Self-assembly strategy to obtain phytic acid doped OBN hybrids for enhancing fire safety of epoxy resin with lower dielectric loss

Feng, Tingting; Cui, Jiahui; Wang, Yaxuan; Piao, Junxiu; Wang, Yaofei; Ren, Jinyong; Guan, Haocun; Lian, Richeng; Ou, Mingyu; Liu, Lei; Chen, Xilei; Jiao, Chuanmei

doi:10.1016/j.coco.2022.101319

Cited by 9 publications

(2 citation statements)

References 25 publications

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“…But polymers with a high cross-linking degree present brittleness, insolubility, and non-processability, which result in the limit of its application and environmental pollution . [25][26][27][28][29] Poly(aryl ether) is a high-performance polymer synthesized by nucleophilic substitution of bisphenol and di-halogen monomers.…”

Section: Introductionmentioning

confidence: 99%

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Reducing the dielectric loss of poly(aryl ether)s by grafting

Shi

Zhou

Zong

et al. 2023

Polymers for Advanced Techs

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Limiting molecules' polarized motion effectively reduces the dielectric loss of materials. This article synthesized side chains with different lengths using p‐ethoxyphenol, p‐hydroxybenzoic acid, and long‐chain halohydrins through a two‐step process. These chains' movement was almost unaffected by the main chain of polymers, so they can fill up the free volume of polymers under certain conditions. 1,2‐dihydro‐4‐(4‐hydroxyphenyl)phthalazine‐1‐(2H)‐one(DHPZ), 4,4'‐Difluorophenyl sulfone(DFS), and 4,4‐Bis(4‐hydroxyphenyl) valeric acid(HPV) obtained three polymers with different carboxyl groups (10%, 30%, and 50%) through nucleophilic substitution. They were then grafted and treated with hot‐pressing. The introduction of side chains could reduce the free volume of polymers under hot‐pressing conditions, so further reducing the dielectric loss of materials. Polymer with the shortest and least (10%) side chains showed the most obvious dielectric loss tangent, the reduction rate of the film's dielectric loss tangent was 13.11% (at Tg + 15°C, while the non‐grafted one was only 3.69%) and 20.70% (at Tg + 80°C, while the non‐grafted one was only 8.35%), respectively. In addition, WXRD and DMA tests showed that films' intermolecular chain spacing (“d”) and Tg changed after the hot‐pressing process, respectively. The change law of both was consistent with that of dielectric loss tangent. Confirm that grafting high‐motility side chains can significantly reduce polymer's dielectric loss by enhancing the free volume reduction effect after hot‐pressing.

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Section: Introductionmentioning

confidence: 99%

“…But polymers with a high cross‐linking degree present brittleness, insolubility, and non‐processability, which result in the limit of its application and environmental pollution . 25–29 …”

Section: Introductionmentioning

confidence: 99%

Reducing the dielectric loss of poly(aryl ether)s by grafting

Shi

Zhou

Zong

et al. 2023

Polymers for Advanced Techs

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Carbon nitride/polyaniline/metal oxide composite system endows epoxy resin with reinforcements in the fire safety, thermal stability, and water resistance

Cui,

Ou,

Guan

et al. 2024

J of Applied Polymer Sci

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Reducing the fire risk of epoxy coatings has been a significant focus in the research of thermosetting resin materials. Various carbon nitride/polyaniline/metal oxide hybrids (CNPMOs) were synthesized using in‐situ oxidative polymerization and modified adsorption methods. Combustion analysis results indicated that CNPMOs effectively reduced the heat release of epoxy coatings during combustion. The epoxy coatings containing various CNPMOs (EFe, EY, and ETi) exhibited excellent smoke suppression and toxicity reduction properties. Furthermore, in comparison to the pure sample (E0) and reference sample (E1), the epoxy coatings EFe, EY, and ETi demonstrated improved thermal stability. In water resistance tests, the water absorption rates of EFe, EY, and ETi were significantly lower than that of E0. The CNPMOs enhanced the hydrophobicity of the epoxy coating to better protect the substrate in humid environments.

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Highly flame retardant, strength, and tough epoxy resins and CFRPs via introducing a self-assembly novel ionic bond, rigid-flexible structure PPI

Liu,

Chai,

et al. 2024

Chemical Engineering Journal

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Self-assembly strategy to obtain phytic acid doped OBN hybrids for enhancing fire safety of epoxy resin with lower dielectric loss

Cited by 9 publications

References 25 publications

Reducing the dielectric loss of poly(aryl ether)s by grafting

Reducing the dielectric loss of poly(aryl ether)s by grafting

Carbon nitride/polyaniline/metal oxide composite system endows epoxy resin with reinforcements in the fire safety, thermal stability, and water resistance

Highly flame retardant, strength, and tough epoxy resins and CFRPs via introducing a self-assembly novel ionic bond, rigid-flexible structure PPI

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