The influence of the waste ethylene vinyl acetate copolymer on the thermal degradation of the waste polypropylene

Uçar, Suat; Özkan, Ahmet R.; Yanık, Jale; Karagöz, Selhan

doi:10.1016/j.fuproc.2008.05.010

Cited by 13 publications

(7 citation statements)

References 15 publications

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“…When compared to PP films, commercial BOPP films have dissimilar proprieties given the peculiar process of chain orientation. This singularity, however, makes the BOPP structure less subject to microbial attack and, consequently, biodegradation 38 , and does not reflect in maximum degrading temperature increase when compared to PPv. Results obtained concerning mass loss on BOPPv samples are similar to the PPv films, but dissimilar for the buried samples, showing that BOPP chain orientation interferes in its thermal degradation.…”

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confidence: 99%

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Degradation study of polypropylene (PP) and bioriented polypropylene (BOPP) in the environment

et al. 2011

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Polymers are vastly employed for numerous purposes in different industrial segments and generate soaring quantities of discarding in the environment. This research analyzed the degradability/biodegradability of polypropylene films (PP) and Bioriented polypropylene (BOPP) polymers after 11 months interred in the São Giácomo landfill in Caxias do Sul. Comparing the buried PP film to a sample of virgin PP, two peaks of degrading activity appeared at the TG curve as well as structure modification typified by occurrence of new absorption bands at FTIR, which can be credited to changes in crystallinity. Thermal analysis carried out on the buried PP and BOPP showed decreases in the percentage of crystallinity due to chain scission. The major reduction was observed in the PP, since its crystallinity is a consequence of polymerization instead of chain orientation processes, as in BOPP. Cracks and erosion of the polymer surface were detected in both PP and BOPP, indicating degrading processes by microorganisms.

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confidence: 99%

“…Chawla et al (2006) credits changes in crystallinity in the polymers to reductions in molar mass, probably due to chain β-scission [32][33][34][35][36][37][38][39] . The decrease in the degree of crystallization due to biodegradation suggests that smaller crystals were formed 40,41 .…”

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confidence: 99%

Degradation study of polypropylene (PP) and bioriented polypropylene (BOPP) in the environment

et al. 2011

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“…A final consideration about energy balances from simulations that highlighted another interesting feature of the advanced Photolife process: the thermal treatment of the EVA offers a significant energy credit. In particular, considering the simulation at 30,000 t/y, the exothermic thermal degradation of EVA (calorific value −45 kJ/g [38]) would produce about 12.5 MWh/batch that could be conveniently recovered where needed across the flowsheet. Then, according to a possible energy recovery scheme, part of this energy can be recovered to heat up the leaching reactor and the cyclohexane evaporator, requiring 0.025 and 1.4 MWh/batch, respectively.…”

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confidence: 99%

Development and Techno-Economic Analysis of an Advanced Recycling Process for Photovoltaic Panels Enabling Polymer Separation and Recovery of Ag and Si

et al. 2020

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Photovoltaic panels were included in EU Directive as WEEE (Wastes of Electric and Electronic Equipment) requiring the implementation of dedicated collection schemes and end-of-life treatment ensuring targets in terms of recycling rate (80%) and recovery rate (85%). Photovoltaic panels are mainly made up of high-quality solar glass (70–90%), but also metals are present in the frames (Al), the cell (Si), and metallic contacts (Cu and Ag). According to the panel composition, about $72 per 100 kg of panels can be recovered by entirely recycling the panel metal content. The PhotoLife process for the treatment of end-of-life photovoltaic panels was demonstrated at pilot scale to recycle high value glass, Al and Cu scraps. A process upgrade is here reported allowing for polymer separation and Ag and Si recycling. By this advanced PhotoLife process, 82% recycling rate, 94% recovery rate, and 75% recoverable value were attained. Simulations demonstrated the economic feasibility of the process at processing capacity of 30,000 metric ton/y of end-of-life photovoltaic panels.

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“…Ethylene vinyl acetate (EVA) is one of the important synthetic polymers. EVA is a copolymer material; it is a waste material that cannot be reprocessed due to its chemical properties, occupies a significant volume due to its low density, and is difficult to dispose of in landfills, but has fire retardant properties, provides flexibility and sound insulation, and can be used as a substitute material in composite structures due to its low cost [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Experimental and theoretical behavior of cementitious plates containing ethylene vinyl acetate reinforced with glass woven fabric under impact load

Doğan

Karaca

2021

Materials Science-Poland

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The paper is an analysis of the experimental and theoretical behavior of cementitious plate containing waste ethylene vinyl acetate (EVA) with and without reinforcement with glass fiber woven fabric (GFRP) under low-velocity impact load effect. Cementitious plates of 150 mm × 150 mm size and three different thicknesses (15 mm, 30 mm, 50 mm) are produced by replacing the cement mixture aggregate with EVA at 0%, 18%, 32%, 45%, and 56% by volume of aggregate. Then, the cementitious plates are coated with GFRP using vacuum infusion method. The effect of EVA and GRFP coatings on the dynamic impact behavior of cementitious plates is investigated by applying a low-velocity impact test on the produced cementitious plates with an impactor of 18 mm diameter, 10.50 kg weight, and 500 mm height. The data obtained from the experimental results are analyzed based on the mass-plate theory, lightweight (LWC) and normal weight (NWC) concrete, and the consistency of the theoretical results with the experimental results is compared. It has been determined that the use of NWC is more suitable for cementitious plates with an EVA replacement rate in the range of 0–32%, while the use of LWC offers more optimum results if the EVA ratio is in the range of 32–56%. Especially when the EVA displacement exceeds 32%, it causes excessive void formation in the structure, resulting in a reduction in the dynamic impact loads of cementitious plates. GFRP coating with vacuum infusion method is not recommended for cementitious plate structures when the EVA replacement rate exceeds 32% by volume of aggregate.

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The influence of the waste ethylene vinyl acetate copolymer on the thermal degradation of the waste polypropylene

Cited by 13 publications

References 15 publications

Degradation study of polypropylene (PP) and bioriented polypropylene (BOPP) in the environment

Degradation study of polypropylene (PP) and bioriented polypropylene (BOPP) in the environment

Development and Techno-Economic Analysis of an Advanced Recycling Process for Photovoltaic Panels Enabling Polymer Separation and Recovery of Ag and Si

Experimental and theoretical behavior of cementitious plates containing ethylene vinyl acetate reinforced with glass woven fabric under impact load

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