Synergistic effect of carbon nanotubes in combination with magnesium hydroxide on the flame retardant poly(ethylene-co-vinyl acetate)

Li, Hongyan; Liu, Hongli; Li, Junwei; Tao, Sen; Li, Jing; Li, Po

doi:10.1515/secm-2014-0135

Science and Engineering of Composite Materials

2014

DOI: 10.1515/secm-2014-0135

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Synergistic effect of carbon nanotubes in combination with magnesium hydroxide on the flame retardant poly(ethylene-co-vinyl acetate)

Hongyan Li

Hongli Liu

Junwei Li

et al.

Abstract: To investigate the synergistic effect of carbon nanotubes (CNTs) in combination with magnesium hydroxide (MH) on the flame retardant poly(ethyleneco-vinyl acetate) (EVA), a series of EVA-based composites filled with CNTs, MH, a mixture of MH and CNTs, and MH-modified CNTs (MH-CNTs) were prepared. Characterizations of the fillers and the composites were performed by transmission electron microscopy, X-ray diffraction, Raman spectroscopy, thermogravimetric analysis, and cone calorimetry. The results indicated th… Show more

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Cited by 5 publications

References 25 publications

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Improving the fire performance and smoke suppression of expandable polystyrene foams by coating with multi‐dimensional carbon nanoparticles

Cao

Sun

et al. 2020

J of Applied Polymer Sci

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Expandable graphite (EG) and modified multi‐wall carbon nanotubes (ATH‐MWNT) were introduced to expandable polystyrene (EPS) foams in order to improve its fire performance. The fire performance of EPS foams was evaluated by limiting the oxygen index (LOI), vertical burning (UL‐94), and cone calorimetry tests. The results showed that the presence of 14.3% EG and 4.1% ATH‐MWNT increased the LOI value from 18.0 to 30.3%, upgraded the UL‐94 rating from no rating to V‐0, completely eliminated melt dripping, and significantly decreased the peak heat release rate from 933 to 177 kW/m2. Thermal analysis indicated that the thermal stability and char formation were improved by the presence of flame retardants. The char morphology was characterized by scanning electronic microscopy (SEM). It was suggested that the presence of EG and ATH‐MWNT could form integrated char layers during combustion, which was beneficial to the formation of an intumescent protective char structure.

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Improving the fire performance and smoke suppression of expandable polystyrene foams by coating with multi‐dimensional carbon nanoparticles

Cao

Sun

et al. 2020

J of Applied Polymer Sci

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Effect of layered double hydroxide on the flame retardancy of intumescent flame retardant thermoplastic polyurethane composites prepared by selective laser sintering

Zhang

et al. 2022

J of Applied Polymer Sci

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Presently, layered double hydroxides (LDHs) are pervasively adopted as part of flame retardant polymer composite materials due to its favorable synergism effect with certain flame retardants. In addition, it is environmentally friendly. Meanwhile, selective laser sintering (SLS) is a powder‐based three‐dimensional (3D) printing technology, providing a novel path to manufacturing polymer composite materials with complex shapes. In this research, flame retardancy of thermoplastic polyurethane (TPU) was enhanced based on LDHs and intumescent flame retardant (IFR). Being prepared by SLS technology. First, TPU composite powders based on LDHs and IFR were obtained using a two‐stage mixing method. Morphology analysis revealed that IFR and LDHs were dispersed uniformly in TPU powder. Subsequently, flame retardant TPU composites were prepared with TPU composite powders using the SLS process under appropriate 3D printing parameters, thereby enabling flame retardant TPU parts to be obtained. With 23 wt% IFR and 2 wt% LDHs filler, the limiting oxygen index of TPU composite was reached to 31.7%, while passing the UL‐94 V‐0 level during the vertical burning test. The cone calorimeter test showed that the heat release rate, smoke production rate, as well as production of carbonic oxides, all decreased significantly following the addition of LDHs. Thermogravimetric analysis indicated that LDHs and IFR were characterized by a favorable synergism effect, with the TPU/23IFR/2LDHs possessing good thermal stability. Char residue analysis, including SEM, energy dispersive X‐ray, Fourier transform infrared, and Raman spectra, further testified that a synergism effect existed between LDHs and IFR in the TPU composite. Overall, in this study the TPU composites fabricated by SLS technology exhibited excellent flame retardant ability.

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Investigations of the improved insulation properties of flame-retardant ethylene vinyl acetate copolymer in the presence of nanocalcined kaolin

Huang

Chen

et al. 2023

Polym. Bull.

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Synergistic effect of carbon nanotubes in combination with magnesium hydroxide on the flame retardant poly(ethylene-co-vinyl acetate)

Cited by 5 publications

References 25 publications

Improving the fire performance and smoke suppression of expandable polystyrene foams by coating with multi‐dimensional carbon nanoparticles

Improving the fire performance and smoke suppression of expandable polystyrene foams by coating with multi‐dimensional carbon nanoparticles

Effect of layered double hydroxide on the flame retardancy of intumescent flame retardant thermoplastic polyurethane composites prepared by selective laser sintering

Investigations of the improved insulation properties of flame-retardant ethylene vinyl acetate copolymer in the presence of nanocalcined kaolin

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