Mechanically strong and flame-retardant epoxy resins with anti-corrosion performance

Yuan-fang, AI; Xia, Long; Pang, Fu-Qu; Xu, Yanlian; Zhao, Haibo; Jian, Rong-Kun

doi:10.1016/j.compositesb.2020.108019

Cited by 146 publications

(44 citation statements)

References 55 publications

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“…On the one hand, after adding DST, although the crosslinking density was slightly reduced, lots of rigid groups were introduced into EP cross‐linked network, which can form π – π interaction with matrix. [ 50 ] On the other hand, a large number of hydrogen bonds were generated owing to the existence of multiple heteroatoms in DST, causing the formation of physical crosslinking points and the increase of the crosslinking density. [ 51 ]…”

Section: Resultsmentioning

confidence: 99%

A DOPO Derivative Constructed by Sulfaguanidine and Thiophene toward Enhancing Fire Safety, Smoke Suppression, and Mechanical Properties of Epoxy Resin

Duan

Zou

Cao

et al. 2021

Macro Materials & Eng

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In order to eliminate the negative effect of traditional 9,10‐dihydro‐9‐oxa‐10‐phosphaphenanthrene‐10‐oxide (DOPO) ‐based flame retardants on heat resistance, mechanical properties, and curing process of epoxy resin (EP), a DOPO derivative (DST) constructed by sulfaguanidine and thiophene is designed and used as co‐cured agent for EP. Compared with EP, the maximum decrease of glass transition temperature (Tg) in all EP/DST samples is less than 5%, indicating EP modified by DST maintains good heat resistance. Encouragingly, DST shows satisfactory flame‐retardant efficiency and excellent smoke suppressing effects. EP containing barely 5 wt% of DST (P content: 0.37 wt%) achieves a UL‐94 V‐0 rating and 32.8% limited oxygen index (LOI) value. Its peak heat release rate (PHRR), total heat release (THR), and total smoke production (TSP) are also decreased by 31.2%, 18.8%, and 30.2% . Further, DST significantly improves mechanical properties of the EP/DDM/DST system. The tensile strength and modulus increase by 37.2% and 14.6%, respectively, as DST content is 7.5 wt%. It is revealed that DST has positive quenching and diluting effects in the gas phase, as well as promoting the formation of a compact char layer in the condensed phase.

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Section: Resultsmentioning

confidence: 99%

A DOPO Derivative Constructed by Sulfaguanidine and Thiophene toward Enhancing Fire Safety, Smoke Suppression, and Mechanical Properties of Epoxy Resin

Duan

Zou

Cao

et al. 2021

Macro Materials & Eng

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“…Thermogravimetric analysis (TGA) was carried out using a Q50 thermogravimetric analyzer (TA Instruments, USA) under nitrogen atmosphere with a heating rate of 20°C min −1 . The limiting oxygen index (LOI) of the samples was determined according to ASTM D2863 using a JF‐5 limiting oxygen index meter (Jiangning, China), with a gas flow rate of 10 L min −1 and a gas concentration of 99.99% 30 . Vertical combustion test of the samples was determined according to ASTM D3801 using a CZF‐6 horizontal vertical combustion tester (Jiangning, China) with a flame height of 25 mm 30 …”

Section: Methodsmentioning

confidence: 99%

Construction of thermoplastic cellulose esters matrix composites with enhanced flame retardancy and mechanical properties by embedding hydrophobic magnesium hydroxide

Zhang

Zhou

Zhang

et al. 2021

J of Applied Polymer Sci

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Biomass‐based composites with renewability and biodegradability have attracted extensive researches, but their applications are hindered by poor mechanical properties and flame retardancy. Cellulose ester matrix composites (CEMC), a kind of biomass‐based composites, were prepared with inorganic crystals as flame retardant and reinforcement. Cellulose acetate oleate (CAO) prepared by mechanical activation‐assisted solid‐phase reaction was used as thermoplastic matrix. Hydrophobic oleate‐magnesium hydroxide (O‐MH), which was surface‐modified with oleic acid, was embedded into CAO to prepare O‐MH/CAO composites by hot pressing. The introduction of oleoyl contributed to favorable thermoplasticity of cellulose ester, resulting in enhanced thermal stability and mechanical properties of CEMC. The uniform dispersion of O‐MH in the CAO matrix via metal–organic coordination increased the mechanical properties and flame retardancy of O‐MH/CAO composites, ascribing to the toughening effect and combustion inhibition effect induced by O‐MH. This study provides a feasible technology for fabricating the CEMC with outstanding thermal stability and mechanical properties.

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“…Most recently, TG-FTIR and py-GC/MS have been always used to identify the products in the gaseous phase. [36][37][38][39] Therefore, TG-FTIR is utilized to further explore the difference between the pyrolytic products of PLA and PLA/DOT. Figure 8 shows the FTIR spectra of pyrolysis products for PLA, PLA/DOT- ) also exist in PLA/DOT-3.…”

Section: Analysis Of the Pyrolytic Productsmentioning

confidence: 99%

The effect of Tris‐phosphaphenanthrene based phosphonate on the flame retardance, thermal decomposition, and crystallization of bio‐based poly(lactic acid)

Xia

Pang

Wei

et al. 2021

J of Applied Polymer Sci

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With the aim to reduce the flammability of poly(lactic acid) (PLA), herein, Tris-phosphaphenanthrene based phosphonate (DOT) originated from 10hydroxy-9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO-OH) and trihydroxymethyl aminomethane (Tris) was incorporated. Interestingly, DOT showed superior flame-retardant efficiency for PLA, that was, PLA with 1 wt% DOT displayed a LOI value at 29.0%, about 49.0% increment as compared to virgin PLA, and passed a UL-94V-0 rating. Apart from the mentioned, cone calorimeter tests clearly demonstrated that DOT was beneficial for reducing the heat release in the whole combustion to some extent, for example, the peak heat release rate and the maximum average values of heat emission with a reduction of 15% and 17%, respectively. It was speculated that the improved flame retardance of PLA containing DOT was related to the melting dropletpromotion effect and the vapor-phase activity of DOT. Meanwhile, thermal stabilities of PLA/DOT were well maintained as compared to virgin PLA. Moreover, the existence of DOT promoted the crystallization of PLA owing to the nucleating effect of DOT.

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Mechanically strong and flame-retardant epoxy resins with anti-corrosion performance

Cited by 146 publications

References 55 publications

A DOPO Derivative Constructed by Sulfaguanidine and Thiophene toward Enhancing Fire Safety, Smoke Suppression, and Mechanical Properties of Epoxy Resin

A DOPO Derivative Constructed by Sulfaguanidine and Thiophene toward Enhancing Fire Safety, Smoke Suppression, and Mechanical Properties of Epoxy Resin

Construction of thermoplastic cellulose esters matrix composites with enhanced flame retardancy and mechanical properties by embedding hydrophobic magnesium hydroxide

The effect of Tris‐phosphaphenanthrene based phosphonate on the flame retardance, thermal decomposition, and crystallization of bio‐based poly(lactic acid)

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