文献类型：期刊文献

英文题名：Morphology-Controlled Anhydrous Magnesium Carbonate for Flame-Retardant and Smoke-Suppressant Ethylene-Vinyl Acetate Composites

作者：Hu, Yahan[1];Xu, Shiai[1,2];Cheng, Jiaxu[1];Cheng, Lihong[3]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai, Peoples R China;[2]Qinghai Univ, Sch Chem Engn, Natl Collaborat Innovat Ctr Salt Lake Resource Che, Xining, Peoples R China;[3]Shanghai Elect Grp Power Transmiss & Distribut Equ, Shanghai, Peoples R China

年份：2026

外文期刊名：JOURNAL OF VINYL & ADDITIVE TECHNOLOGY

收录：;EI(收录号：20262921111398);Scopus(收录号：2-s2.0-105044664643);WOS:【SCI-EXPANDED(收录号:WOS:001819792500001)】；

基金：This work was supported by the National Natural Science Foundation of China (U22A20434).

语种：英文

外文关键词：anhydrous magnesium carbonate; EVA; flame retardancy; morphology effect; smoke suppression

摘要：Magnesium carbonate-containing minerals are widely used as halogen-free flame retardants in polymers. This work focuses on the previously underexplored role of particle morphology in fire performance. For this, cubic (CMC) and spherical anhydrous magnesium carbonate (SMC) were synthesized via a hydrothermal route and then incorporated into ethylene-vinyl acetate (EVA) composites, and the effects of their morphologies on thermal stability, combustion, smoke suppression, and mechanical properties were investigated. Although both CMC and SMC can significantly enhance the flame retardancy of the composites, notable differences are observed in fire performance. Compared to neat EVA, the peak heat release rate and peak smoke production rate of EVA/CMC are decreased by 74.1% and 69.0%, respectively. This is attributed to the formation of a more compact and continuous inorganic-carbonaceous char layer, as well as the enhanced catalytic smoke suppression effect of MgO residues. CMC also demonstrates improved interfacial compatibility with the EVA matrix, thus leading to better retention of mechanical properties compared to SMC. This work highlights the critical role of particle morphology in the fire resistance of magnesium carbonate and provides new insights into the design of high-performance mineral-based flame retardants.