
Start Over Descriptor "recycled opaque PET" Topic reactive extrusion
4 results on '"recycled opaque PET"'

1. Structure and Properties of Reactively Extruded Opaque Post-Consumer Recycled PET

Author

María Virginia Candal, Maryam Safari, Mercedes Fernández, Itziar Otaegi, Agurtzane Múgica, Manuela Zubitur, Gonzalo Gerrica-echevarria, Víctor Sebastián, Silvia Irusta, David Loaeza, Maria Lluisa Maspoch, Orlando O. Santana, and Alejandro J. Müller

Subjects
recycled opaque PET, reactive extrusion, chain extension, long-chain branching, Organic chemistry, QD241-441
Abstract

The recyclability of opaque PET, which contains TiO2 nanoparticles, has not been as well-studied as that of transparent PET. The objective of this work is to recycle post-consumer opaque PET through reactive extrusion with Joncryl. The effect of the reactive extrusion process on the molecular structure and on the thermal/mechanical/rheological properties of recycling post-consumer opaque PET (r-PET) has been analyzed. A 1% w/w Joncryl addition caused a moderate increase in the molecular weight. A moderate increase in chain length could not explain a decrease in the overall crystallization rate. This result is probably due to the presence of branches interrupting the crystallizable sequences in reactive extruded r-PET (REX-r-PET). A rheological investigation performed by SAOS/LAOS/elongational studies detected important structural modifications in REX-r-PET with respect to linear r-PET or a reference virgin PET. REX-r-PET is characterized by a slow relaxation process with enlarged elastic behaviors that are characteristic of a long-chain branched material. The mechanical properties of REX-r-PET increased because of the addition of the chain extender without a significant loss of elongation at the break. The reactive extrusion process is a suitable way to recycle opaque PET into a material with enhanced rheological properties (thanks to the production of a chain extension and long-chain branches) with mechanical properties that are comparable to those of a typical virgin PET sample.

Published
2021
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2. Recycling and Resource Recovery from Polymers.

Author

Devasahayam, Sheila, Devasahayam, Sheila, Singh, Raman, and Strezov, Vladimir

Subjects
Environmental economics, Pollution control, Research & information: general, Hamburg wheel-tracking, activation energy, alternative fuels, animal manure, automotive shredder residue, ball milling, bituminous modifier, carbon conversions, carbon nanotubes, cement decarbonization, chain extension, chemical analysis, circo-economics, circular economy, clean energy, co-pyro-gasification, co-pyrolysis, combustion, compatibilisation, composition, contamination, creep compliance, cryoagent, dispersion, dynamic modulus, epoxy resin, flame retardancy, functionalization, impact properties, indirect tensile strength, kinetics, lignin, lignin modified bitumen, linear correlation, linear viscoelastic properties, liquid nitrogen, long-chain branching, material circularity indicator, mechanical properties, mechanical recycling, mechano-chemical treatment, n/a, non-isothermal crystallisation kinetics, non-soot catalysts, open graded friction course, packaging, plastic waste, poly (3-hydroxybutyrate-co-3-hydroxyvalerate), poly (l-lactic acid), polyethylene, polyethylene-modified bitumen, polymer, polymer based post-consumer waste, polymer-modified asphalt, polypropylene, polysilicone, post-consumer waste, reactive extrusion, recycled opaque PET, recycling, relaxation modulus, rheological behavior, road engineering, rubber, rutting, silicone, solid recovered fuel, sustainable energy, synergy, tensile properties, thermal conductivity, thermal degradation, thiol-ene, viscoelastic properties, waste tire, waste utilization, waste-to-energy, wax-based additives
Abstract

Summary: Environmental challenges posed by wrong end of lifeplastic management drive the plastics recycling schemes for energy recovery and cutting emissions, penalties, energy consumption, non-renewable resources, and manufacturing costs. Plastic recycling has the lowest environmental impact on global warming potential and total energy use. However, under-utilised plastic wastes due to low value issues with sorting/contamination pose major challenges. Novel technologies drive innovation in a circular economy model for plastics and employ reuse, recycling and responsible manufacture solutions, support the development of new industries and jobs, reduce emissions and increase efficient use of natural resources (including energy, water and materials). Many economies are working towards achieving a zero plastic waste economy. This Special Issue covers the applications of recycled plastics in the areas of energy recovery/alternative fuels, economic analyses, bitumen additives, flame retardants, recycled polymer nanocomposites to enhance the mechanical property, thermomechanical recycling to improve physical properties, mechano-chemical treatment, cryogenic waste tyre recycling, application in decarbonizing technology, e.g., cement industry, waste characterization, improving agricultural soil quality, as smart fertilizers. The Editors express their appreciation to all the contributors across the world in the development of this reprint. This reprint gives different perspectives and technical ideas for the transformation of plastic wastes into value-added products and to achieve higher recycling rates in the coming years.

