Performance of PVC/SiO2 nanocomposites under thermal ageing

Habashy, Mohamed M.; Abd‐Elhady, Amr M.; Elsad, R. A.; Izzularab, Mohamed A.

doi:10.1007/s13204-018-00941-y

Cited by 37 publications

(15 citation statements)

References 22 publications

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“…Various additives including fillers are used by PVC processing, additionally to thermal stabilizers [2,[19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35]. The impact of micro-and nanosize mineral fillers on thermal properties of PVC, including that of montmorillonite (MMT), kaolinite, hydrotalcite, and halloysite (HNT), was extensively published [2,19,20,[22][23][24][25][26][27][28].…”

Section: Pvc Composites With Mineral Additivesmentioning

confidence: 99%

Thermal Stability of Nanosilica-Modified Poly(vinyl chloride)

2021

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The thermal stability of PVC with 1 wt % of spherical porous nanosilica, prepared by roll milling at processing time varied from 1 to 20 min, was investigated by means of visual color changes, Congo red, and thermogravimetric tests (TGA and DTG), as a function of rolling time and composition of PVC matrix. The melt flow rate (MFR) measurements were realized to identify the degradation-induced changes of processing properties. A high level of gelation of the PVC matrix for all samples was verified by DSC (differential scanning calorimetry). It was found that the addition of porous nanosilica to absorb a certain volume of HCl, produced by dehydrochlorination reaction, leads to an improvement of thermal stability, an effect observed in a form of minor color changes of the samples, lower evolution of gas hydrogen chloride, and slight changes of the MFR value. It was demonstrated that the TGA measurements are not sufficiently sensible to detect the degradation of PVC at the processing conditions, i.e., at the temperature equal to 220 °C and below this temperature.

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Section: Pvc Composites With Mineral Additivesmentioning

confidence: 99%

Thermal Stability of Nanosilica-Modified Poly(vinyl chloride)

2021

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“…Where Y parameter is the dielectric strength value (KV/mm) at all different conditions, X is the percentage of concentration of Silica filler in the samples. GWO was applied to find the best percentage of Silica filler by inserting the negative of the equations (1)(2)(3)(4) in the code of the program to obtain the best optimal value of dielectric strength in each condition.…”

Section: A Soft Program (Matlab) Resultsmentioning

confidence: 99%

“…The degradation causes irrevocable changes in the insulation properties, which rapidly reduce their lifetime. Therefore, the development of insulated cable is required to ensure long life under high temperatures [4]. Nano composites have better thermal stability with surface treated silica(Sio2) and also have lower weight loss rate with better flame retardant ability.…”

Section: Introductionmentioning

confidence: 99%

Grey Wolf Optimizer for Detecting Aging of Power Cables

Nasrat

Hassan

Abdelgawad³

2020

International Journal of Applied Energy Systems

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Polyvinyl chloride (PVC) is widely used in high and medium voltage cables insulation because of its low dielectric losses and its ability to improve cables properties in high temperatures. This paper aims to improve PVC electrical properties (dielectric strength) for high voltage and medium voltage cables in respect of mechanical characteristics by adding inorganic filler. Blends of PVC with inorganic filler : Silica (Sio2) were prepared with 10% ,20% , 30% and 40% by weight percentages concentration. The dielectric strength of the blends was tested in several thermal conditions such as (0 , 25 ,65 and 125C). Also dielectric strength of blends was tested after being immersed in water for 24 hours, 7 days and 10 day. Tensile strength was applied to investigate the mechanical properties of PVC after adding silica filler with 10% , 20% , 30% and 40% concentration percentages. Soft program (Curve fitting) is used to select the most proper equation between dielectric strength values under each condition and different percentages of Silica filler also between tensile strength and the same percentages of Silica filler. Grey Wolf Optimizer (GWO) was applied to find the best suitable percentages of Silica filler to obtain the best optimal values of dielectric strength and tensile strength .

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“…PVC is produced in a rigid or flexible form; the latter being preferred for electrical insulation. Despite high hardness and good mechanical properties, PVC starts to decompose at 140 °C, however, its thermal properties may be improved by the addition of heat stabilizers [ 19 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in Polymer Nanocomposites Based on Polyethylene and Polyvinylchloride for Power Cables

et al. 2020

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Polymer nanocomposites used in underground cables have been of great interest to researchers over the past 10 years. Their preparation and the dispersion of the nanoparticles through the polymer host matrix are the key factors leading to their enhanced dielectric properties. Their important dielectric properties are breakdown strength, permittivity, conductivity, dielectric loss, space charge accumulation, tracking, and erosion, and partial discharge. An overview of recent advances in polymer nanocomposites based on LDPE, HDPE, XLPE, and PVC is presented, focusing on their preparation and electrical properties.

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Performance of PVC/SiO2 nanocomposites under thermal ageing

Cited by 37 publications

References 22 publications

Thermal Stability of Nanosilica-Modified Poly(vinyl chloride)

Thermal Stability of Nanosilica-Modified Poly(vinyl chloride)

Grey Wolf Optimizer for Detecting Aging of Power Cables

Recent Advances in Polymer Nanocomposites Based on Polyethylene and Polyvinylchloride for Power Cables

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