Study on the thermal stability of stabilized and unstabilized low-density polyethylene films

Babaghayou, Meriam Imane; Mourad, Abdel‐Hamid I.; Ochoa, A.; Beltrán, Freddys R.; Cherupurakal, Nizamudeen

doi:10.1007/s00289-020-03363-5

Cited by 23 publications

(22 citation statements)

References 29 publications

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“…At this immersion temperature, the sustained release of CO 2 is responsible for the increase in mass loss. This results in a reduction in the tensile strength of the composite [ 69 , 70 , 71 , 72 ].…”

Section: Resultsmentioning

confidence: 99%

Impact of Prolonged Exposure of Eleven Years to Hot Seawater on the Degradation of a Thermoset Composite

2021

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This paper presents a long-term experimental investigation of E-glass/epoxy composites’ durability exposed to seawater at different temperatures. The thermoset composite samples were exposed to 23 °C, 45 °C and 65 °C seawater for a prolonged exposure time of 11 years. The mechanical performance as a function of exposure time was evaluated and a strength-based technique was used to assess the durability of the composites. The experimental results revealed that the tensile strength of E-glass/epoxy composite was reduced by 8.2%, 29.7%, and 54.4% after immersion in seawater for 11 years at 23 °C, 45 °C, and 65 °C, respectively. The prolonged immersion in seawater resulted in the plasticization and swelling in the composite. This accelerated the rate of debonding between the fibers and matrix. The failure analysis was conducted to investigate the failure mode of the samples. SEM micrographs illustrated a correlation between the fiber/matrix debonding, potholing, fiber pull-out, river line marks and matrix cracking with deterioration in the tensile characteristics of the thermoset composite.

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Section: Resultsmentioning

confidence: 99%

Impact of Prolonged Exposure of Eleven Years to Hot Seawater on the Degradation of a Thermoset Composite

2021

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“…The sample was heated in a controlled atmosphere with a heating rate of 10 °C/min until reaching 600 °C, under a flow of N 2 gas at a rate of 60 mL/min. The weight history was plotted to assess the thermal stability of HDPE at each temperature [ 39 , 40 ].…”

Section: Methodsmentioning

confidence: 99%

Effect of Processing Techniques on the Microstructure and Mechanical Performance of High-Density Polyethylene

et al. 2021

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The versatility of high-density polyethylene (HDPE) makes it one of the most used polymers for vast applications ranging from food packaging to human implants. However, there still is confusion regarding the proper selection of processing techniques to produce HDPE specimens for high-end applications. Herein, we compare the processing of HDPE by two relevant techniques: compression and injection molding. The fabricated samples were studied using uniaxial tensile testing to determine their mechanical performance. Furthermore, the microstructure of samples was analyzed using different characterization techniques. Compression-molded specimens recorded a higher degree of crystallinity (DC) using two different characterization techniques such as differential scanning calorimetry (DSC) and X-ray diffraction (XRD). With this information, critical processing factors were determined, and a general structure–property relationship was established. It was demonstrated that having a higher DC resulted in higher yield strength and Young’s modulus. Furthermore, premature failure was observed in the injection-molded specimens, resulting in lower mechanical performance. This premature failure was caused due to flow marks observed using scanning electron microscopy (SEM). Therefore, it is concluded that compression molding produces superior samples compared to injection molding.

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“…This may have been due to the duration of plastic film application on the farmlands or mulch plastic having a greater chance of remaining in the soil than greenhouse plastic because the former directly contact agricultural soil. Nevertheless, the current quantitative data show the stages of macroplastic fragmentation into smaller pieces (microplastics) in the greenhouse farmlands due to aging caused by single or multiple effects such as agrochemicals, environmental pressure, thickness, content of the plastic films and climatic conditions (BABAGHAYOU et al, 2020). Figure 2 also shows the polymer types detected in terms of their weight.…”

Section: Abundance and Characteristics Of Macroplastics On The Greenh...mentioning

confidence: 89%

“…In Hungary, greenhouse farming produces horticultural products and minimizes the need to import vegetables (NÉMETH & EHRET-BERCZI, 2014). Low-density polyethylene (LDPE) is the most common plastic used in greenhouse farming (BABAGHAYOU et al, 2020;ALHAMDAN et al, 2009;DILARA and BRIASSOULIS, 2000). Other plastics used in protective agriculture include polyvinyl chloride (PVC), ethylene-vinyl acetate, and linear LDPE.…”

Section: Introductionmentioning

confidence: 99%

Greenhouse farming as a source of macroplastic and microplastics contamination in agricultural soils: a case study from Southeast-Hungary

Sa’adu

Farsang

2022

Agrokem

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Greenhouse plastic contaminations in agricultural soils were studied to quantify and examine the macroplastic and microplastic contaminants on the soil surface, soil profile, and groundwater under greenhouse farmland. Random sampling was used to select three areas in a greenhouse farm where macroplastic and microplastic data were collected. Four composite samples were collected from shallow (0–20 cm) and deep (20–40 cm) soils for each sampling point, respectively. Three soil profiles were dug, and samples were collected at intervals of 20 cm. Groundwater samples were also collected from the same profiles at a depth of 100 cm. Microplastics were extracted using predigestion of organic matter with 30% H2O2 and density separation with ZnCl2. The total mass of macroplastics in the greenhouse farmland was 6.4 kg ha–1. Polyethylene and polyvinyl chloride were the dominant plastic structures, and the dominant sizes were 1–5 and 0.5–1.0 cm, respectively. Overall, the average abundance of microplastics in the greenhouse soil was 225 ± 61.69 pieces/kg, and the dominant size structure was 2–3 mm. The average microplastic concentrations at depths of 0–20 and 20–40 cm were 300 ± 93 and 150.0 ± 76.3 pieces/kg, respectively. The average microplastic concentration in the groundwater was 2.3 pieces/l, and fibers were the dominant plastic structure. Given that microplastics were found in greenhouse soil, soil profiles, and groundwater, we recommend the careful cleaning and disposal of plastics on greenhouse farmland and further research to shed light on the level of microplastic contamination in the soil profiles and groundwater.

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Study on the thermal stability of stabilized and unstabilized low-density polyethylene films

Cited by 23 publications

References 29 publications

Impact of Prolonged Exposure of Eleven Years to Hot Seawater on the Degradation of a Thermoset Composite

Impact of Prolonged Exposure of Eleven Years to Hot Seawater on the Degradation of a Thermoset Composite

Effect of Processing Techniques on the Microstructure and Mechanical Performance of High-Density Polyethylene

Greenhouse farming as a source of macroplastic and microplastics contamination in agricultural soils: a case study from Southeast-Hungary

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