Synthesis and characterization of a novel Schiff base and its enhancement on flame retardancy of epoxy resins

You, Guoxiang; He, Hongwu; Feng, Bin; Yuying, Tang; Fan, Fangfang; Cheng, Zhiquan; Changjie, Yang; Liang, Cong

doi:10.1007/s11696-020-01067-8

Cited by 3 publications

(6 citation statements)

References 33 publications

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“…Previous studies revealed that C═N bonds in Schiff base compounds are able to generate nitrogen-containing hexatomic ring at higher temperature, and these hexatomic ring structures will form stable crosslinked networks, thus leading to high flame retardancy. [14][15][16] In addition, Schiff base compounds are easily to be synthesized. In fact, using biomass compound vanillin as the raw material, dihydroxyl compounds with Schiff base structure 17 and epoxy resin monomer 18 were synthesized.…”

Section: Introductionmentioning

confidence: 99%

“…Unfortunately, Schiff base compounds are only used to improve the flame retardance of polyurethane, 16,19,20 polyester 14 and epoxy resins. 15,21,22 No work on preparing heat-resistant flame retarding bismaleimide resins based on Schiff base has been reported.…”

Section: Introductionmentioning

confidence: 99%

“…Previous studies revealed that C═N bonds in Schiff base compounds are able to generate nitrogen‐containing hexatomic ring at higher temperature, and these hexatomic ring structures will form stable crosslinked networks, thus leading to high flame retardancy 14–16 . In addition, Schiff base compounds are easily to be synthesized.…”

Section: Introductionmentioning

confidence: 99%

“…In fact, using biomass compound vanillin as the raw material, dihydroxyl compounds with Schiff base structure 17 and epoxy resin monomer 18 were synthesized. Unfortunately, Schiff base compounds are only used to improve the flame retardance of polyurethane, 16,19,20 polyester 14 and epoxy resins 15,21,22 . No work on preparing heat‐resistant flame retarding bismaleimide resins based on Schiff base has been reported.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Developing non‐halogen and non‐phosphorous flame retardant bismaleimide resin with high thermal resistance and high toughness through building crosslinked network with Schiff base structure

Yuan

Liang

et al. 2022

Polymers for Advanced Techs

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High flame retardancy has become a necessary property for heat‐resistant thermosetting resins (HRTRs) in many cutting‐edge fields. However, developing HRTRs with excellent flame retardancy through sustainable strategy (halogen‐free and phosphorus‐free) is still a great challenge. Herein, a novel halogen‐free and phosphorus‐free allyl compound with Schiff base structure (PDM) was efficiently synthesized from biobased protocatechualdehyde, and then four new flame retarding bismaleimide resins (BP1, BP2, BP3, BP4) were developed by building crosslinked network with PDM. The molar ratio of allyl to imide has a significant effect on performances of BP resins, BP2 resin (its molar ratio of allyl to imide is 0.86) shows the best integrated performances, it has not only high impact strength (14.37 ± 1.1 kJ/m2), but also the highest glass transition temperature (343.5°C) and limiting oxygen index (36.4%) among halogen‐free and phosphorus‐free flame retarding bismaleimide resins reported so far. The investigation on flame retardant mechanism of BP resins shows that the mechanism includes condensed‐phase and gas‐phase flame retarding effects.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Developing non‐halogen and non‐phosphorous flame retardant bismaleimide resin with high thermal resistance and high toughness through building crosslinked network with Schiff base structure

Yuan

Liang

et al. 2022

Polymers for Advanced Techs

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“…The FRs could be split into five groups returning to their chemical composition: (1) metallic oxides and sulphides; (2) nitrogen compounds; (3) halogen compounds; (4) inorganic hydrates, hydroxyl compounds, boric compounds, silicates and carbonates; and (5) phosphorous compounds. [ 3,4 ] Flame retardants could be included in polymeric materials as additives or as reactive materials. Widely used FR additive could be included in polymers in a physical way.…”

Section: Introductionmentioning

confidence: 99%

Novel flame retardant paint based on Co(II) and Ni(II) metal complexes as new additives for surface coating applications

Younis

Faheim

Elsawy

et al. 2020

Applied Organom Chemis

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The study is focused on the synthesis of a new Co(II) and Ni(II) metal complexes, which is synthesized by the reaction of the isatin 4-aminoantipyrine Schiff base ligand with selected divalent Co(II) and Ni(II) ions and their possible applications as flame retardant additives in paint formulations for surface coating application. The prepared metal complexes were characterized using a combination of Fourier transform infrared, elemental analysis, proton nuclear magnetic resonance, 13 C-NMR spectra, and mass spectroscopy. The prepared Schiff base ligand metal complexes were physically added to alkyd paint formulation to give coating formulations at a laboratory scale and then applied onto plywood and steel panels using a brush. The ignitability and oxygen index values obtained indicated that the paint which

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Bismaleimide resins modified by a novel vanillin‐derived allyl compounds: Synthesis, curing behavior, and thermal properties

Yuan

Wang

Liu

et al. 2023

Polymer Engineering & Sci

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In this study, a novel biobased allyl compound with Schiff‐based structure (MPAM) was developed to improve the toughness and thermal properties of 4,4′‐bismaleimidodiphenylmethane (BDM). The chemical structure of MPAM was characterized by Fourier transform infrared spectroscopy (FTIR) and nuclear magnetic resonance (1H NMR). A series of BDM/DBA‐MPAM blend resins (BD‐MPAM resins) were prepared by adjusting the mass ratio of BDM + DBA (BD) to MPAM. The effects of MPAM content on the curing behavior, thermal and mechanical properties of BD‐MPAM resins were discussed in details. Compared with BD resin, the thermal stability of modified resins was improved by increasing the content of MPAM. Meanwhile, an increase of 37.1% in flexural strength, and 228 MPa in flexural modulus were obtained for the cured BD‐MPAM resin having 10 wt% MPAM loading compared to the BD resin. The impact strength of BD‐10 wt% MPAM is of the maximum value (6.6 kJ/m2). Finally, the fracture surface morphology of the BD‐MPAM resins was studied by the scanning electron microscope (SEM).

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Synthesis and characterization of a novel Schiff base and its enhancement on flame retardancy of epoxy resins

Cited by 3 publications

References 33 publications

Developing non‐halogen and non‐phosphorous flame retardant bismaleimide resin with high thermal resistance and high toughness through building crosslinked network with Schiff base structure

Developing non‐halogen and non‐phosphorous flame retardant bismaleimide resin with high thermal resistance and high toughness through building crosslinked network with Schiff base structure

Novel flame retardant paint based on Co(II) and Ni(II) metal complexes as new additives for surface coating applications

Bismaleimide resins modified by a novel vanillin‐derived allyl compounds: Synthesis, curing behavior, and thermal properties

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