Improving flame retardancy of PP/MH/RP composites through synergistic effect of organic CoAl-layered double hydroxide

Zheng, Liang; Wu, Ting; Kong, Qinghong; Zhang, Junhao; Liu, Hong

doi:10.1007/s10973-017-6231-6

Cited by 20 publications

(3 citation statements)

References 35 publications

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“…[39] LDHs, as flame-retardant fillers alone, not only have good flame retardant properties, but also exhibit excellent flame retardancy when used in conjunction with other flame retardants. [40,41] NiAl-LDH was synthesized via co-precipitation and modified by sodium dodecyl sulfate, marked as NiAl-OLDH. The results indicated that incorporation of NiAl-OLDH in PP/IFR composites improved significantly the thermal stability, flame retardancy and smoke suppression properties.…”

Section: General Chemistrymentioning

confidence: 99%

High Performance Layered Inorganic Flame Retardants: a Review

Su¹,

Tang²,

Xie³

et al. 2019

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Layered inorganic compounds are potential flame retardant materials with good flame retardant performance. In particular, inorganic composites or inorganic-organic hybrids may be a promising candidate of flame retardants. This review introduces the thermal stability, flame retardancy, smoke suppression and their mechanism of layered inorganic-based flame retardants. The results indicate that the incorporation of layered inorganic based flame retardants can improve the thermal stability and residual yield at high temperature, flame retardancy and smoke suppression. The improved flame retardancy and smoke suppression performances were mainly ascribed to layered inorganic based flame retardants with excellent lamellar barrier effect and outstanding catalytic carbonization performance, which was propitious to form compact and stiff carbonaceous ceramic layer, and suppressed efficiently the heat and mass transmission between polymer nanocomposites and flame zone.

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Section: General Chemistrymentioning

confidence: 99%

High Performance Layered Inorganic Flame Retardants: a Review

Su¹,

Tang²,

Xie³

et al. 2019

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“…In recent years, transition metals and phosphorus-containing compounds have been found to have excellent ability to catalyze the formation of char and catalyze the conversion of harmful substances, arousing wide attention of researchers (Zheng et al, 2017;Sun et al, 2018;Feng et al, 2019;Kong et al, 2019a;Zhang et al, 2019;Zhou et al, 2019). A new flame retardant (P-MnMo 6 ) was synthesized with 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) with polyoxometalate and added to EP (Peng et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Effect of Graphene Oxide–Modified Cobalt Nickel Phosphate on Flame Retardancy of Epoxy Resin

et al. 2020

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Synergistic effect is an effective strategy for improving the flame retardancy of epoxy resin (EP). In this work, a novel graphene oxide-cobalt nickel phosphate (GO-NiCoPO 3) is successfully synthesized, which is incorporated into an EP matrix for preparing EP/GO-NiCoPO 3 nanocomposites. The results show that the limiting oxygen index value of EP/ 4GO-NiCoPO 3 nanocomposites is as high as 30.3%, and UL-94 can reach V-1 rating. The results of micro-combustion calorimetry indicate that the total heat release value and peak of heat release rate of EP/8GO-NiCoPO 3 nanocomposites are decreased by 41.9 and 23.8% compared with those of pure EP. This is mainly due to the synergistic barrier effect of GO and NiCoPO 3 , which together have their own advantages. Meanwhile, EP/GO-NiCoPO 3 nanocomposites can form a dense char layer during the burning process and improve the thermal stability of EP/GO-NiCoPO 3 nanocomposites.

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“…Generally, the content of flame retardants must be high enough to achieve a perfect flame‐retardant effect for a single flame‐retardant agent, which can drastically reduce the mechanical properties because of the poor compatibility of flame‐retardant and PP matrices as well as a substantially increasing material costs. Hence, composite flame retardants, which often contain nanoparticles, have been extensively studied and reported to be effective . However, the opposite polarities of PP resin and these flame‐retardant particles often lead to poor compatibility and uneven dispersion of flame retardants in the PP, resulting in easy aggregation of flame retardants and a decrease in the flame retardancy and mechanical properties of the material.…”

Section: Introductionmentioning

confidence: 99%

Improvement of the dispersity of micro‐nano particles for PP/PVC composites using gas‐assisted dispersion in a controlled foaming process

Zhou

Zhao

Dong

et al. 2019

Polymer Engineering & Sci

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Polyvinyl chloride (PVC) and nanosilicon dioxide (nano‐SiO2) were blended with neat polypropylene (PP) to improve its flame retardancy and cellular foam structure, and the dispersal effects of PVC and nano‐SiO2 and the foaming effect of the PP/PVC composites were investigated. PP/PVC samples with different compositions and foaming degrees were first fabricated by conventional injection molding with and without a blowing agent. Tensile testing, differential scanning calorimetry, scanning electron microscopy, limiting oxygen index testing, and vertical burn testing were used to study the mechanical properties, thermal features, microstructures, and flame‐retardant properties of the molded samples, and the samples with different degrees of foaming were compared. The results suggest that the foaming process facilitates the dispersion of PVC and nano‐SiO2, while the presence of PVC and nano‐SiO2 improves the foamability of PP. A method for a gas‐assisted dispersion technology to control the foaming process was hence proposed. Considering that the mechanical properties of PP/PVC could be retained with satisfactory flame retardancy and weight loss, convenient processing, and low‐cost materials; the technology presented can be directly applied for lightweight engineering and the manufacture of fire‐resistant material and can act as a reference for other micro‐nano processing involving the dispersion of particles. POLYM. ENG. SCI., 60:524–534, 2020. © 2019 Society of Plastics Engineers

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Improving flame retardancy of PP/MH/RP composites through synergistic effect of organic CoAl-layered double hydroxide

Cited by 20 publications

References 35 publications

High Performance Layered Inorganic Flame Retardants: a Review

High Performance Layered Inorganic Flame Retardants: a Review

Effect of Graphene Oxide–Modified Cobalt Nickel Phosphate on Flame Retardancy of Epoxy Resin

Improvement of the dispersity of micro‐nano particles for PP/PVC composites using gas‐assisted dispersion in a controlled foaming process

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