A novel organic‐inorganic flame retardant of ammonium polyphosphate chemically coated by Schiff base‐containing branched polysiloxane for polyamide 6

Fan, Shuo; Sun, Yanlu; Wang, Xueli; Yu, Jianyong; Wu, Dequn; Li, Faxue

doi:10.1002/pat.5003

Cited by 25 publications

(5 citation statements)

References 31 publications

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“…The binding interactions of metal complexes with DNA have been studied (Shahabadi et al, 2010). Schiff bases have different applica-tions in many research areas including organic, inorganic, biological and materials chemistry (Fan et al, 2020) and as dyes for the textile and related industries. These compounds also have unique characteristics that make them promising candidates for photovoltaic and photonic materials applications (Abdel-Shakour et al, 2019;Imer et al,2018).…”

Section: Chemical Contextmentioning

confidence: 99%

Crystal structure and Hirshfeld surface analysis of dimethyl 3,3′-{[(1E,2E)-ethane-1,2-diylidene]bis(azanylylidene)}bis(4-methylbenzoate)

Yeşilbağ

Çınar

Dege

et al. 2022

Acta Crystallogr E Cryst Commun

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The title Schiff base compound, C20H20N2O4, synthesized by the condensation reaction of methyl 3-amino-4-methylbenzoat and glyoxal in ethanol, crystallizes in the the monoclinic space group P21/n. The molecule is Z-shaped with the C—N—C—C torsion angle being 47.58 (18)°. In the crystal, pairs of molecules are linked via C—H...N hydrogen bonds, forming centrosymetric dimers with an R 2 2(8) ring motif; this connectivity leads to the formation of columns running along the a-axis direction. Hirshfeld surface analysis and two-dimensional fingerprint plots were used to explore the intermolecular interactions and revealed that the most significant contributions to the crystal packing are from H...H (49.4%), H...O/O...H (19.0%) and H...C/C...H (17.5%) contacts. Energy frameworks were constructed through different intermolecular interaction energies to investigate the stability of the compound. The net interaction energies for the title compound were found to be electrostatic (E ele = −48.4 kJ mol−1), polarization (E pol = −9.7 kJ mol−1), dispersion (E dis = −186.9 kJ mol−1) and repulsion (E rep = 94.9 kJ mol−1) with a total interaction energy, E tot, of −162.4 kJ mol−1.

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Section: Chemical Contextmentioning

confidence: 99%

Crystal structure and Hirshfeld surface analysis of dimethyl 3,3′-{[(1E,2E)-ethane-1,2-diylidene]bis(azanylylidene)}bis(4-methylbenzoate)

Yeşilbağ

Çınar

Dege

et al. 2022

Acta Crystallogr E Cryst Commun

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“…Wu et al prepared (SP‐APP) by coating ammonium polyphosphate (APP) with Schiff base‐containing branched polysiloxane via ion exchange reaction and dehydration‐condensation. SP‐APP endowed polyamide 6 (PA6) with excellent flame retardancy and anti‐dripping 30 …”

Section: Introductionmentioning

confidence: 99%

Structure regulation of boron‐doped calcium hydroxystannate and its enhancement on flame retardancy and mechanical properties of PVC

Dong

Qiao

et al. 2021

Polymers for Advanced Techs

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In this study, a perovskite type calcium hydroxystannate (CaSn[OH]6, CSH) was prepared by a facial coprecipitation method. Then boron was further doped into CaSn(OH)6 to obtain B@CSH as a new inorganic flame retardant to polyvinyl chloride (PVC). The characterization of chemical composition, morphology, and bonding structure for CSH and B@CSH reveals that the doping of boron can effectively regulate the morphology and particle size of CSH. When applying into PVC, flame retardancy, smoke suppression, and mechanical performance are significantly enhanced by the addition of CSH and B@CSH. Under 5% addition of CSH and B@CSH, the limited oxygen index (LOI) value of PVC composites was increased from 26.6% to 32.9% and 34.0%, respectively. The cone calorimetry tests show that the peak heat release rate (PHRR), total heat release (THR), and total smoke production (TSP) of PVC composites are all greatly reduced. The PHRR and TSP are reduced by 49.2% and 42.3% with the 5% loading of B@CSH, respectively. Furthermore, the mechanical strength and toughness of PVC are both improved by CSH and B@CSH. The synthesized CSH and B@CSH act as a multi‐functional additive for PVC with high efficiency.

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“…[9,16] There is a long history of utilizing conventional FR additives such as ammonium polyphosphate (APP) to reduce the flammability of various polyamides. [17][18][19][20] Additionally, there have been several documented cases of PA6 flammability being effectively curtailed through incorporation of small molecules, intumescent additives, polymers, and nanoparticles. [16,[21][22][23][24] Regrettably, none of these studies have evaluated the 3D printability of the flame retardant PA6 composites they produced.…”

Section: Introductionmentioning

confidence: 99%

Environmentally Benign Flame Retardant Polyamide‐6 Filament for Additive Manufacturing

Kolibaba

Nigam

Tai

et al. 2021

Macro Materials & Eng

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The engineering applications of thermoplastic 3D printing filaments are currently limited by their inherent flammability, especially in fields such as automotive and aerospace, which require high standards for material safety. Polyamide-6 (PA6) is of particular interest for additive manufacturing but is a very flammable thermoplastic known to spread fires due to its aggressive melt-dripping. A flame retardant (FR) composite filament composed of PA6, ammonium polyphosphate, and aluminum phosphate is shown to be printable under identical conditions to commercially available PA6. Calorimetry measurements reveal that the composite filament generates a 7000% increase in char yield, along with 47% and 31% decreases in peak heat release rate and total heat release, respectively. Additionally, open flame testing demonstrates a significantly reduced capacity for this filament to spread fire to other nearby combustible materials. This unique FR additive system represents an important step toward improving the safety and utility of 3D printed parts.

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A novel organic‐inorganic flame retardant of ammonium polyphosphate chemically coated by Schiff base‐containing branched polysiloxane for polyamide 6

Cited by 25 publications

References 31 publications

Crystal structure and Hirshfeld surface analysis of dimethyl 3,3′-{[(1E,2E)-ethane-1,2-diylidene]bis(azanylylidene)}bis(4-methylbenzoate)

Crystal structure and Hirshfeld surface analysis of dimethyl 3,3′-{[(1E,2E)-ethane-1,2-diylidene]bis(azanylylidene)}bis(4-methylbenzoate)

Structure regulation of boron‐doped calcium hydroxystannate and its enhancement on flame retardancy and mechanical properties of PVC

Environmentally Benign Flame Retardant Polyamide‐6 Filament for Additive Manufacturing

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