The investigation of using magnesium hydroxide as a flame retardant in the cable insulation material by cross-linked polyethylene

Şener, Ahmet; Demirhan, Enver

doi:10.1016/j.matdes.2007.05.008

Cited by 64 publications

(37 citation statements)

References 3 publications

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“…Nowadays, halogen‐free flame retardant (HFFR) polymeric materials with low emission of poisonous gases have become prevalent in modern industries . Natural brucite is a unique mineral composed of more than 94 wt % of magnesium hydroxides, which can be used as HFFRs in polyethylene, polypropylene, ethylene‐vinyl acetate (EVA), and other polymers . However, the irregular shape, poor dispersion, and interfacial interaction of brucite lead to negative effects between the flame retardant (FR) and polymer matrix .…”

Section: Introductionmentioning

confidence: 99%

Controllable layer‐by‐layer assembly based on brucite and alginates with the assistance of spray drying and flame retardancy influenced by gradients of alginates

Wang

et al. 2019

J of Applied Polymer Sci

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With the aim of tailoring and controlling surface assembly, multifunctional flame retardants (FRs) were obtained based on depositing alginates and silane coupling agents on brucite via the spray-drying-assisted layer-by-layer assembly technique. The assembly was controllable in both structure and gradient mass. Two series of FRs were named CuFR1-3 and NiFR1-3 based on the assembly content of metal alginates. With the assistance of spray drying, good compatibility between FRs and ethylene-vinyl acetate (EVA) was obtained, resulting in better mechanical properties. Meanwhile, the FRs improved flame retardancy and smoke suppression when used in EVA composites. With 55 wt % loading, composites with CuFR3 and NiFR1 passed UL 94 V-0 rating, while those with brucite were not rated. The peak of heat release rate decreased by 51.7 and 49.3% while the residue increased by 9.8 and 11.9%, respectively. The FRs also reduced the smoke and CO production rates. For the two series of FRs, the relationship between FR efficiency and alginate contents is different. The CuFRs assembled more copper alginates and exerted better flame retardancy caused by lower catalytic graphitization. NiFRs exerted a higher catalyzing efficiency at low assembly content. However, at high assembly content, the catalytic graphitization effect would decrease by thermally oxidized degradation leading to excess nickel alginates.

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Section: Introductionmentioning

confidence: 99%

Controllable layer‐by‐layer assembly based on brucite and alginates with the assistance of spray drying and flame retardancy influenced by gradients of alginates

Wang

et al. 2019

J of Applied Polymer Sci

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“…Therefore, the suppression of charge is very important for long-term using of the dielectric materials. [5][6][7][8] Several mechanisms have been proposed to interpret the suppression of space charges in the nanocomposites. One is that the trap centers near the interface between the electrodes and the nanocomposites can capture the injected charges 9 .…”

Section: Introductionmentioning

confidence: 99%

Influence of hierarchy structure on electrical properties of gradient-distribution aluminum oxide/polyethylene nanocomposites

Wang

Zha

et al. 2016

Composites Science and Technology

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In the recent decades, the phenomena of space charge accumulation in the high voltage direct current (HVDC) insulation have attracted more and more attention. In this paper, the gradient-distribution multi-layered Al 2 O 3 /low density polyethylene (LDPE) nanocomposites were prepared via layer-by-layer melting blending and hot pressing method. Morphologies and electrical properties of these gradient-distribution structured composites were discussed. Results showed that this unique structure could largely enhance the breakdown strength of LDPE. The breakdown strength of the LDPE nanocomposites varied with nano-Al 2 O 3 concentrations, and it could reach to 200 kV/mm for the LDPE nanocomposites.Besides, space charge of the LDPE nanocomposites was measured by pulsed electro-acoustic (PEA) method. The charge profiles indicated that space charge suppression of the gradient-distribution multi-layered composites was better than that of the monolayer ones with general mean-distribution structure. Their excellent insulating properties were attributed to the trap which exists in the surface, and that could well inhibit the charge injecting into the materials.

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“…In many low density polyethylene products, aluminum trihydroxide and magnesium hydroxide are used as fire retardants (Liang et al 2013;El Hage et al 2014;Hoffendahl et al 2015a, b) because they have high decomposition temperatures and a low smoke release (Sener and Demirhan 2008). These hydroxides release water vapor to remove heat close to flames and reduce the formation of combustible gases.…”

Section: Introductionmentioning

confidence: 99%

Effect of PVDC on the Fire Performance of Ultra-Low Density Fiberboards (ULDFs)

Wu¹,

Chen²,

Huang³

et al. 2016

BioResources

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Poly vinylidene chloride-vinyl chloride emulsions (PVDC) were added as a substitute for chlorinated paraffin (CP) in the preparation of ultra-low density fiberboards (ULDFs). The micromorphology and fire performance of ULDFs were investigated using a scanning electron microscope, limiting oxygen index instrument, and cone calorimeter. The results showed that PVDC specimens were coated with a regularly smooth film, while the distribution of CP inside CP specimens was uneven. The limiting oxygen index increased with the dosage of PVDC, then reached a plateau at 50 mL and 28%, slightly higher than CP specimens (27.3%). The peak of heat release rate, mean heat release rate, mean CO, and total smoke release of PVDC specimens was reduced 43.3%, 13.5%, 38.5%, and 51.5% lower than respective CP specimens, and with nearly the same total heat release (only 0.04 MJ/m 2 higher). Thus, PVDC exhibited excellent heat-reducing and smoke-suppressing properties and could replace CP in ULDFs.

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The investigation of using magnesium hydroxide as a flame retardant in the cable insulation material by cross-linked polyethylene

Cited by 64 publications

References 3 publications

Controllable layer‐by‐layer assembly based on brucite and alginates with the assistance of spray drying and flame retardancy influenced by gradients of alginates

Controllable layer‐by‐layer assembly based on brucite and alginates with the assistance of spray drying and flame retardancy influenced by gradients of alginates

Influence of hierarchy structure on electrical properties of gradient-distribution aluminum oxide/polyethylene nanocomposites

Effect of PVDC on the Fire Performance of Ultra-Low Density Fiberboards (ULDFs)

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