scholarly journals Optimization of the Mechanical Properties of Polyolefin Composites Loaded with Mineral Fillers for Flame Retardant Cables

Micro ◽  
2021 ◽  
Vol 1 (1) ◽  
pp. 102-119
Author(s):  
Sara Haveriku ◽  
Michela Meucci ◽  
Marco Badalassi ◽  
Camillo Cardelli ◽  
Giacomo Ruggeri ◽  
...  
Keyword(s):  
Flame Retardant ◽  
Vinyl Acetate ◽  
Weight Ratio ◽  
Fire Retardant ◽  
Ethylene Vinyl Acetate ◽  
Flame Retardant Properties ◽  
Electric Cables ◽  
Halogen Free ◽  
Mineral Fillers ◽  
Acetate Copolymer

Formulations based on mineral fillers and polymeric matrices of different nature were studied to obtain halogen-free flame retardant compounds (HFFR) for cable applications. The work was carried out by comparing fire-retardant mineral fillers of natural origin with synthetic mineral ones available on the market. As a reference, a formulation based on micronized natural magnesium hydroxide (n-MDH, obtained from brucite) and an ethylene-vinyl acetate copolymer with 28% by weight (11% by moles) of vinyl acetate were selected, and the mechanical and flame retardant properties compared with formulations based on secondary polymers combined with EVA, metal hydroxides, and carbonates. Notably, we found a synergistic effect in the mechanical, rheological and flame retardant properties for the composite containing a mixture of n-MDH and boehmite in a 3:1 weight ratio. Overall, the present work provided a complete and optimized recipe for the formulation of polymer composites characterized by the required flame retardant and mechanical features in electric cables applications.

scholarly journals ОПТИМІЗАЦІЯ ЕКСПЛУАТАЦІЙНИХ ВЛАСТИВОСТЕЙ ВОГНЕЗАХИСНОГО ПОЛІМЕРНОГО ІНТУМЕСЦЕНТНОГО ПОКРИТТЯ

2020 ◽  
Vol 138 (5) ◽  
pp. 79-86
Author(s):  
Н. А. Таран ◽  
К. В. Калафат ◽  
Л. І. Вахітова ◽  
В. П. Плаван
Keyword(s):  
Flame Retardant ◽  
Vinyl Acetate ◽  
Expansion Coefficient ◽  
Water Resistance ◽  
Ethylene Vinyl Acetate ◽  
Complex Compounds ◽  
Intumescent Coatings ◽  
Flame Retardant Properties ◽  
Acetate Copolymer ◽  
Ethylene Vinyl Acetate Copolymer

Study of the effect of intumescent complex compounds on the basis of aminoderivatives of 2,4,8,10-tetraoxа-3,9-diphosphaspiro[5,5] undecane on the flame retardant properties and water resistance of the ethylene vinyl acetate copolymer in the flame retardant polymer compositions. The structure of intumescent compounds has been confirmed by the methods of elemental analysis and IR spectroscopy, the flame retardant properties of the intumescent systems have been investigated using the method of thermogravimetric analysis. Methods of synthesis of intumescent compounds based on 2,4,8,10-tetraoxа-3,9-diphosphaspiro[5,5]undecane and urea, melamine, dicyandiamidе and mixtures there of have been developed. The synthesized compounds have been shown to enhance the flame retardant properties of the ethylene vinyl acetate copolymer, exhibit an intumescent effect and participate in the construction of a char thermal insulation layer. It has been shown that the water resistance of fire retardant systems with the participation of intumescent complex compounds is much higher than the systems of ammonium polyphosphate / melamine / pentaerythritol composition. The expansion coefficient of intumescent systems containing of intumescent compounds to decrease by 10 - 20% after hydrothermal effects, while, as the expansion coefficient of the traditional intumescent system  in the same conditions is reduced by 40%. According to the results of accelerated hydrothermal tests, the stability of polymeric intumescent coatings with the participation of intumescent complex compounds to the action of moisture under conditions of temperature difference was determined. The obtained results indicate the prospect of using the investigated intumescent compounds for the creation of new technologies of intumescent coatings for wood with a long operation life.

Flame-retardant properties of ethylene-vinyl acetate/oil sludge/ fumed silica composites

RSC Advances ◽  
2016 ◽  
Vol 6 (67) ◽  
pp. 63091-63098 ◽  
Author(s):  
Yi Qian ◽  
Xiaoyan Zhu ◽  
Shanshan Li ◽  
Xilei Chen
Keyword(s):  
Flame Retardant ◽  
Vinyl Acetate ◽  
Fumed Silica ◽  
Ethylene Vinyl Acetate ◽  
Raw Material ◽  
Oil Sludge ◽  
Flame Retardant Properties

Ethylene-vinyl acetate (EVA)/oil sludge (OS)/fumed silica (SiO2) composites were synthesized using OS containing CaCO3as raw material.

Enhanced fire-retardancy of poly(ethylene vinyl acetate) electrical cable coatings containing microencapsulated ammonium polyphosphate as intumescent flame retardant

RSC Advances ◽  
2016 ◽  
Vol 6 (88) ◽  
pp. 85564-85573 ◽  
Author(s):  
Yan Zhang ◽  
Bibo Wang ◽  
Haibo Sheng ◽  
Bihe Yuan ◽  
Bin Yu ◽  
...  
Keyword(s):  
Flame Retardant ◽  
Vinyl Acetate ◽  
Ethylene Vinyl Acetate ◽  
Fire Retardancy ◽  
Electrical Cable ◽  
Fire Hazards ◽  
Poly Ethylene ◽  
Microencapsulated Ammonium Polyphosphate ◽  
Acetate Copolymer ◽  
Ethylene Vinyl Acetate Copolymer

There is a need to improve and maintain the protection function of ethylene-vinyl acetate copolymer (EVA) cable materials from ageing degradation to avoid fire hazards and extend their service lives.

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