High-performance flame-retardant polycarbonate composites: Mechanisms investigation and fire-safety evaluation systems establishment

Mu, Xiaowei; Jin, Ziyu; Chu, Fukai; Cai, Wei; Zhu, Yulu; Yu, Bin; Song, Lei; Hu, Yuan

doi:10.1016/j.compositesb.2022.109873

Cited by 87 publications

(24 citation statements)

References 24 publications

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“…Comparing the residues at 700 °C, it is found that with the increase of the addition amount, the amount of residual char gradually increased, and DIDOPO with conjugated structure had a certain role in promoting carbonization. It is considered that PxOy compounds will be formed based on the reaction of phosphorus and oxygen, and these PxOy compounds will further generate phosphoric acids with H 2 O, which can promote the formation surface protective char layers, thus play a flame retardant role in condensed-phase (Ramani et al, 2010;Cao et al, 2022a;Lu et al, 2022;Mu et al, 2022). This is consistent with the phenomenon that there is a small amount of 3.4 Analysis of gas phase products in thermal degradation of PET/DIDOPO conjugated flame retardant composites…”

Section: Analysis Of Thermal Degradation Behavior Of Pet/didopo Conju...mentioning

confidence: 53%

“…Besides, PET/DIDOPO has many characteristic peaks of phosphoruscontaining substances at 700 cm −1 ~1500 cm −1 . It can be seen that DIDOPO will generate a large number of phosphorus-containing free radicals during the degradation process, and these free radicals will capture free radicals (e.g.,O•and H radicals) in the gas phase, which can reduce the amount of combustible products and avoid the spread of combustion reactions (Cao et al, 2022b;Mu et al, 2022).…”

Section: Analysis Of Thermal Degradation Behavior Of Pet/didopo Conju...mentioning

confidence: 99%

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Thermal degradation behavior and flame retardant properties of PET/DiDOPO conjugated flame retardant composites*

Xiang

Gao

et al. 2022

Front. Chem.

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PET/DIDOPO conjugated flame retardant composites were prepared by melt blending of styrene bridged DOPO (DIDOPO) into polyethylene terephthalate (PET). The flame retardancy, rheological behavior, and thermal degradation behavior of the composite were characterized by vertical combustion test (UL-94), limit oxygen index test (LOI), rotational rheometer, and thermogravimetry (TG). The results showed that the flame retardant composite with V-0 grade was obtained when the amount of DIDOPO is 12.5wt%, and the corresponding LOI value was 56.87% higher than that of PET. The thermogravimetry-fourier infrared spectroscopy (TG-FTIR) test results showed that DIDOPO could promote the degradation of PET/DIDOPO materials, and release phosphorus-containing free radicals to quench the flame, therefore slowing down the combustion process, and mainly playing the key flame retardant role in gas-phase.

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Section: Analysis Of Thermal Degradation Behavior Of Pet/didopo Conju...mentioning

confidence: 53%

Section: Analysis Of Thermal Degradation Behavior Of Pet/didopo Conju...mentioning

confidence: 99%

Thermal degradation behavior and flame retardant properties of PET/DiDOPO conjugated flame retardant composites*

Xiang

Gao

et al. 2022

Front. Chem.

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“…The gas‐phase of Cot/AEP/IL was mainly investigated by the TG‐IR test. It has been reported that the EHC curve obtained from the CCT was related to the heat release of volatiles 58–60 . The EHC curve of untreated cotton and Cot/AEP/IL were shown in Figure 10A.…”

Section: Resultsmentioning

confidence: 93%

Surface modification of epichlorohydrin‐modified aramid nanofibers using ionic liquid to improve the fire safety and tensile strength of cotton fabrics

