Thermal degradation kinetics study of polyvinyl chloride (PVC) sheath for new and aged cables

Wang, Zhi; Xie, Tian; Ning, Xiaoyao; Liu, Yuchuan; Wang, Jian

doi:10.1016/j.wasman.2019.08.042

Cited by 50 publications

(24 citation statements)

References 42 publications

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“…The expression of OFW method can be derived by integrating Equation (7) and combining Doyle's approximation (ln p E a RT ≈ −5.331 − 1.052 E a RT ) [32]:…”

Section: Model-free Methodsmentioning

confidence: 99%

“…The differences in kinetic models may be caused by the reason that IB and NOC contain some other non-polypropylene and non-polyvinyl chloride materials. The kinetic models of PVC studied by Wang et al are also different, which may be caused by the same reason [7].…”

Section: Model-fitting Analysismentioning

confidence: 99%

“…The thermal degradation behavior and thermal risk of traditional polymers has attracted lots of attention of many researchers, among which the research on polypropylene and polyvinyl chloride is common. Wang et al investigated the activation energy of polyvinyl chloride by several commonly-used iso-conversional methods including Processes 2021, 9, 27 2 of 26 Kissinger-Akahira-Sunose (KAS) method, Ozawa-Flynn-Wall (OFW) method, and Friedman method [7]. Aboulkas et al studied the pyrolysis behavior of polypropylene [8].…”

Section: Introductionmentioning

confidence: 99%

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Insights into Thermal Degradation Behaviors and Reaction Kinetics of Medical Waste Infusion Bag and Nasal Oxygen Cannula

Zhang

Jiang

et al. 2020

Processes

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The thermal degradation behaviors and reaction kinetics of medical waste infusion bag (IB) and nasal oxygen cannula (NOC) were investigated under inert atmosphere with the heating rates of 5, 10, 15, and 25 K·min−1. Ozawa–Flynn–Wall (OFW), Kissinger–Akahira–Sunose (KAS), and Friedman were employed to estimate the activation energy. Coats–Redfern and Kennedy–Clark methods were adopted to predict the possible reaction mechanism. The results suggested that the reaction mechanism of IB pyrolysis was zero-order, and that of NOC pyrolysis was concluded that zero-order for the first stage and three-dimensional diffusion Jander equation for the second stage. Based on the kinetic compensation effect, the reconstructed reaction models for IB and NOC pyrolysis were elaborated by introducing adjustment functions. The results indicated that the reconstructed model fitted well with the experimental data. The results are helpful as a reference and provide guidance for the determination of IB and NOC degradation behaviors and the simulation of parameters.

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“…The expression of OFW method can be derived by integrating Equation (7) and combining Doyle's approximation (ln p E a RT ≈ −5.331 − 1.052 E a RT ) [32]:…”

Section: Model-free Methodsmentioning

confidence: 99%

Section: Model-fitting Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Insights into Thermal Degradation Behaviors and Reaction Kinetics of Medical Waste Infusion Bag and Nasal Oxygen Cannula

Zhang

Jiang

et al. 2020

Processes

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“…Finally, the model equation belonging to the theoretical master-plot which largely overlaps with the experimental master-plot is concluded to represent the concerned reaction best [10], [11].…”

Section: 𝑙𝑛 ( 𝛽 𝑇 2 ) = 𝑙𝑛 ( 𝐴 𝑅 𝑔(𝛼) 𝐸 𝑎mentioning

confidence: 98%

Gördes Lateritinin CO Atmosferinde İzotermal Olmayan İndirgenme Kinetiği

Dilmaç

2021

International Journal of Advances in Engineering and Pure Sciences

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The growing demand for nickel metal and the depletion of high-grade sulfide ore reserves have turned the direction of industry towards laterites which are not desirable as the primary source due to their low Ni content and more energy-intensive processing. Thus, alternative routes are essential for effectively processing these ores while reducing the costs and greenhouse gas emissions. Solid-state reduction followed by magnetic separation is an attractive option for recovering the nickel in laterites. Hereby, this study analyzed the non-isothermal reduction kinetics of nickel laterite from Gördes (Manisa, Turkey) by CO at different heating rates of 20, 25, 30, 35, and 45 ºC/min. The activation energies were determined by Friedman (FR), Kissinger-Akahira-Sunose (KAS), and Flynn-Wall-Ozawa (FWO) methods, and the controlling mechanisms were determined by the Malek interpretation of the Sestak-Berggren Equation. The reduction process was divided into three stages which take place between "0 to 0.16", "0.16 to 0.45", and "0.45 to 0.7" reduction degrees respectively according to the kinetic analysis results. The first stage was determined to be interface reaction controlled (with "Ea" of 53 kJ/mol), while the second and third were determined to be mixed controlled (with "Ea" of 126 kJ/mol and 379 kJ/mol, respectively).

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“…As a consequence, the quantity of PVC out‐of‐use items that enter into the total waste stream has been progressively increasing and different methods of recycling/recovery of the polymer have been studied, as individual or blended plastics. Drawbacks are observed for PVC degradation by dehydrochlorination, crosslinking, formation of fraction with lower molecular masses or with oxygenated functional groups, but also for methods like landfilling, composting or incineration due to the high amount of toxic emission (mainly hydrochloric acid); mechanical and chemical recycling, especially for individual polymers, can be considered the most suitable methods to reuse PVC waste 1,2,4–11 . Mechanical recycling consists in grinding and then melting and remolding the plastic into different products.…”

Section: Introductionmentioning

confidence: 99%

Influence of non‐metallic fraction of printed circuit boards waste on recycled polyvinyl chloride from waste wires

Grigorescu

Ghioca

Iancu

et al. 2021

J of Applied Polymer Sci

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Recycling of electric and electronic equipment is an emerging global issue in order to decrease the high amount of waste deposited on landfill or incinerated, and thus reducing the environmental pollution. Different strategies of eliminating this waste can be applied. In this paper, the non‐metallic fraction of printed circuit boards, due to the contained amount of glass fiber and rigid epoxy matrix, are considered suitable for valorization as reinforcing filler for polyvinyl chloride recovered from the insulation of equipment cables. The composites containing up to 30% filler are characterized in terms of structural, morphological, thermal, dielectric, mechanical and dynamic‐mechanical properties. Physical interactions are established between the components. Good homogeneity of composites at small dosages of filler is proven, and thus the mechanical and dynamic‐mechanical properties present increased or unchanged values compared with the polymeric matrix. At higher amounts of waste powder, some defects and agglomerates are observed and correlated with decreased values of the main tensile characteristics. Based on the physical‐mechanical and dielectric characterization, the paper shows that reinforced recycled polyvinyl chloride composites with 15%–20% non‐metallic fraction of printed circuit boards waste present suitable properties for reuse the polymer in different technical applications, mainly as insulating technical materials.

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Thermal degradation kinetics study of polyvinyl chloride (PVC) sheath for new and aged cables

Cited by 50 publications

References 42 publications

Insights into Thermal Degradation Behaviors and Reaction Kinetics of Medical Waste Infusion Bag and Nasal Oxygen Cannula

Insights into Thermal Degradation Behaviors and Reaction Kinetics of Medical Waste Infusion Bag and Nasal Oxygen Cannula

Gördes Lateritinin CO Atmosferinde İzotermal Olmayan İndirgenme Kinetiği

Influence of non‐metallic fraction of printed circuit boards waste on recycled polyvinyl chloride from waste wires

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