Usability of three boron compounds for enhancement of flame retardancy in polyethylene-based cable insulation materials

Date

2014-03-01

Author

İBİBİKCAN, Esin
Kaynak, Cevdet

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

282
views

0
downloads

It is known that for the production of halogen-free cable insulation materials based on polyethylene, very high amounts of traditional metal hydroxide flame retardants such as 65 wt% aluminum hydroxide are required to fulfill international directives. In this respect, the aim of this study was to reveal possible enhancement effects of three boron compounds on the flame retardancy of two cable insulation materials: low-density polyethylene and its blend with ethylene vinyl acetate both loaded with aluminum hydroxide. For this purpose, a certain fraction of aluminum hydroxide was replaced with various amounts of zinc borate, boron oxide, and boric acid. The materials were compounded by the melt mixing method with a twin-screw extruder, while specimens were shaped by compression and injection molding. Limiting oxygen index, UL-94 vertical burning and mass loss cone calorimeter analyses indicated that replacement of certain amount of aluminum hydroxide with boron compounds could lead to certain levels of enhancement in many flame retardancy parameters. Residue analyses revealed that these improvements were basically due to further contribution of boron compounds to the physical barrier mechanism of aluminum hydroxide in both gas and condensed phases.

Subject Keywords

Mechanical Engineering, Mechanics of Materials, Safety, Risk, Reliability and Quality

URI

https://hdl.handle.net/11511/42087

Journal

JOURNAL OF FIRE SCIENCES

DOI

https://doi.org/10.1177/0734904113500125

Collections

Department of Metallurgical and Materials Engineering, Article

Suggestions

OpenMETU
Core

Corrosion Resistance Studies of Austenitic Stainless Steel Grades in Molten Zinc-Aluminum Alloy Galvanizing Bath Loto, Roland Tolulope; Ozcan, Emre (Springer Science and Business Media LLC, 2016-06-01) The corrosion inhibition performance and mechanical behavior of galvanized and heat-treated four newly developed austenitic stainless steel grades and type 316L austenitic stainless steel for application as sink rolls in galvanizing baths of 0.14-0.21 wt.% aluminum was investigated and compared through immersion corrosion test to determine the weight loss between 168 and 504 h, tensile test, and Charpy impact test. The delta ferrite content of the test samples was observed and estimated through optical micr...
Halogen-free Flame Retardants that Outperform Halogenated Counterparts in Glass Fiber Reinforced Polyamides Isitman, Nihat Ali; GÜNDÜZ, Huseyin Ozgur; Kaynak, Cevdet (SAGE Publications, 2010-01-01) Flammability, fire performance, and thermal stability of short glass fiber reinforced polyamide-6 and polyamide-66 containing halogenated and halogen-free flame retardants (FRs) were compared. Flammabilities were assessed by limiting oxygen index tests and UL94 classifications. Fire behavior was evaluated by mass loss cone calorimetry, a bench-scale tool, to assess fire performance of materials. Halogen-free, phosphorus-based FRs were shown to perform superior to halogenated counterparts on the basis of imp...
Titanium-magnesium based composites: Mechanical properties and in-vitro corrosion response in Ringer's solution ESEN, ZİYA; Dikici, Burak; Duygulu, Ozgur; Dericioğlu, Arcan Fehmi (Elsevier BV, 2013-06-20) Ti-Mg composite rods exhibiting both bioinert and biodegradable characteristics have been manufactured by hot rotary swaging from elemental powders of titanium and magnesium. As a result of processing, spherical magnesium powders elongated in the direction of deformation and the dendritic structure in starting magnesium powders transformed into highly equiaxed grains. Magnesium particles in the outer layer of the composites were decorated by thin layer of MgO while the interior parts were free from oxides. ...
Nanowires assembled from iron manganite nanoparticles: Synthesis, characterization, and investigation of electrocatalytic properties for water oxidation reaction Çetin, Asude; Önal, Ahmet Muhtar; Nalbant Esentürk, Emren (Cambridge University Press (CUP), 2019-09-30) The development of stable and effective earth-abundant metal oxide electrocatalysts is very crucial to improve competence of water electrolysis. In this study, iron manganite (FeMnO3) nanomaterials were synthesized as an affordable electrocatalyst for water oxidation reactions. The structural and chemical properties of FeMnO3 nanomaterials were studied by transmission electron microscopy, scanning electron microscopy, energydispersive X-ray, X-ray diffraction, X-ray photoelectron spectroscopy, inductively c...
Polystyrene / boron nitride nanotube composites: synthesis, processing and characterization Balık, Erdem; Bayram, Göknur; Sezgi, Naime Aslı; Department of Chemical Engineering (2015) In recent years, boron nitride nanotubes (BNNTs) have been added to polystyrene (PS) which is a widely used thermoplastic polymer in order to improve its thermal and mechanical properties. Solution mixing and melt blending techniques are commonly used methods to prepare polymer-boron nitride nanotube (BNNT) composites. However, these two composite preparation methods have a common problem about the dispersion of fillers in the polymer matrix. In this study, PS-BNNT composites were prepared using masterbatch...

Citation Formats

E. İBİBİKCAN and C. Kaynak, “Usability of three boron compounds for enhancement of flame retardancy in polyethylene-based cable insulation materials,” JOURNAL OF FIRE SCIENCES, pp. 99–120, 2014, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/42087.