A new copper(II) chelate complex with polyamines as fire retardant and epoxy hardener: Synthesis, crystal and electronic structure, and thermal behavior of (ethylenediamine-N,N′)-(diethylenetriamine-N,N′,N″)-copper(II) hexafluoridosilicate

Lavrenyuk, Helen; Mykhalichko, B. M.; Dziuk, Błażej; Olijnyk, Volodymyr; Mykhalichko, Oleg

doi:10.1016/j.arabjc.2018.08.014

Cited by 8 publications

(9 citation statements)

References 17 publications

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“…As a result of it, the flame retardant‐hardener in the form of the pepa ‐CuSiF 6 chelate complex is formed (Figure 2A). Such complex was characterized using FTIR spectra 20 . The Cu(II)‐ (pepa ) chelating is clear detected by the shift of the vibration frequencies of NH bonds.…”

Section: Resultsmentioning

confidence: 99%

“…The [Cu( eda )( deta )]SiF 6 chelate complex (IR (KBr tablet, cm −1 ): 3416, 3238, and 3142 ( v NH ); 1584 ( δ NH ) 20 ) with the properties of a flame retardant‐hardener labeled as pepa ‐CuSiF 6 was obtained according to the procedure described in 20,21 . First, anhydrous salt (CuSiF 6 ) was obtained by dehydration of CuSiF 6 ·6H 2 O at 110°C in a drying oven until a white powder with a slightly noticeable bluish tint formed.…”

Section: Methodsmentioning

confidence: 99%

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New copper(II)‐coordinated epoxy‐amine polymers with flame‐self‐extinguishment properties: Elaboration, combustibility testing, and flame propagation rate measuring

et al. 2020

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Summary In the DGEBA ‐ pepa ‐ CuSiF6 system (DGEBA is diglycidyl ether of bisphenol A; pepa is polyethylenepolyamine containing ethylenediamine (eda) and diethylenetriamine (deta)), a new flame retardant‐hardener for epoxy resins in the form of a chelate complex [Cu(eda)(deta)]SiF6 was synthesized and incorporated into the DGEBA to obtain a number of CuSiF6‐containing epoxy‐amine polymers with reduced combustibility and flame‐self‐extinguishment properties. The resulting samples of the DGEBA/pepa‐CuSiF6(I‐V) were characterized using FTIR spectra, combustibility, and flammability tests and the smoke formation factor measurements. The combustibility of the polymer samples were investigated using “Ceramic tube” (CT) method. Results of CT measurement reveal that maximal temperature of gaseous products of combustion for modified epoxy‐amine polymers in comparison with the unmodified epoxy appreciably goes down and weight loss lessen. The flammability of the samples was evaluated by means of UL94 BH and UL94 BV methods. The burning rate of the DGEBA/pepa‐CuSiF6(III) and DGEBA/pepa‐CuSiF6(IV) polymers containing 44 and 66 weight fractions of CuSiF6, respectively, is dramatically reduced compared to that for unmodified epoxy (these samples do not support flame propagation). The rburn. Values for the unmodified epoxy‐amine sample (DGEBA/pepa) is 25.13 mm·min−1.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

New copper(II)‐coordinated epoxy‐amine polymers with flame‐self‐extinguishment properties: Elaboration, combustibility testing, and flame propagation rate measuring

et al. 2020

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“…hexafluorosilicate, [Cu(en)(dien)]SiF6 [6] containing en as a curing agent for epoxy resins and CuSiF6 as a flame retardant exhibits the properties of a flame retardanthardener similar to complex 1. Thermal analysis data performed for the [Cu(en)(dien)]SiF6 complex and its components (pepa and CuSiF6) showed that, in contrast to pepa, for which the total weight loss is observed in the temperature range from 20 ℃ to 170 ℃, the [Cu(en)(dien)]SiF6 complex completely decomposes at a temperature of many times higher than 544 ℃.…”

Section: Flame Retardant-hardener Properties Of [Cu(en)2(h2o)cl]clmentioning

confidence: 99%

“…Recently, chelate complexes [1] of many d-metals with polyamines [2] due to their thermal stabilization [3][4][5][6][7][8] caused by the chelating effect are widely used as flame retardants and hardeners of epoxy resins [9][10][11][12][13][14][15]. Among the great number of polydentate ligands, ethylenediamine (en) is known to use as an efficient curing agent to produce epoxy-polymer composites.…”