3. Structure and properties of reactively extruded opaque post-consumer recycled PET

Author

Maria Lluisa Maspoch, Silvia Irusta, Alejandro J. Müller, Manuela Zubitur, Itziar Otaegi, Agurtzane Mugica, Maryam Safari, Orlando O. Santana, Mercedes Fernández, Victor Sebastian, María Virginia Candal, David Loaeza, Gonzalo Gerrica-Echevarria, European Commission, Eusko Jaurlaritza, Interreg POCTEFA, Universitat Politècnica de Catalunya. Departament de Ciència i Enginyeria de Materials, and Universitat Politècnica de Catalunya. e-PLASCOM - Plàstics i Compòsits Ecològics

Subjects
Materials science, Polymers and Plastics, Opacity, Polymers, Organic chemistry, Reactive extrusion, Enginyeria dels materials [Àrees temàtiques de la UPC], Article, law.invention, reactive extrusion, QD241-441, Rheology, Long-chain branching, law, Composite material, chain extension, Extender, Tio2 nanoparticles, Relaxation process, General Chemistry, recycled opaque PET, Polímers, Chain length, Recycled opaque PET, Elongation, long-chain branching, Chain extension
Abstract

This article belongs to the Special Issue Recycling and Resource Recovery from Polymers., The recyclability of opaque PET, which contains TiO2 nanoparticles, has not been as well-studied as that of transparent PET. The objective of this work is to recycle post-consumer opaque PET through reactive extrusion with Joncryl. The effect of the reactive extrusion process on the molecular structure and on the thermal/mechanical/rheological properties of recycling post-consumer opaque PET (r-PET) has been analyzed. A 1% w/w Joncryl addition caused a moderate increase in the molecular weight. A moderate increase in chain length could not explain a decrease in the overall crystallization rate. This result is probably due to the presence of branches interrupting the crystallizable sequences in reactive extruded r-PET (REX-r-PET). A rheological investigation performed by SAOS/LAOS/elongational studies detected important structural modifications in REX-r-PET with respect to linear r-PET or a reference virgin PET. REX-r-PET is characterized by a slow relaxation process with enlarged elastic behaviors that are characteristic of a long-chain branched material. The mechanical properties of REX-r-PET increased because of the addition of the chain extender without a significant loss of elongation at the break. The reactive extrusion process is a suitable way to recycle opaque PET into a material with enhanced rheological properties (thanks to the production of a chain extension and long-chain branches) with mechanical properties that are comparable to those of a typical virgin PET sample., We would like to acknowledge funding by the EU Interreg H2020 program through project POCTEFA EFA329/19. This work also received funding from the Basque Government, grant IT1309-19.

Published
2021

4. Structure and Properties of Reactively Extruded Opaque Post-Consumer Recycled PET.

Author

Candal, María Virginia, Safari, Maryam, Fernández, Mercedes, Otaegi, Itziar, Múgica, Agurtzane, Zubitur, Manuela, Gerrica-echevarria, Gonzalo, Sebastián, Víctor, Irusta, Silvia, Loaeza, David, Maspoch, Maria Lluisa, Santana, Orlando O., and Müller, Alejandro J.

Subjects
*REACTIVE extrusion, *EXTRUSION process, *MOLECULAR structure, *MOLECULAR weights
Abstract

The recyclability of opaque PET, which contains TiO2 nanoparticles, has not been as well-studied as that of transparent PET. The objective of this work is to recycle post-consumer opaque PET through reactive extrusion with Joncryl. The effect of the reactive extrusion process on the molecular structure and on the thermal/mechanical/rheological properties of recycling post-consumer opaque PET (r-PET) has been analyzed. A 1% w/w Joncryl addition caused a moderate increase in the molecular weight. A moderate increase in chain length could not explain a decrease in the overall crystallization rate. This result is probably due to the presence of branches interrupting the crystallizable sequences in reactive extruded r-PET (REX-r-PET). A rheological investigation performed by SAOS/LAOS/elongational studies detected important structural modifications in REX-r-PET with respect to linear r-PET or a reference virgin PET. REX-r-PET is characterized by a slow relaxation process with enlarged elastic behaviors that are characteristic of a long-chain branched material. The mechanical properties of REX-r-PET increased because of the addition of the chain extender without a significant loss of elongation at the break. The reactive extrusion process is a suitable way to recycle opaque PET into a material with enhanced rheological properties (thanks to the production of a chain extension and long-chain branches) with mechanical properties that are comparable to those of a typical virgin PET sample. [ABSTRACT FROM AUTHOR]

Published
2021
Full Text
View/download PDF

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