A facile way to prepare two novel <scp>DOPO</scp>‐containing liquid benzoxazines and their graphene oxide composites

Xu, Guangqing; Shi, Tiejun; Wang, Quan; Liu, Jianhua; Yang, Yi

doi:10.1002/app.41634

Cited by 16 publications

(12 citation statements)

References 34 publications

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“…The multiple peaks between 130 and 140 ppm correspond to the resonance absorption peaks of biphenyl on DKP polymer. The peak at 34.7 ppm is the resonance absorption of carbon atoms in P–CH 2 [ 33 ], and two peaks at 63.5 and 68.2 ppm correspond to two kinds of carbon atoms in –CH 2 –O–CH 2 – of KH560 [ 30 ]. The peaks at 22.7 and 73.2 ppm reflect the two types of carbon atoms in –CH 2 –CH 2 –O– of PEG600 part in the DKP polymer.…”

Section: Resultsmentioning

confidence: 99%

A Novel Silicon/Phosphorus Co-Flame Retardant Polymer Electrolyte for High-Safety All-Solid-State Lithium Ion Batteries

et al. 2020

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Developing a solid polymer electrolyte with superior flame retardancy and lithium-ion transportation properties is still a challenge. Herein, an intrinsic silicon/phosphorus co-flame retardant polymer solid electrolyte was prepared by using polyethylene glycol (PEG) co-polymerized with silicon and phosphorus-containing monomers. Due to the synergistic flame-retardant effect of silicon and phosphorus elements, this polymer electrolyte exhibits excellent thermal stability and flame resistance. Moreover, the ionic conductivity of the electrolyte at 25 °C is as high as 2.98 × 10−5 S/cm when the mass ratio of LiN(SO2CF3)2 (LiTFSI) and the prepared polymer electrolyte is 10:1. What is more, the LiFePO4/Li all-solid-state battery assembled with this solid electrolyte can work stably at a high temperature of 60 °C and exhibits a specific capacity of 129.2 mAh/g at 0.2 C after 100 cycles, providing a promising application prospect for high-safety lithium-ion batteries.

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Section: Resultsmentioning

confidence: 99%

A Novel Silicon/Phosphorus Co-Flame Retardant Polymer Electrolyte for High-Safety All-Solid-State Lithium Ion Batteries

et al. 2020

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“…The other characteristic protons of CPF were almost the same as the 1 H-NMR spectrum of cardanol. Except that one peak at 5.97 ppm, which disappeared and showed one aromatic proton in cardanol was reacted and be substituted 18 . All these data confirmed that CPF was successfully synthesized from cardanol 5 .…”

Section: H-nmr Spectrum Of Cardanolmentioning

confidence: 96%

“…Mechanics, flame retardances and thermal properties of the hybrid materials will be investigated. 18 . All other chemicals are used as received.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and properties of hybrid Mo-CPF/P₁B from cardanol

Shi

et al. 2015

RSC Adv.

