Synergistic Effect of the Charring Agent on the Thermal and Flame Retardant Properties of Polyethylene

Hu, Xiaoping; Li, Yalan; Wang, Yu‐Zhong

doi:10.1002/mame.200300189

Cited by 143 publications

(100 citation statements)

References 15 publications

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“…For the char of sample F2.5C2. was observed in the char of M0A0.5, which is attributed to P-O-C stretching 30,31 . During the burning process, APP is firstly decomposed into poly(phosphoric acid) and then it reacts with the hydroxyl group on cellulose through esterification.…”

Section: Ftir-atr Spectra and Analysismentioning

confidence: 95%

Green bio-based aerogels prepared from recycled cellulose fiber suspensions

Wang

Sánchez‐Soto

2015

RSC Adv.

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Recycled cellulose fibers (RCF) from waste paper were utilized to prepare bio-based aerogels through an environmentally friendly freeze-drying method. Food thickening agent sodium carboxymethyl cellulose (CMC) served as matrix in the bio-aerogels. The microstructures and mechanical properties of the aerogels have been studied as a function of RCF/CMC content. Sodium montmorrilonite (Na + -MMT) and ammonium polyphosphate (APP) were added to enhance the thermal stability and flame retardancy, which were investigated by thermogravimetric analysis (TGA) and cone calorimeter respectively. It was found that the Na + -MMT significantly improved the fire retardancy of the aerogels and APP played a synergistic effect with it. The initial decomposition temperature increased by 15 o C and the peak of heat release rate decreased from 90 to 49.5 kw/m 2 in the presence of 33% clay. Addition of APP further increased the residue amount and reduced the fire growth rate. Fourier transform infrared spectroscopy (FTIR) was used to analyse the char formed after cone calorimeter tests.

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Section: Ftir-atr Spectra and Analysismentioning

confidence: 95%

Green bio-based aerogels prepared from recycled cellulose fiber suspensions

Wang

Sánchez‐Soto

2015

RSC Adv.

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“…The development of oligomeric or polymeric IFRs with high molecular weight can provide a sound solution to the drawbacks of IFRs [11,12]. Investigations have focused on triazine derivates which acted as efficient charring agents in IFR, which originates from the presence of the tertiary nitrogen in the triazine rings [13].…”

Section: Introductionmentioning

confidence: 99%

Synergistic effects of 4A zeolite on the flame‐retardant properties and thermal stability of an efficient halogen‐free flame‐retardant EVA composite

Huang

Liang

Cao

et al. 2016

Polymer Engineering & Sci

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The synergistic effects of 4A zeolite (4A) on the thermal degradation, flame retardancy, and char formation of an efficient halogen-free flame-retardant ethylene-vinyl acetate copolymer composite (EVA/IFR) were investigated by limited oxygen index (LOI), vertical burning test (UL-94), cone calorimeter test (CCT), digital photography, scanning electron microscopy (SEM), energy dispersive spectrometry (EDS), laser Raman spectroscopy (LRS) and thermogravimetric analytical (TGA) methods. It was found that a small amount of 4A clearly improved the LOI value of the EVA/IFR composite and reinforced the fire retardant performance with a great reduction in the combustion parameters of the EVA/IFR system from the CCT test. The entire composites passed the UL-94 V-0 rating test. The TGA and integral procedure decomposition temperature (IDPT) results showed that 4A enhanced the thermal stability of the EVA/IFR system and increased the char residue content effectively. The morphological structures observed by digital and SEM imaging revealed that 4A could promote EVA/IFR to form a more continuous and compact intumescent char layer. The LRS and EDS results demonstrated that by introduction of 4A into the EVA/IFR system, a more graphite structure was formed with increase phosphorus content in the char residue. POLYM.ENG. SCI., 56:380-387,

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“…Halogen compounds are generally recognized as effective flame retardants for polymeric materials, because they often exhibit excellent fire-retardant properties. However, the corrosiveness 100 C. WENGUANG, G. YANLEI AND G. FEN and toxicity of smoke and other emission products generated during the combustion of halogencontaining thermoplastics have given rise to some concern [3][4][5][6][7]. At present, a large variety of nontoxic materials have been studied, such as aluminum trihydrate, magnesium hydroxide, and phosphorous compounds [8][9][10][11][12][13], which began to replace halogen compounds as flame retardants and smoke suppressant fillers for thermoplastics.…”

Section: Introductionmentioning

confidence: 99%

Toughening study of fire‐retardant high‐impact polystyrene

2009

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SUMMARYFire-retardant high-impact polystyrene (HIPS) was modified by melt blending with varying amounts of three types of tougheners. The effects of the tougheners on the properties of the fire-retardant HIPS were studied by mechanical, combustion tests, and thermogravimetric analysis. The morphologies of fracture surfaces and char layers were characterized through scanning electron microscopy. The results show that the impact properties of styrene-butadiene-styrene (SBS)-containing composites were better than those of ethylene-propylene-diene monomer (EPDM)-containing or ethylene-vinyl acetate copolymer (EVA)-containing composites. The tensile strength and flexural modulus of the fire-retardant HIPS decreased evidently with the addition of tougheners. It is found that the compatibility between SBS copolymer and HIPS matrix was best among the three types of tougheners. The addition of SBS had little influence on the thermal property, residue, flammability, and morphology of char layer of the fire-retardant HIPS, but the addition of EPDM rubber or EVA brought adverse influence on the residue, flammability, and morphology of char layer of the fire-retardant HIPS, especially for EPDM.

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Synergistic Effect of the Charring Agent on the Thermal and Flame Retardant Properties of Polyethylene

Cited by 143 publications

References 15 publications

Green bio-based aerogels prepared from recycled cellulose fiber suspensions

Green bio-based aerogels prepared from recycled cellulose fiber suspensions

Synergistic effects of 4A zeolite on the flame‐retardant properties and thermal stability of an efficient halogen‐free flame‐retardant EVA composite

Toughening study of fire‐retardant high‐impact polystyrene

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