Synergistic flame-retardant effect between calcium hydroxide and zinc borate in ethylene-vinyl acetate copolymer (EVA)

2017 ◽  
Vol 144 ◽  
pp. 315-324 ◽  
Author(s):  
Mohamed Amine Oualha ◽  
Noureddine Amdouni ◽  
Fouad Laoutid
Keyword(s):  
Flame Retardant ◽  
Calcium Hydroxide ◽  
Vinyl Acetate ◽  
Ethylene Vinyl Acetate ◽  
Zinc Borate ◽  
Synergistic Flame Retardant ◽  
Acetate Copolymer ◽  
Ethylene Vinyl Acetate Copolymer

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.

scholarly journals Enhanced Flame Retardancy in Ethylene–Vinyl Acetate Copolymer/Magnesium Hydroxide/Polycarbosilane Blends

Polymers ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 36
Author(s):  
Tiefeng Zhang ◽  
Chunfeng Wang ◽  
Yongliang Wang ◽  
Lijun Qian ◽  
Zhidong Han
Keyword(s):  
Synergistic Effect ◽  
Flame Retardant ◽  
Vinyl Acetate ◽  
Magnesium Hydroxide ◽  
Ethylene Vinyl Acetate ◽  
Infrared Spectrometry ◽  
Limiting Oxygen Index ◽  
Blending Method ◽  
Acetate Copolymer ◽  
Ethylene Vinyl Acetate Copolymer

A polymer ceramic precursor material—polycarbosilane (PCS)—was used as a synergistic additive with magnesium hydroxide (MH) in flame-retardant ethylene–vinyl acetate copolymer (EVA) composites via the melt-blending method. The flame-retardant properties of EVA/MH/PCS were evaluated by the limiting oxygen index (LOI) and a cone calorimeter (CONE). The results revealed a dramatic synergistic effect between PCS and MH, showing a 114% increase in the LOI value and a 46% decrease in the peak heat release rate (pHRR) with the addition of 2 wt.% PCS to the EVA/MH composite. Further study of the residual char by scanning electron microscopy (SEM) proved that a cohesive and compact char formed due to the ceramization of PCS and close packing of spherical magnesium oxide particles. Thermogravimetric analysis coupled with Fourier-transform infrared spectrometry (TG–FTIR) and pyrolysis–gas chromatography coupled with mass spectrometry (Py–GC/MS) were applied to investigate the flame-retardant mechanism of EVA/MH/PCS. The synergistic effect between PCS and MH exerted an impact on the thermal degradation products of EVA/MH/PCS, and acetic products were inhibited in the gas phase.

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