Flame retardant performance of a carbon source containing <scp>DOPO</scp> derivative in <scp>PET</scp> and epoxy

Fang, Yinchun; Zhou, Xiang; Xing, Zhiqi; Wu, Yarong

doi:10.1002/app.44639

Cited by 36 publications

(17 citation statements)

References 40 publications

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“…As typical thermosetting plastic, epoxy thermoset was often processed with various curing agents to form steady three‐dimensional mesh structure, generally possessing excellent electrical insulation, chemical corrosion resistance, sealing performance, and remarkable dimensional stability . Hence, epoxy thermosets have been widely applied in various industry fields, such as electrical insulation materials, printed circuit board, adhesive, mobile phone materials, surface coating, and so on .…”

Section: Introductionmentioning

confidence: 99%

Flame retardant and toughening behaviors of bio‐based DOPO‐containing curing agent in epoxy thermoset

Yao

Qian

Qiu

et al. 2019

Polymers for Advanced Techs

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Based on bio-based furfural, a phosphorus-containing curing agent (FPD) was successfully synthesized, via the addition reaction between 9,10-dihydro-9-oxa-10 phosphaphenanthrene-10-oxide (DOPO) and furfural-derived Schiff base. Then, as co-curing agent, FPD was used to prepare flame retardant epoxy thermosets (EP) cured by 4, 4′-diaminodiphenyl methane. The incorporated FPD improved the flame retardancy and toughness of epoxy thermoset, simultaneously. When 5 wt% FPD was added into EP, the FPD/EP achieved 35.7% limited oxygen index (LOI) value and passed UL94 V-0 rating, meanwhile. In FPD/EP thermoset, the incorporated FPD reduced the thermal decomposition rate, increased the charring capacity, and inhibited the combustion intensity of epoxy thermoset. Through gas-phase and condensed-phase actions in weakening fuel supply, suppressing volatile combustion, and enhancing charring barrier effect, FPD decreased the heat release of burning epoxy thermoset, significantly. For the outstanding effectiveness on both flame retardancy and toughness, the study on FPD provides a promising way to manufacture high-performance epoxy thermoset.

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Section: Introductionmentioning

confidence: 99%

Flame retardant and toughening behaviors of bio‐based DOPO‐containing curing agent in epoxy thermoset

Yao

Qian

Qiu

et al. 2019

Polymers for Advanced Techs

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“…And PET fiber is a thermoplastic polymer, so melt dripping would occur during combustion which would bring out severe secondary disasters. [1][2][3] Therefore, the improvement of the flame retardancy and anti-dripping performance of PET fiber is even urgently needed. 4,5 Halogen-containing compounds were once used as effective flame retardants for PET, which were forbidden due to the environmental issues.…”

Section: Introductionmentioning

confidence: 99%

Layer-by-layer assembly flame-retardant and anti-dripping treatment of polyethylene terephthalate fabrics

Fang

Liu

Wang

2019

Journal of Engineered Fibers and Fabrics

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Layer-by-layer assembly is a simple and effective method which has been widely studied to improve the flame retardancy of textiles in recent years. In this article, flame-retardant and anti-dripping polyethylene terephthalate fabrics were successfully prepared by layer-by-layer assembly branched polyethylenimine and ammonium polyphosphate on their surface. The results of limiting oxygen index values and vertical burning test revealed that the flame retardancy and anti-dripping performance of polyethylene terephthalate fabrics were improved after the layer-by-layer assembly treatment; especially, the dripping phenomenon was eliminated when the number of branched polyethylenimine/ammonium polyphosphate bilayers was over 10. The influence of alkali treatment of polyethylene terephthalate fabrics before layer-by-layer assembly was also investigated. The results showed that alkali treatment of the polyethylene terephthalate fabrics would promote the combination of polyethylene terephthalate fabrics and the charged flame retardants indicating better flame retardancy. The results of thermogravimetric analysis revealed that layer-by-layer assembly treatment of polyethylene terephthalate fabrics would promote char formation both under the nitrogen atmosphere and under the air atmosphere which may act through condensed phase action. The scanning electron microscopy images of the char residues revealed that the layer-by-layer assembly treatment of polyethylene terephthalate fabrics would promote the formation of a compact and intact char residue, which was beneficial for the improvement of flame retardancy and anti-dripping performance. This research would provide the experimental basis for the effective flame retardancy and anti-dripping performance of polyethylene terephthalate fabric.

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“…DOPOCH 2 OH was synthesized according to the literature . DOPO 216 g (1.0 mol) and ethanol 600 mL were fed into a four‐necked round bottom flask equipped with a mechanical stirrer, a reflex condenser, a thermometer, and a dropping funnel.…”

Section: Methodsmentioning

confidence: 99%

An effective flame retardant for poly(ethylene terephthalate) synthesized by phosphaphenanthrene and cyclotriphosphazene

Fang

Zhou

Xing

et al. 2017

J of Applied Polymer Sci

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A novel flame retardant [9,10-Dihydro-9-oxa-10-phosphaphenanthrene-10-oxideô triphosphazene (DOPO-TPN)] based on phosphaphenanthrene and cyclotriphosphazene was synthesized and used to improve the flame retardancy of poly(ethylene terephthalate) (PET). The structure of DOPO-TPN was characterized by nuclear magnetic resonance, Fourier transform infrared spectroscope (FTIR), and elemental analysis. PET/DOPO-TPN composites with different amount of DOPO-TPN were prepared and the flame retardancy was determined by limiting oxygen index (LOI) and vertical burning test (UL-94). With the incorporation of 5 wt % DOPO-TPN, the composite achieved a LOI value of 34% and UL-94 V-0 rating. The thermal properties of the PET/DOPO-TPN composites were investigated by thermogravimetric analysis. The flame retardant mechanism was investigated by pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS), FTIR, and scanning electron microscopy (SEM). The Py-GC/MS results showed that DOPO based fragments would exist in the gas phase during the pyrolysis of PET/DOPO-TPN composites which demonstrated that DOPO-TPN could act through gas-phase action to exert flame retardant effect. The results of FTIR and SEM demonstrated that DOPO-TPN could promote the formation of compact and intact char residues to inhibit the heat and combustible gas transmission in condensed phase.

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Flame retardant performance of a carbon source containing DOPO derivative in PET and epoxy

Cited by 36 publications

References 40 publications

Flame retardant and toughening behaviors of bio‐based DOPO‐containing curing agent in epoxy thermoset

Flame retardant and toughening behaviors of bio‐based DOPO‐containing curing agent in epoxy thermoset

Layer-by-layer assembly flame-retardant and anti-dripping treatment of polyethylene terephthalate fabrics

An effective flame retardant for poly(ethylene terephthalate) synthesized by phosphaphenanthrene and cyclotriphosphazene

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