Organosilicon surface layer on polyolefins to achieve improved flame retardancy through an oxygen barrier effect

Ravadits, I.; Tóth, A.; Marosi, Gy.; Márton, A.; Szép, A.

doi:10.1016/s0141-3910(01)00179-3

Cited by 91 publications

(46 citation statements)

References 5 publications

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“…Since EVA/IFR/1%4A shows maximum LOI value, therefore, this particular composite is used to study the combustion performance. Figures 4 and 5 shows the plots and the detailed information of combustion behavior for EVA/IFR and EVA/IFR/1%4A (with 1% wt 4A) obtained from the cone calorimeter test at a heat flux of 35 kW m 22 , and the data are listed in Table 4. The heat release rate (HRR) and total heat release (THR) are recognized to be the most important parameters to quantify the intensity of fires.…”

Section: Combustion Performance Of the Compositesmentioning

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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Section: Combustion Performance Of the Compositesmentioning

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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“…However, weight loss at the temperature area was usually observed for silicon-free polymers. [15][16][17][18][19]26,27] It indicates that the high temperature thermal stabilities of PP are improved by introducing silicon groups in PSiNII. The barrier properties of the expanded and thermal stability of the char are most effective in resisting the transport of heat and mass.…”

Section: Characterization By Pdscmentioning

confidence: 99%

“…[15] When silicon element is incorporated into the polymers, the weight loss of char at above 500 8C is retarded and the stability of char at high temperature is improved. [15][16][17][18] IFRs and silicon-containing compounds exhibited a synergistic effect on the flame retardancy of the polymer while they are used together. [3,7,19,20] On the other hand, the three ingredients often come from different compounds in IFRs, and the silicon-containing compounds also come from other compounds.…”

Section: Introductionmentioning

confidence: 99%

Thermal Degradation Behavior of Poly(propylene) with a Novel Silicon‐Containing Intumescent Flame Retardant

Jiang

Wei

2005

Macro Materials & Eng

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Summary: A novel intumescent flame retardant (PSiNII), containing silicon, phosphorus and nitrogen, has been synthesized and incorporated into poly(propylene) (PP). The flame retardancy of PP/PSiNII, evaluated by the limiting oxygen index (LOI) value, can be enhanced up to 29.5 vol.‐% from 17.4 vol.‐% with 20% total loading amount of PSiNII. The thermal degradation behavior of PP/PSiNII are investigated by thermogravimetric analysis (TGA) under nitrogen and air, and pressure differential scanning calorimetry (PDSC) under 1.5 MPa of oxygen. The PP/PSiNII‐3 degrades at 400 °C for different time, and the process is investigated by FTIR which indicates there is PO in the char. The morphologies of char formed at 400 °C for 10 min and after LOI test are investigated by scanning electron microscopy (SEM). The morphological structure of the char exhibits the swollen cells in the inner and a smooth outer surface, which do good to the thermal properties and fire performance of PP. The thermal stability of PP is improved by incorporating PSiNII.Inner surface of PP/PSiNII‐3 after LOI test.magnified imageInner surface of PP/PSiNII‐3 after LOI test.

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“…Meanwhile, fabricating superhydrophobic and flame-resistant surfaces of medium-density fibreboard also form an important link to overcome the drawbacks of the hydrogen bonds, which easily lose efficacy when contacted with water. In some special cases, superhydrophobic surfaces with flame-resistant properties are required, to be exact, a water contact angle (WCA) above 150° and a limiting oxygen index (LOI) that exceeds 21% (Ravadits et al 2001;Weil and Levchik 2008). Conventionally, the fire retardants are mixed with the hydrophobic polymers to prepare waterproof coatings with flame-resistant properties.…”

Section: Introductionmentioning

confidence: 99%

Novel Medium-density Fibreboard Produced by Ultrasonic-assisted Pulp with Superhydrophobic and Flame-Resistant Properties

Zhang

Xing

et al. 2017

BioResources

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A novel medium-density fibreboard produced by an ultrasonic-assisted wheat straw pulp (UWP) was obtained without adhesives. It was then coated with a superhydrophobic sol solution integrated with an in vitro addition of two fire retardants (polyhedral methyl-silsesquioxane and ammonium polyphosphate) during the process of sol-gel reaction involving the two silane precursors tetraethyl orthosilicate (TEOS) and tridecafluorooctyltriethoxysilane (FAS). The coated UWP medium-density fibreboard (UPB) had good strength properties and possessed excellent hydrophobicity (water contact angle (WCA) above 150°), and flameresistant properties (limiting oxygen index (LOI) improved by 5% compared with the original sample with a LOI of 18%). Meanwhile, the fibreboard also exhibited outstanding anti-permeability towards water (kept constant WCA for more than 1 h).

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Organosilicon surface layer on polyolefins to achieve improved flame retardancy through an oxygen barrier effect

Cited by 91 publications

References 5 publications

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

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

Thermal Degradation Behavior of Poly(propylene) with a Novel Silicon‐Containing Intumescent Flame Retardant

Novel Medium-density Fibreboard Produced by Ultrasonic-assisted Pulp with Superhydrophobic and Flame-Resistant Properties

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