Functionalization of α-zirconium phosphate by polyphosphazene and its effect on the flame retardance of an intumescent flame retardant polypropylene system

Xu, Lingfeng; Lei, Caihong; Xu, Ruijie; Zhang, Xiaoqing; Zhang, Feng

doi:10.1039/c6ra15382h

Cited by 30 publications

(14 citation statements)

References 37 publications

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“…The higher the degree of graphitization, the lower the I D /I G ratio and the denser the char layer. 38 In Figure 12, shows that the surface of the char residual of TPU-0 is severely damaged and porous with little residual. Compared with neat TPU, the composites' char residue material was expanded and the number of pores on the surface was reduced, which was attributed mainly to the expanded flame retardation of IFR.…”

Section: Thermal Conductivity Of Tpu Compositesmentioning

confidence: 99%

Improvement of thermoplastic polyurethane's flame retardancy and thermal conductivity by leaf‐shaped cobalt‐zeolitic imidazolate framework–modified graphene and intumescent flame retardant

Cheng

Qin

et al. 2020

Polymers for Advanced Techs

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In this work, a new type of leaf‐shaped cobalt‐zeolitic imidazolate framework–modified graphene (Co‐ZIF‐L@RGO) hybrid was successfully prepared and blended with an intumescent flame retardant (IFR). It was added into thermoplastic polyurethane (TPU) to study the effect of its combination with IFR on the thermal conductivity and flame retardant performance of TPU. The morphology and structure of the Co‐ZIF‐L@RGO hybrid were characterized by scanning electron microscope (SEM), Fourier transform infrared and X‐ray diffraction (XRD). The results showed that Co‐ZIF‐L were uniformly loaded on the surface of graphene. Furthermore, compared with pure TPU, the limiting oxygen index values of the composite material with 3 wt% Co‐ZIF‐L and 27 wt% IFR increased to 32.6%. Their UL‐94 rating reached V‐0 rating. Their peak heat release rate, total heat release, peak smoke production rate and total smoke production were also greatly reduced by 84.4%, 70.1%, 60.3% and 62.5%, respectively. The thermogravimetric‐infrared test results showed that the amount of toxic gas emissions was effectively suppressed. The residual carbon was analyzed by SEM, laser Raman spectroscopy and XRD, and flame retardant mechanism was further investigated. Besides, the addition of this hybrid improved the thermal conductivity of TPU.

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Section: Thermal Conductivity Of Tpu Compositesmentioning

confidence: 99%

Improvement of thermoplastic polyurethane's flame retardancy and thermal conductivity by leaf‐shaped cobalt‐zeolitic imidazolate framework–modified graphene and intumescent flame retardant

Cheng

Qin

et al. 2020

Polymers for Advanced Techs

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“…Second, a small amount of phosphorus monoxide (PO•) produced by the combustion of OZrP can quench active radicals produced by the burning of the gas phase, while the exfoliated OZrP layers can efficiently promote the formation of compact F 2: Flame retardant mechanisms of partial two-dimensional materials. (a) e free radicals of PP chain scission are inhibited, and then a coherent, thermally stable, and tough swollen char is formed under the catalysis of solid acid sites on the surface of a-zrp core [59]. (b) LDHs catalyze the formation of a thick char layer on the surface of EP [60].…”

Section: Gas Phase Free Radical Inhibitionmentioning

confidence: 99%

“…erefore, solid acid-type α-ZrP can play an effective role as a crosslinking catalyst through the catalysis of carbonization of the polymer itself during thermal decomposition [93]. However, two main subjects have to be addressed before their further applications as flame retardants: the inherent agglomeration of nano-sized α-ZrP and their incompatibility with polymers [59,63,67,.…”

Section: Nitrogen-containing Compoundsmentioning

confidence: 99%

Nanoreinforcements of Two-Dimensional Nanomaterials for Flame Retardant Polymeric Composites: An Overview

Hong

Chen

2019

Advances in Polymer Technology

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Polymer materials are ubiquitous in daily life. While polymers are often convenient and helpful, their properties often obscure the fire hazards they may pose. Therefore, it is of great significance in terms of safety to study the flame retardant properties of polymers while still maintaining their optimal performance. Current literature shows that although traditional flame retardants can satisfy the requirements of polymer flame retardancy, due to increases in product requirements in industry, including requirements for durability, mechanical properties, and environmental friendliness, it is imperative to develop a new generation of flame retardants. In recent years, the preparation of modified two-dimensional nanomaterials as flame retardants has attracted wide attention in the field. Due to their unique layered structures, two-dimensional nanomaterials can generally improve the mechanical properties of polymers via uniform dispersion, and they can form effective physical barriers in a matrix to improve the thermal stability of polymers. For polymer applications in specialized fields, different two-dimensional nanomaterials have potential conductivity, high thermal conductivity, catalytic activity, and antiultraviolet abilities, which can meet the flame retardant requirements of polymers and allow their use in specific applications. In this review, the current research status of two-dimensional nanomaterials as flame retardants is discussed, as well as a mechanism of how they can be applied for reducing the flammability of polymers.

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“…The EDS analysis suggested that the AM-ZrP in the PPA/AM-ZrP composite acted as catalyst for the char layer production, and promoted the formation of compact char layer, resulting in the good ame retardancy of the composite. 33,34…”

Section: Effects Of Am-zrp On the Ame Retardancymentioning

confidence: 99%

Preparation of a flame retardant phosphorus-containing polyacrylate/α-zirconium phosphate nanocomposite through in situ emulsion polymerization

Lei

et al. 2017

RSC Adv.

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Functionalization of α-zirconium phosphate by polyphosphazene and its effect on the flame retardance of an intumescent flame retardant polypropylene system

Abstract: α-ZrP was combined with polyphosphazene and formed a core–shell structure, which has a significant synergistic flame retardant performance in polypropylene.

Cited by 30 publications

References 37 publications

Improvement of thermoplastic polyurethane's flame retardancy and thermal conductivity by leaf‐shaped cobalt‐zeolitic imidazolate framework–modified graphene and intumescent flame retardant

Improvement of thermoplastic polyurethane's flame retardancy and thermal conductivity by leaf‐shaped cobalt‐zeolitic imidazolate framework–modified graphene and intumescent flame retardant

Nanoreinforcements of Two-Dimensional Nanomaterials for Flame Retardant Polymeric Composites: An Overview

Preparation of a flame retardant phosphorus-containing polyacrylate/α-zirconium phosphate nanocomposite through in situ emulsion polymerization

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