Thermo-mechanical degradation of polypropylene (PP) and low-density polyethylene (LDPE) blends exposed to simulated recycling

Saikrishnan, Sainiwetha; Jubinville, Dylan; Tzoganakis, Costas; Mekonnen, Tizazu H.

doi:10.1016/j.polymdegradstab.2020.109390

Cited by 93 publications

(55 citation statements)

References 30 publications

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“…These materials may include low-density and high-density PE. [1][2][3][4] Because of their readily accessible raw materials, more than 80 million tons of PEs are produced at an affordable cost every year. Industrial catalysts that are durable and recent polymerization methods are more efficient than ever before.…”

Section: Introductionmentioning

confidence: 99%

Rapid kinetic evaluation of homogeneous single-site metallocene catalysts and cyclic diene: how do the catalytic activity, molecular weight, and diene incorporation rate of olefins affect each other?

et al. 2021

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Section: Introductionmentioning

confidence: 99%

Rapid kinetic evaluation of homogeneous single-site metallocene catalysts and cyclic diene: how do the catalytic activity, molecular weight, and diene incorporation rate of olefins affect each other?

et al. 2021

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“…The maximum degradation rate of the two materials in this experiment changed obviously in the direction of higher temperature. For polymer blended materials and block copolymerized materials, 49–51 the TGA curve will shift different degrees according to the content of the internal components of the material. According to the previous report, 44 the content of the soft and hard segments in the poly(ether‐ block ‐amide) material has a great influence on the thermal decomposition process, and the decomposition occurs first in the polyether soft segment.…”

Section: Resultsmentioning

confidence: 99%

Recycling extrusion of poly(ether‐block‐amide) thermoplastic elastomer (Pebax®): the influence of chemical and crystal change on mechanical properties

Gui

Li²,

Wu³

et al. 2021

Polymer International

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In this work, two poly(ether‐block‐amide) thermoplastic elastomers (Pebax® 2533 and Pebax® 5533) were subjected to five extrusion cycles. We characterized the various performance changes of the two materials after injection molding, including chemical structure, crystalline properties and mechanical properties, and also analyzed the reasons for the observed changes. Attenuated total reflectance Fourier transform infrared spectroscopy shows that, after repeated extrusion, free hydroxyl groups and new oxygen‐containing functional groups (carbonyl groups) were formed inside the materials. X‐ray photoelectron spectroscopy shows that the oxygen content of the material increased significantly. TGA shows that the thermal stability of the material was slightly improved. The elastomer melt index also increased with extrusion cycles. By analyzing the crystalline properties (DSC, XRD) of the materials, we tentatively explain the different changes in the two poly(ether‐block‐amide) thermoplastic elastomers in terms of mechanical properties. © 2021 Society of Industrial Chemistry.

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“…A major challenge of mechanical recycling is the occurrence of thermo-mechanical and thermo-oxidative degradation caused by high temperatures and shear in the presence of oxygen and impurities during reprocessing [147,148]. Degradation mechanisms cause irreversible changes within the polymer structure, causing the deterioration of the thermal, mechanical, and physical performance of the recycled materials [149,150]. During mechanical recycling, two competing degradation mechanisms occur: random chain scission and chain crosslinking (Figure 5) [151,152].…”

Section: Mechanical Recycling Of Posmentioning

confidence: 99%

Polyolefins and Polyethylene Terephthalate Package Wastes: Recycling and Use in Composites

et al. 2021

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Plastics are versatile materials used in a variety of sectors that have seen a rapid increase in their global production. Millions of tonnes of plastic wastes are generated each year, which puts pressure on plastic waste management methods to prevent their accumulation within the environment. Recycling is an attractive disposal method and aids the initiative of a circular plastic economy, but recycling still has challenges to overcome. This review starts with an overview of the current European recycling strategies for solid plastic waste and the challenges faced. Emphasis lies on the recycling of polyolefins (POs) and polyethylene terephthalate (PET) which are found in plastic packaging, as packaging contributes a signification proportion to solid plastic wastes. Both sections, the recycling of POs and PET, discuss the sources of wastes, chemical and mechanical recycling, effects of recycling on the material properties, strategies to improve the performance of recycled POs and PET, and finally the applications of recycled POs and PET. The review concludes with a discussion of the future potential and opportunities of recycled POs and PET.

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Thermo-mechanical degradation of polypropylene (PP) and low-density polyethylene (LDPE) blends exposed to simulated recycling

Cited by 93 publications

References 30 publications

Rapid kinetic evaluation of homogeneous single-site metallocene catalysts and cyclic diene: how do the catalytic activity, molecular weight, and diene incorporation rate of olefins affect each other?

Rapid kinetic evaluation of homogeneous single-site metallocene catalysts and cyclic diene: how do the catalytic activity, molecular weight, and diene incorporation rate of olefins affect each other?

Recycling extrusion of poly(ether‐block‐amide) thermoplastic elastomer (Pebax®): the influence of chemical and crystal change on mechanical properties

Polyolefins and Polyethylene Terephthalate Package Wastes: Recycling and Use in Composites

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