Section: Introductionmentioning

confidence: 99%

A flame retardant-hardener for epoxy resins: Synthesis, structural, and DFT studies of the [Cu(H2NC2H4NH2)2(H2O)Cl]Cl complex

2021

Turk J Chem

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The aqua-bis(ethylenediamine)-chloro-copper(II) chloride complex, [Cu(en)2(H2O)(Cl)]Cl (1), was synthesized by direct interaction of CuCl2⋅2H2O with pepa (pepa is a polyethylenepolyamine containing ethylenediamine (en)). The crystalline complex 1 was characterized by IR spectra and structurally studied. Crystals of this complex consist of the [Cu(en)2(H2O)(Cl)] + discrete cations, whose Cu 2+ ion is chelated by two en molecules. The Cu(II) coordination polyhedron has the shape of an elongated square bipyramid, in which four nitrogen atoms of the -NH2 groups of en molecules form the base of this bipyramid, and the oxygen atom of the water molecule and Clare in its apical positions. Three-dimensional framework 1 is formed due to hydrogen bonds O-H…Cl and N-H…Cl. The Cu(II)-(H2NC2H4NH2) chelation was studied by DFT using the 6-31G* basis set. The calculated electron-stereochemical 2 parameters are in good agreement with the ability of complex 1 to simultaneously be a flame retardant and a curing agent of epoxy resins.

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“…Lin Mo has used CuO as synergistic flame retardant in intumescent flame retardant TPU based on triazine‐based carbon foaming agent (CFA and APP), and found CuO exhibited excellent smoke suppression properties, could greatly reduce the peak smoke production rate (pSPR) and Total suspended particles (TSP) parameter, delay and reduce the pCOP parameter 15 . Lavrenyuk et al reported chelate‐[Cu(eda)]SiF 6 could be used as both flame retardants and curing agents for epoxy 16,17 . Based on the above research, a new idea appeared that a new flame retardant integrated with copper chelate and APP might act synergistically to enhance the fire safety performances of TPU.…”

Section: Introductionmentioning

confidence: 99%

Superior fire safety performances of chelates copper(II) salicylaldehyde complexes with intumescent flame retardant TPU

Chen

Zhang

Kuang

et al. 2020

Polymers for Advanced Techs

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To improve the flame retardant of thermoplastic polyurethane elastomer (TPU) is a very important issue in fire hazard fields. In this article, the structure of copper (II) chelate salicylaldehyde (CuSA) was characterized by X‐ray diffraction (XRD), Fourier transform infrared (FTIR), and scanning electron microscopy (SEM). The influence of CuSA on the fire safety performances of TPU/APP composites was intensively investigated using cone calorimeter test (CCT), smoke density test (SDT), micro‐scale combustion calorimetry (MCC), thermogravimetric‐Fourier transform infrared spectrum (TG‐FTIR), and other testing methods. The CCT test results showed that the peak heat release rate (pHRR) value of CuSA2 sample was 128.1 kW/m2, which was much lower than that of TPU‐APP sample with the pHRR value of 161.9 kW/m2. The SDT test results showed that the luminous flux of CuSA4 is much higher than that of TPU‐APP sample. Therefore, an appropriate amount of CuSA had obvious improvement of fire safety performances in TPU composites. This work provides a new idea for the design and manufacture of fire safety materials.

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A new copper(II) chelate complex with polyamines as fire retardant and epoxy hardener: Synthesis, crystal and electronic structure, and thermal behavior of (ethylenediamine-N,N′)-(diethylenetriamine-N,N′,N″)-copper(II) hexafluoridosilicate

Cited by 8 publications

References 17 publications

New copper(II)‐coordinated epoxy‐amine polymers with flame‐self‐extinguishment properties: Elaboration, combustibility testing, and flame propagation rate measuring

New copper(II)‐coordinated epoxy‐amine polymers with flame‐self‐extinguishment properties: Elaboration, combustibility testing, and flame propagation rate measuring

A flame retardant-hardener for epoxy resins: Synthesis, structural, and DFT studies of the [Cu(H2NC2H4NH2)2(H2O)Cl]Cl complex

Superior fire safety performances of chelates copper(II) salicylaldehyde complexes with intumescent flame retardant TPU

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