Synergistic effects of modified hydrotalcite on improving the fire resistance of ethylene vinyl acetate containing intumescent flame retardants

2016 ◽  
Vol 39 (2) ◽  
pp. 522-528 ◽  
Author(s):  
Sheng Zhang ◽  
Wufei Tang ◽  
Jun Sun ◽  
Yu Jiang ◽  
Xiangxing Bu ◽  
...  
Keyword(s):  
Vinyl Acetate ◽  
Fire Resistance ◽  
Flame Retardants ◽  
Synergistic Effects ◽  
Ethylene Vinyl Acetate ◽  
Intumescent Flame Retardants

Thermal Degradation Behavior of Polypropylene and Ethylene Vinyl Acetate Copolymer Treated with Intumescent Flame Retardants Containing Caged Bicyclic Phosphates

2014 ◽  
Vol 936 ◽  
pp. 17-22
Author(s):  
Xin Li ◽  
Yu Xiang Ou
Keyword(s):  
Thermal Degradation ◽  
Vinyl Acetate ◽  
Flame Retardants ◽  
Ethylene Vinyl Acetate ◽  
Formation Mechanisms ◽  
Thermal Degradation Behavior ◽  
Flame Retarded ◽  
Intumescent Flame Retardants ◽  
Acetate Copolymer ◽  
Ethylene Vinyl Acetate Copolymer

Polypropylene (PP) and ethylene vinyl acetate copolymer (EVA) were treated with intumescent flame retardants containing caged bicyclic phosphates. The behavior of thermal degradation of the flame-retarded PP and EVA were studied by TG, DSC, and the FTIR spectra of PP’s residues at different temperature were recorded. In addition, the possible thermal degradation and char formation mechanisms were analyzed and discussed.

Synergistic Effects of Nanoporous Nickel Phosphates VSB-1 on Intumescent Flame Retardant Polypropylene Composites

2014 ◽  
Vol 881-883 ◽  
pp. 863-866
Author(s):  
Chao Peng ◽  
Shi Bin Nie ◽  
Lei Liu ◽  
Qi Lin He ◽  
Yuan Hu ◽  
...  
Keyword(s):  
Heat Release ◽  
Flame Retardant ◽  
Flame Retardants ◽  
Synergistic Effects ◽  
Intumescent Flame Retardant ◽  
Total Heat Release ◽  
Cone Calorimetry ◽  
Polypropylene Composites ◽  
Intumescent Flame Retardants ◽  
Nickel Phosphates

Nanoporous nickel phosphates (VSB-1) was synthesized by hydrothermal method. Then VSB-1 was added to the ammonium polyphosphate and pentaerythritol system in polypropylene (PP) matrix.The synergistic effect of VSB-1 with intumescent flame retardants (IFR) was studied by cone calorimetry test. The results of cone calorimetry show that heat release rate peak (pHRR) and total heat release (THR) of intumescent flame retardant PP with 2wt% VSB-1 decrease remarkably compared with that of without VSB-1. The pHRR and THR decrease respectively from 1140 to 286.0 kW/m2, and from 96.0 to 63.2 MJ/m2.

scholarly journals Fire retardancy of ethylene-vinyl acetate composites – Evaluation of synergistic effects between ATH and diatomite fillers

2016 ◽  
Vol 129 ◽  
pp. 246-259 ◽  
Author(s):  
Florian Cavodeau ◽  
Belkacem Otazaghine ◽  
Rodolphe Sonnier ◽  
José-Marie Lopez-Cuesta ◽  
Christelle Delaite
Keyword(s):  
Vinyl Acetate ◽  
Synergistic Effects ◽  
Ethylene Vinyl Acetate ◽  
Fire Retardancy

scholarly journals Comparing the effect of nanoclays on the water-resistance of intumescent fire-retardant coatings

