Recycling of waste from polymer materials: An overview of the recent works

Hamad, Kotiba; Kaseem, Mosab; Deri, Fawaz

doi:10.1016/j.polymdegradstab.2013.09.025

Cited by 396 publications

(280 citation statements)

References 73 publications

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“…In the past decades, plastic consumption resulted to a sudden growth due to adoption of higher conditions of living and need of increasing human population throughout the world. Nowadays, modern community appears to be blended together with plastic materials and the society consuming polymers will have a hard time to live its absence since polymeric materials are regarded to have diverse utilizations in several fields such as medicine, household appliances, construction, packaging, automotive, electronics and aerospace parts [5].…”

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confidence: 99%

“…There are several techniques for polymer reduction including reuse, mechanical recycling, and chemical recycling [5]:…”

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confidence: 99%

“…Although some milk and drinks containers are being utilized again with the same purpose, there is also marketplace reutilization in which several companies manufacture refill sachets for bottle re-consumption [5].…”

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confidence: 99%

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Determination of Catalytic Rate Constants towards Polymeric Conversion to Synthetic Oils: Bridging the Gap between Kinetics and Thermodynamics

Llarena¹

2017

MSCE

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Coal fly ash is being utilized as a recycling material for catalysis due to its aluminosilicate content. Catalytic conversion of polymeric wastes into synthetic gasoline and diesel through pyrolysis requires application of kinetic and thermodynamic principles. This study aimed to identify the catalytic rate constant necessary for rate law involved in reaction mechanisms and activation energy reduction needed for heat transfer rate. Stoichiometric application for balanced total series of elementary reactions is solved for the concentration determination of reactants and products. Unsteady-state in three dimensional directions of thermodynamics is derived for the determination of heat transfer rate, temperatures at any position in a sphere using Gurney and Lurie chart and center temperature in a sphere by Heisler chart. Application principles of rate law and Arrhenius equation can result to thermal conductivity as a function of activation energy leading to synthetic fuel production.

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“…There are several techniques for polymer reduction including reuse, mechanical recycling, and chemical recycling [5]:…”

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confidence: 99%

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Determination of Catalytic Rate Constants towards Polymeric Conversion to Synthetic Oils: Bridging the Gap between Kinetics and Thermodynamics

Llarena¹

2017

MSCE

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“…In a recent work that used lignin as an additive in polypropylene/coir composites, the authors also concluded that the additive incorporation did not decrease the mechanical strength 11 . The influence of thermal stabilizers as additives in composites was recently studied by Hamad et al 16 . In this study, polypropylene composites reinforced with differently treated natural fibers (10 and 20 wt%/PP) were obtained through melt mixing using a high-intensity thermokinetic mixer and were subsequently injected.…”

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confidence: 99%

“…Hamad et al 16 investigated the mechanical behaviors of recycled natural fiber composites that contained thermal stabilizer additives. Polypropylene composites reinforced with differently treated natural fibers (10 and 20 wt%/PP) were obtained through melt mixing using a high-intensity thermokinetic mixer and were subsequently injected, as in our study.…”

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The Recycling of Sugarcane Fiber/Polypropylene Composites

et al. 2015

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Mechanical recycling is utilized to reuse waste and obtain other plastic products via the reprocessing of a material in industrial equipment. Natural fiber composites have become more popular in recent years; however, these composites' mechanical behavior remains less well-understood than single polymers' behavior after recycling. Therefore, the objective of this work was to study the degradation of different sugarcane fibers/polypropylene composites using new grinding and injection processes and to evaluate the mechanical properties of these materials using analysis of variance (ANOVA). This work reveals the mechanical behaviors of recycled natural fiber composites that contain thermal stabilizer additives. Polypropylene composites reinforced with differently treated bagasse and straw fibers (10 and 20 wt%/PP) were obtained through melt mixing using a high-intensity thermokinetic mixer and were subsequently injected. The recycled composites exhibited decreased tensile strength relative to the original composites. However, when thermal stabilizers were added, the mechanical properties were maintained or increased, depending on the fiber and additive types.

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