Thermal Degradation and Combustion Mechanism of EVA-Magnesium Hydroxide-Zinc Borate

Bourbigot, Serge; Carpentier, Fabien; Bras, Michel Le

doi:10.1021/bk-2001-0797.ch014

Cited by 10 publications

(6 citation statements)

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“…With all the above aspects, burning rate of the polymeric matrix is decelerated. [28] Weight loss of the ethylene-vinyl acetate/layered double hydroxides/zinc borate composites. Figure 4 presents the weight of the char residues of the composites during CCT.…”

Section: Cone Calorimeter Test Of the Ethylene-vinyl Acetate/layered mentioning

confidence: 99%

Flammability and thermal degradation behavior of ethylene‐vinyl acetate/layered double hydroxides/zinc borate composites

Qian

Zhou

Chen

2016

Polymers for Advanced Techs

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Mg‐Al‐Fe ternary‐layered double hydroxides (LDHs) were synthesized by a calcination‐rehydration method using Bayer red mud. The products were characterized using X‐ray diffraction and thermogravimetric analysis. The flammability and thermal degradation of ethylene‐vinyl acetate/layered double hydroxides/zinc borate (EVA/LDHs/ZB) composites were studied with limiting oxygen index, UL 94, cone calorimeter test, smoke density test, and thermogravimetry‐Fourier transform infrared spectrometry. Although limiting oxygen index value of the composites decreased with increasing ZB amount, a suitable addition of ZB can apparently improve the UL 94 rating of the material. The heat release rate of the 5% ZB containing ternary composites decreased compared with the EVA/LDHs composites. It is obtained from smoke density test that ZB could help smoke suppression. The ternary composites possessed a higher thermal stability than the EVA/LDHs composites. Copyright © 2016 John Wiley & Sons, Ltd.

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Section: Cone Calorimeter Test Of the Ethylene-vinyl Acetate/layered mentioning

confidence: 99%

Flammability and thermal degradation behavior of ethylene‐vinyl acetate/layered double hydroxides/zinc borate composites

Qian

Zhou

Chen

2016

Polymers for Advanced Techs

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“…3(a), show that ZnAlborate gives a residue of 75% while the MgAl-borate gives about 67% and this is reasonable since Zn is heavier than Mg. Thermal degradation of EVA in air has been studied extensively and is known to proceed by a three-step process [26], [27], [28], [29] . The first step (250-400 °C) is due to the loss of acetic acid from the decomposition of the vinyl acetate group, while the second step (400-500 °C) is assigned to the degradation of the unsaturated polyethylenic chains.…”

Section: Thermal Stability Of the Mg/zn-al Ldhs And Their Ethylene VImentioning

confidence: 99%

Layered double hydroxides intercalated with borate anions: Fire and thermal properties in ethylene vinyl acetate copolymer

Nyambo

Wilkie

2009

Polymer Degradation and Stability

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“…Nevertheless, its fatal disadvantages are low flame retardant efficiency and high loading level (up to more than 60 wt %), which are detrimental to the mechanical properties, , especially strength in polymer composites containing brucite filler. Consequently, to obtain better comprehensive properties, great efforts have been made on brucite incorporated with other synergistic agents − to improve the mechanical properties and flame resistance of polymer composites. One potential strategy is to mix brucite and zinc borates as HFFR. ,,,, …”

Section: Introductionmentioning

confidence: 99%

“…Consequently, to obtain better comprehensive properties, great efforts have been made on brucite incorporated with other synergistic agents − to improve the mechanical properties and flame resistance of polymer composites. One potential strategy is to mix brucite and zinc borates as HFFR. ,,,, …”

Section: Introductionmentioning

confidence: 99%

“…Zinc borates have been reported as potential fillers to retard the thermal degradation of polymers because of their high thermal stability. − Previous studies demonstrated that there are major advantages and synergistic effects in using a combination of zinc borates with brucite in polymers. ,, As a result, zinc borates form a glassy cage for polymer chains as a physical barrier, which is benefit to the flame retardancy. However, these synergistic effects are based on simple physical mixing of zinc borates and brucite.…”

Section: Introductionmentioning

confidence: 99%

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Controllable Fabrication of Zinc Borate Hierarchical Nanostructure on Brucite Surface for Enhanced Mechanical Properties and Flame Retardant Behaviors

Wang

Pang

Chen

et al. 2014

ACS Appl. Mater. Interfaces

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A novel and efficient halogen-free composite flame retardant (CFR) consisting of a brucite core and a fine zinc borate [Zn6O(OH)(BO3)3] hierarchical nanostructure shell was designed and synthesized via a facile nanoengineering route. It had been demonstrated that this unique hybrid structure possessed a high BET specific surface area (65 m(2)/g) and could significantly enhance the interfacial interaction when mixing with ethylene-vinyl acetate (EVA). This improved the transfer of stress between CFR particles and EVA matrix and increased the viscosity of EVA/EVA blends, which was beneficial for droplet inhibition and char forming. The mechanical properties and flammability behaviors of the EVA/CFR blends had been compared with the EVA/physical mixture (PM, with the given proportion of brucite and Zn6O(OH)(BO3)3). The mechanical properties of EVA/CFR blends, especially the tensile strength (TS), presented a remarkable increase reaching at least a 20% increment. Meanwhile, with the same 45 wt % of fillers, the EVA/CFR formulation could achieve a limiting oxygen index (LOI) value of 33 (37.5 % higher than that of EVA/PM blends) and UL-94 V-0 rating. Moreover, the heat release rate (HRR), peak heat release rate (PHRR), total heat released (THR), smoke production rate (SPR) and mass loss rate (MLR) were considerably reduced, especially PHRR and SPR for EVA/CFR blends were reduced to 32%. According to this study, the design of fine structure might pave the way for the future development of halogen-free flame retardants combining both enhanced mechanical properties and excellent flame retardant behaviors.

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Thermal Degradation and Combustion Mechanism of EVA-Magnesium Hydroxide-Zinc Borate

Cited by 10 publications

References 0 publications

Flammability and thermal degradation behavior of ethylene‐vinyl acetate/layered double hydroxides/zinc borate composites

Flammability and thermal degradation behavior of ethylene‐vinyl acetate/layered double hydroxides/zinc borate composites

Layered double hydroxides intercalated with borate anions: Fire and thermal properties in ethylene vinyl acetate copolymer

Controllable Fabrication of Zinc Borate Hierarchical Nanostructure on Brucite Surface for Enhanced Mechanical Properties and Flame Retardant Behaviors

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