2021 ◽  
Vol 3 (6 (111)) ◽  
pp. 59-70
Author(s):  
Liubov Vakhitova ◽  
Kostyantyn Kalafat ◽  
Viktoriia Plavan ◽  
Volodymyr Bessarabov ◽  
Nadezhda Тaran ◽  
...  
Keyword(s):  
Vinyl Acetate ◽  
Fire Resistance ◽  
Water Resistance ◽  
Fire Retardant ◽  
Ethylene Vinyl Acetate ◽  
Ammonium Polyphosphate ◽  
Properties Of Coatings ◽  
Decay Period ◽  
Intumescent Coatings ◽  
Organically Modified

This paper reports a study into the effect of nanoclays on the water-resistance of the intumescent system ammonium polyphosphate/melamine/pentaerythritol/titanium dioxide/polymer (ethylene vinyl acetate (EVA) or styrene acrylate (SA). It has been established that adding nanoclay to a coating based on ethylene vinyl acetate increases the fire resistance limit of a metal plate by 30 %, and to a coating based on styrene acrylate – by 50 %. At the same time, coatings that include the EVA polymer are characterized by greater fire-retardant efficiency and less water resistance than coatings containing the SA polymer. It has been shown that intumescent coatings, regardless of the nature of the polymer, under the conditions of 80 % humidity over 800 days their reduce fire-protective properties by an average of 10 %. The loss of coating fire resistance occurs due to the leaching of pentaerythritol, ammonium polyphosphate, and polymer degradation by hydrolysis. The admixtures of nanoclays with a high degree of exfoliation to the studied system create a barrier effect and maximize the chemical formulation of the intumescent coating. The fireproof properties of coatings with organically-modified montmorillonite admixtures are maintained or reduced to 5 % under the conditions of 80 % humidity over 800 days. It has been determined that the direct effect of water on the coating over a period of more than 2 days leads to a significant decrease in the swelling coefficient of intumescent coatings, regardless of the content of a nanoclay admixture in their composition. At the same time, the half-decay period of coatings without nanoclay, calculated on the basis of solubility constant in water, is 0.5 days. For coatings, which include the admixtures of organically-modified nanoclays, the half-decay period increases to 2 days. The results reported in this paper could be recommended for designing water-proof fire-resistant reactive-type nano-coatings with prolonged service life.

scholarly journals Effects of Aluminum Hydroxide and Layered Double Hydroxide on Asphalt Fire Resistance

Materials ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 1939 ◽  
Author(s):  
Menglin Li ◽  
Ling Pang ◽  
Meizhu Chen ◽  
Jun Xie ◽  
Quantao Liu
Keyword(s):  
Carbon Monoxide ◽  
Layered Double Hydroxide ◽  
Aluminum Hydroxide ◽  
Fire Resistance ◽  
Flame Retardants ◽  
Synergistic Effects ◽  
Combined System ◽  
Limiting Oxygen Index ◽  
Double Hydroxide ◽  
The Impact

When a fire occurs in a tunnel, the instantaneous high temperature and smoke cause great danger to people. Therefore, the asphalt pavement material in the tunnel must have sufficient fire resistance. In this study, the effects of aluminum hydroxide and layered double hydroxide on the fire resistance of styrene-butadiene-styrene (SBS) polymer-modified asphalt was investigated. The fire resistance of the asphalt was evaluated by using a limiting oxygen index (LOI). The impact of aluminum hydroxide (ATH), layered double hydroxide (LDHs), and mixed flame retardant (MFR) on LOI was studied. The synergistic fire resistance mechanism of ATH and LDHs in asphalt binder was analyzed by using an integrated thermal analyzer‒mass spectrometry combined system (TG-DSC-MS) and Fourier transform infrared spectrometer (FTIR). The experimental results indicated that the main active temperature range of these flame retardants was 221–483 °C. The main components of smoke were methane, hydroxyl, water, carbon monoxide, aldehyde, carbon dioxide, etc. The addition of flame retardants could inhibit the production of methane, carbon monoxide, and aldehyde. Moreover, due to the good synergistic effects of ATH and LDHs, 20 wt % MFR had the best fire resistance.

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