Nickel alginate‐enhanced fire safety of aluminum diethylphosphinate on epoxy resin

Abstract

To attain superior fire safety epoxy resins (EP), aluminum diethylphosphonate (AlPi) and nickel alginate were incorporated to EP in different proportions. The synergistic flame retardant effects between AlPi and nickel alginate on fire safety and mechanical properties of EP were investigated in detail. EP/AlPi9.5‐Nickel Alginate0.5 acquired the UL‐94 V‐0 rating with the highest limiting oxygen index value (28.9%). Besides, the thermal decomposition behaviors of the samples were researched by thermogravimetric analysis, implying that EP/AlPi‐Nickel Alginate exhibited the better thermal stability and char‐forming ability. Compared with EP, the peak heat release rate and total heat release were declined by 58.3% and 12.8%. And the addition of nickel alginate reduced the release of smoke. In particular, the incorporation of AlPi and nickel alginate increased the impact strength, flexural strength and glass transition temperature of EP. In perspective, the synergistic effect of bio‐based nickel alginate and AlPi opens a practicable avenue in decreasing the fire risk and improving the mechanical properties of EP.

Robust, Flame-Retardant, and Anti-Corrosive Waterborne Polyurethane Enabled by a PN Synergistic Flame-Retardant Containing Benzimidazole and Phosphinate Groups

“…As shown in Figure 5 , no obvious differences were observed in the gas phase products between WPU-0 and WPU/FR9, implying that the introduction of BIEP-ETA did not alter the degradation path of WPUs. The typical characteristic signals of the decomposition products of waterborne polyurethanes, including 2977–2862 cm −1 (hydrocarbon compounds), 2372–2358cm −1 (gases containing CO 2 ), 2295–2264 cm −1 , 668 cm −1 (NCO groups and HCN), 1738 cm −1 (C=O), 1108 cm −1 (ethers), and 921 cm −1 (NH 3 ) [ 32 , 33 , 34 ], all appear in the spectra of both WPU-0 and WPU/FR9. For WPU-0, gases containing CO 2 and hydrocarbon compounds are released at 240 °C; this may be the degradation of DMPA.…”

Facile Construction of Inorganic Phosphorus/Boron-Layered Double Hydroxide Complexes for Highly Efficient Fire-Safety Epoxy Resin

“…However, the complex preparation process, the massive use of organic solvents in preparation, and the low smoke suppression capacity of the DOPO-based flame retardants during combustion are still a challenge . Oppositely, inorganic flame retardants can effectively reduce the heat and smoke production of EP composites, but the flame-retardant efficiency is unsatisfactory and high loadings are needed to obtain the good flame retardancy of EP, − resulting in the negative impacts on the mechanical performances. To balance the flame-retardant efficiency and mechanical properties of inorganic flame retardants, some organic–inorganic or inorganic–inorganic flame retardants are prepared and investigated.…”

Tailored Catalysis Inducing Exceptionally Fire-Safe and Mechanically Reinforced Epoxy at An Ultralow Loading

“…The key scientific issue was accordingly to select a proper catalytic species with a suitable state for velocity-tailored catalysis. Distinct from nickel- and cobalt-based nanocatalysts, , an iron-based catalyst presented a more remarkable divergence with a coexisting catalytic decomposition and catalytic charring toward the epoxy matrix. , The decomposed products from the catalytic decomposition of epoxy provided a constituent fuel for a catalytic charring behavior toward a polyaromatic charring reaction. Aiming to accelerate the charring behavior, an iron-based nanocatalyst featured a relatively weaker catalytic decomposition and stronger catalytic charring was desirable.…”