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Mo-CPF/P1B hybrid has been prepared from molybdenum modified cardanol phenolic (Mo-CPF) and cardanol benzoxazine with phosphorus (P1B). Cardanol benzoxazine with phosphorus (P1B) has been synthesized from cardanol-allylamine-based benzoxazine (BZc-a) and DOPO (9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide). Cardanol phenolic modified with molybdenum (Mo-CPF) has been synthesized by reacting cardanol-based phenolic resins (CPF) with ammonium molybdate tetrahydrate at 150 ℃, where the CPF was synthesized from cardanol and paraformaldehyde in presence of sodium hydroxide at 65 ℃. The synthesized CPF and Mo-CPF were characterized by 1 H-NMR and size exclusion chromatography (SEC). Mixed Mo-CPF with P1B, cured the mixtures at 110 ℃ for 4 hrs and got Mo-CPF/P1B hybrid. The property of Mo-CPF/P1B hybrid was investigated; the results demonstrated that mechanical and thermal properties, together with flame retardance were greatly improved. Dynamic Mechanical Analysis (DMA) measurements results indicated that CPF, Mo-CPF and Mo-CPF/P1B could all sustain a large amount of stress and the elongations at break were different. DMA measurements suggested that Tg of CPF, Mo-CPF and Mo-CPF/P1B were 98 ℃, 170 ℃ and 131 ℃ respectively. Mo-CPF/P1B exhibited better flame retardance after conjugating with molybdenum and phosphorus. TGA results suggested Mo-CPF/P1B exhibited better thermal properties. Field emission electron microscope (FE-SEM) suggested that molybdenum were randomly distributed in Mo-CPF and Mo-CPF/P1B, and EDX indicated that molybdenum and phosphorus were randomly distributed in the Mo-CPF/P1B.a bis(benzoxazine-maleimide)s was synthesized with hydroxyphenylmaleimide, paraformaldehyde and various diamines. 4-cyanophenol 7 was used to synthesis benzoxazine monomer via Mannich reaction. These materials are all petroleum-based. Long-Our measurements indicated that cured CPF resin had a broad Tg transition area ranging from 98℃ to 200℃, which may due to the complicated structures formed after the condensation between functional groups such as CH 2 OH or -OH in CPF. However, curedMo-CPF/P 1 B resin showed a step change of tan δ curve after the temperature increased to 200℃. As glass transition is normally affected by the molecular mobility of materials cooperative units, in our system, the frequency of the cooperative rearrangement of co-

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“…2 –4 Another advantage of polybenzoxazine is molecular design flexibility that prompts the development of a wide range of benzoxazine monomers having various functional groups. 5 –10 Therefore, polybenzoxazine has developed rapidly in the fields of aerospace industry, printed circuit boards, and composite materials during the past 30 years. 11 –14 However, its high curing temperature which is usually above 200°C limits its application in some fields, such as plant fiber-reinforced composite materials.…”

Section: Introductionmentioning

confidence: 99%

Effect of acetylacetone metal salts on curing mechanism and thermal stability of polybenzoxazine

Yan

Wang

et al. 2020

High Performance Polymers

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To overcome high water absorption of inorganic metal salts and their poor compatibility with resin, acetylacetone metal salts (M(acac) n) were selected as the catalysts of benzoxazine resin. Their effects on the catalytic activity, structure, and thermal stability of polybenzoxazine had been estimated by dynamic differential scanning calorimetry, in situ Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and thermal gravimetric analyzer. The results revealed that M(acac) n of iron (Fe3+), cobalt (Co3+ and Co2+), and copper (Cu2+) exhibited high catalytic activity and reduced evidently activation energy, especially acetylacetone iron salt. The addition of M(acac) n was beneficial to the formation of Ph–N–Ph structure, which was easy to form a denser carbon layer during thermal degradation, prevented heat transfer and further decomposition of the resin, and finally led to the increase of carbon residue at high temperature.

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A facile way to prepare two novel DOPO‐containing liquid benzoxazines and their graphene oxide composites

Cited by 16 publications

References 34 publications

A Novel Silicon/Phosphorus Co-Flame Retardant Polymer Electrolyte for High-Safety All-Solid-State Lithium Ion Batteries

A Novel Silicon/Phosphorus Co-Flame Retardant Polymer Electrolyte for High-Safety All-Solid-State Lithium Ion Batteries

Fabrication and properties of hybrid Mo-CPF/P₁B from cardanol

Effect of acetylacetone metal salts on curing mechanism and thermal stability of polybenzoxazine

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A facile way to prepare two novel DOPO‐containing liquid benzoxazines and their graphene oxide composites

Cited by 16 publications

References 34 publications

A Novel Silicon/Phosphorus Co-Flame Retardant Polymer Electrolyte for High-Safety All-Solid-State Lithium Ion Batteries

A Novel Silicon/Phosphorus Co-Flame Retardant Polymer Electrolyte for High-Safety All-Solid-State Lithium Ion Batteries

Fabrication and properties of hybrid Mo-CPF/P1B from cardanol

Effect of acetylacetone metal salts on curing mechanism and thermal stability of polybenzoxazine

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Product

Resources

About

Fabrication and properties of hybrid Mo-CPF/P₁B from cardanol