Wang

Feng

Piao

et al. 2022

Polymers for Advanced Techs

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In this article, flame‐retardant cotton fabric was prepared by a step‐by‐step dip‐coating method, in which flame retardants were introduced onto the surface of the cotton fabric by hydrogen bonding association and surface grafting reaction. First, the epichlorohydrin‐modified aramid nanofibers (AEP) were accumulated onto the surface of cotton fabric (Cot/AEP) through hydrogen bond association. Subsequently, the ionic liquid (IL) was grafted onto the surface of AEP to obtain Cot/AEP/IL. The fire safe performance of cotton fabrics was investigated by the limiting oxygen index test (LOI), vertical flammability test (VFT), and cone calorimeter test (CCT), and so forth. The LOI value of Cot/AEP/IL was as high as 29.5%. The VFT results showed that Cot/AEP/IL was self‐extinguishing rather than ignited, leaving a char length of 111 mm. The CCT results demonstrated that the peak heat release rate and total heat release of Cot/AEP/IL decreased by 42.5% and 58.8% compared with untreated cotton fabrics, respectively. The TG test showed that Cot/AEP/IL had more residues left than untreated cotton under both N2 and air atmospheres. The presence of phosphorus enables the cotton fabric to generate an aromatic phosphor carbonaceous structure during the combustion process. In addition, the tensile strength of cotton fabric was tested. After the introduction of AEP/IL, the average tensile strength value of untreated cotton improved from 129 to 167 N in the warp direction and 125–155 N in the weft direction. In summary, the introduction of AEP/IL improved both the flame‐retardant and mechanical properties of the cotton fabric significantly.

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“…[4][5][6][7][8] Therefore, the development of green flame retardants has gradually attracted the attention of experts and scholars. [9][10][11][12][13] Organophosphorus compounds, have drew the attention of many scholars thanks to high efficiency and low toxicity, which it works on condensed phase through promoting charring and gaseous phase through fire inhibition. [14][15][16][17][18][19] Lately, DOPO have become research hot benefited by its flexible structure designability and high flame-retardant activity.…”

Section: Introductionmentioning

confidence: 99%

“…With the enhancement of environmental protection requirements, some halogen compounds, are commonly used previously, which have been already gradually prohibited because of corrosive and toxic substances released during burning 4–8 . Therefore, the development of green flame retardants has gradually attracted the attention of experts and scholars 9–13 …”

Section: Introductionmentioning

confidence: 99%

A phosphaphenanthrene‐based derivative for simultaneously improving flame retardant and smoke suppression of epoxy resin composites

Wang

Yuan

Wang

et al. 2022

Polymers for Advanced Techs

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Epoxy resin (EP) have the disadvantage of high flammability and large amount of smoke, which greatly restricts its wide application in basic material. In order to obtain EP with excellent smoke inhibition and flame retardance, the flame retardant called as PBO, which with both condensed phase and gas phase flame‐retardant effects, was synthesized by the reaction among p‐phenylenediamine, DOPO, and indole‐3‐carboxaldehyde. From combustion results, EP containing PBO obtained V‐0 grade with a significantly improvement from 22.5% to 30.2% in limiting oxygen index. In comparison with EP, total smoke production, total heat release and the peak of heat release of EP/PBO‐1.0 were declined by 32%, 41.5%, and 37.4%, respectively. Besides, Tg of EP composites also had a certain degree of improvement, which due to the increase of rigidity and crosslinking density of EP caused by the addition of PBO. Meanwhile, the analysis of chars and pyrolysis products of PBO presented that the improvement was assigned to two phase synergy through barrier effect of chars in condensed phase and interrupt chain reaction in gaseous phase.

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High-performance flame-retardant polycarbonate composites: Mechanisms investigation and fire-safety evaluation systems establishment

Cited by 87 publications

References 24 publications

Thermal degradation behavior and flame retardant properties of PET/DiDOPO conjugated flame retardant composites*

Thermal degradation behavior and flame retardant properties of PET/DiDOPO conjugated flame retardant composites*

Surface modification of epichlorohydrin‐modified aramid nanofibers using ionic liquid to improve the fire safety and tensile strength of cotton fabrics

A phosphaphenanthrene‐based derivative for simultaneously improving flame retardant and smoke suppression of epoxy resin composites

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