Synergistic effect of expandable graphite and aluminum hypophosphite in flame‐retardant ethylene vinyl acetate composites

Yang, Jingzhou; Chen, Xiaohong; Zhou, Honglei; Guo, Weichun; Zhang, Jian; Miao, Zhen; He, Deyan

doi:10.1002/pat.5546

Cited by 7 publications

(2 citation statements)

References 30 publications

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“…When Yang et al [ 234 ] used AHP as the adjuvant for EG/EVA composites, the EVA/10 wt.% EG/5 wt.% AHP achieved a V-0 grade in UL-94 test, and the LOI value reached 30.5% from 26.5% after the addition of 5 wt.% AHP. Meanwhile, the elongation at break and tensile strength of EVA composites reached 732% and 12.2 MPa, respectively.…”

Section: Intumescent Flame Retardantsmentioning

confidence: 99%

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Recent Advances in Halogen-Free Flame Retardants for Polyolefin Cable Sheath Materials

Liu

et al. 2022

Polymers

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With the continuous advancements of urbanization, the demand for power cables is increasing to replace overhead lines for energy transmission and distribution. Due to undesirable scenarios, e.g., the short circuit or poor contact, the cables can cause fire. The cable sheath has a significant effect on fire expansion. Thus, it is of great significance to carry out research on flame-retardant modification for cable sheath material to prevent fire accidents. With the continuous environmental concern, polyolefin (PO) is expected to gradually replace polyvinyl chloride (PVC) for cable sheath material. Moreover, the halogen-free flame retardants (FRs), which are the focus of this paper, will replace the ones with halogen gradually. The halogen-free FRs used in PO cable sheath material can be divided into inorganic flame retardant, organic flame retardant, and intumescent flame retardant (IFR). However, most FRs will cause severe damage to the mechanical properties of the PO cable sheath material, mainly reflected in the elongation at break and tensile strength. Therefore, the cooperative modification of PO materials for flame retardancy and mechanical properties has become a research hotspot. For this review, about 240 works from the literature related to FRs used in PO materials were investigated. It is shown that the simultaneous improvement for flame retardancy and mechanical properties mainly focuses on surface treatment technology, nanotechnology, and the cooperative effect of multiple FRs. The principle is mainly to improve the compatibility of FRs with PO polymers and/or increase the efficiency of FRs.

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Section: Intumescent Flame Retardantsmentioning

confidence: 99%

“…( b ) Schematic diagram of flame-retardant mode of action for EVA/EG/AHP. Reprinted from Reference [ 234 ] with permission.…”

Section: Figurementioning

confidence: 99%

Recent Advances in Halogen-Free Flame Retardants for Polyolefin Cable Sheath Materials

Liu

et al. 2022

Polymers

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A novel strategy for preparing ethylene‐vinyl acetate composites with high effective flame retardant and smoke suppression performance by incorporating piperazine pyrophosphate and Ce‐MOF

Jiang

Yang

et al. 2023

Journal of Polymer Science

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Cerium‐containing metal organic framework defined as Ce‐MOF was prepared and then combined with piperazine pyrophosphate (PAPP) for preparing flame retardant ethylene vinyl acetate (EVA) copolymer composites. The samples of EVA/PAPP/Ce‐MOF achieved UL‐94 V‐0 rating with the limiting oxygen index (LOI) value of 31.3% when 17 wt% PAPP/Ce‐MOF with the mass fraction of 97:3 was introduced. Under the same loading amount of PAPP, the EVA/PAPP only obtained UL‐94 V‐1 rating with the LOI value of 26.9%. Cone calorimeter test confirmed that the total heat release and total smoke production of EVA/PAPP/Ce‐MOF significantly reduced from 132.8 MJ m−2 and 11.5 m2 for EVA/PAPP to 98.8 MJ m−2 and 7.3 m2, with a reduction of 25.6% and 36.5%, respectively. Besides, the maximum smoke density decreased from 488.8 and 375.9 for EVA and EVA/PAPP to 177.5 for EVA/PAPP/Ce‐MOF. It indicated that the addition of Ce‐MOF and PAPP effectively exerted synergistic flame retardant and smoke inhibition effect for EVA. Moreover, the addition of Ce‐MOF enhanced the compatibility of PAPP with EVA matrix, and water resistance of EVA/PAPP/Ce‐MOF was higher than that of EVA/PAPP. The x‐ray photoelectron spectroscopy texts of residual char of EVA composites indicated that the cerium ion complexed with phosphoric acid and polyphosphate generated by the thermal decomposition of PAPP and then more phosphorus elements remained in condensed phase. As a result, the sufficient, crosslinking and dense char layer with excellent intensity was formed, and the heat, combustible gas and smoke were efficiently inhibited. Consequently, the EVA materials were endowed excellent fire safety as well as low heat and smoke release.

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Effects of iron-based metal–organic framework-MIL-53(Fe) and phosphorus-based flame retardants on the flame retardancy of high-density polyethylene

Liu,

Deng,

Zhao

et al. 2024

J Therm Anal Calorim

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Synergistic effect of expandable graphite and aluminum hypophosphite in flame‐retardant ethylene vinyl acetate composites

Cited by 7 publications

References 30 publications

Recent Advances in Halogen-Free Flame Retardants for Polyolefin Cable Sheath Materials

Recent Advances in Halogen-Free Flame Retardants for Polyolefin Cable Sheath Materials

A novel strategy for preparing ethylene‐vinyl acetate composites with high effective flame retardant and smoke suppression performance by incorporating piperazine pyrophosphate and Ce‐MOF

Effects of iron-based metal–organic framework-MIL-53(Fe) and phosphorus-based flame retardants on the flame retardancy of high-density polyethylene

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