Flame-Retardant and Smoke-Suppressive Epoxy Resins with Enhanced Storage and Thermal Stability via Curing with a Phosphorus-Containing Imidazole Derivative

IF 4.4 2区化学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Applied Polymer Materials Pub Date : 2025-03-17 DOI:10.1021/acsapm.5c0025510.1021/acsapm.5c00255

Haonan Wang, Qiu Shi, Siqi Huo*, Cheng Wang, Guofeng Ye, Qi Zhang, Hao Wang and Zhitian Liu*,

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引用次数: 0

Abstract

Addressing the flammability of epoxy resins and simplifying the production process remain huge challenges. In this work, an imidazole-derived phosphorus/nitrogen-containing latent curing agent (ATIM) was synthesized using nitrilotrimethylene triphosphonic acid (ATMP) and 1-methylimidazole as raw materials for fabricating a single-component flame-retardant epoxy (EP). The ATIM-cured EP (EP/ATIM) showed desired flame-retardant properties, and its UL-94 classification reached V-0 when ATIM content increased to 13 wt %. The limiting oxygen index (LOI) of EP/ATIM-15 (ATIM content: 15 wt %) reached 33.0%, and its peak heat release rate (PHRR) and peak smoke production rate (PSPR) were 51.9 and 41.4% lower than those of the imidazole (IM)-cured EP (EP/IM-7, IM content: 7 wt %), respectively, which demonstrated considerable progress in both flame resistance and smoke reduction properties. EP/ATIM exhibited a higher onset decomposition temperature and greater char residue compared with EP/IM-7, demonstrating superior thermal stability. The shelf life of EP/ATIM-15 could be up to 7 days, confirming that the introduction of P-containing acid endowed EP/ATIM with increased storage stability. Thus, this study offers a feasible strategy for enhancing the storage stability, fire retardant performance, and thermal properties of a single-component epoxy resin.

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来源期刊

ACS Applied Polymer Materials Multiple-

CiteScore

7.20

自引率

6.00%

发文量

810

期刊介绍： ACS Applied Polymer Materials is an interdisciplinary journal publishing original research covering all aspects of engineering, chemistry, physics, and biology relevant to applications of polymers. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrates fundamental knowledge in the areas of materials, engineering, physics, bioscience, polymer science and chemistry into important polymer applications. The journal is specifically interested in work that addresses relationships among structure, processing, morphology, chemistry, properties, and function as well as work that provide insights into mechanisms critical to the performance of the polymer for applications.