文献类型：期刊文献

英文题名：PEG-Regulated and Silane-Bridged Magnesium Carbonate With Controllable Particle Size for High-Performance Flame-Retardant EVA Composites

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

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai, Peoples R China;[2]Qinghai Univ, Natl Collaborat Innovat Ctr Salt Lake Resource Che, Sch Chem Engn, 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 APPLIED POLYMER SCIENCE

收录：;EI(收录号：20263221268670);Scopus(收录号：2-s2.0-105046749179);WOS:【SCI-EXPANDED(收录号:WOS:001842291800001)】；

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; GPTMS; KH550; MCA

摘要：In this study, polyethylene glycol (PEG) of different molecular weights was employed to regulate the growth of anhydrous magnesium carbonate (AMC). The resulting PEG-2000-modified AMC exhibited optimal particle size and enhanced dispersion in ethylene-vinyl acetate (EVA). Then, AMC was subjected to surface modification with gamma-aminopropyltriethoxysilane (KH550) and chemical bridging with melamine cyanurate (MCA) via gamma-glycidoxypropyltrimethoxysilane (GPTMS), which was termed KMA. This unique structure significantly enhanced the dispersion of flame retardant components and their interfacial compatibility with the EVA matrix, making it possible to simultaneously improve flame retardancy and mechanical properties at high filler loadings. The EVA composite containing 50 wt% of KMA demonstrates superior flame-retardant performance evidenced by the increase in limiting oxygen index (LOI) from 18.6% to 27.4% and a UL-94 V-1 rating. The peak heat release rate (pHRR) and peak smoke production rate (pSPR) are reduced by 69.6% and 52.1%, respectively. Compared to EVA/AMC composites, the tensile strength and elongation at break of EVA/KMA composites are increased by 10.4% and 5.8%, respectively. This work presents a novel strategy for AMC modification and the development of high-performance flame-retardant EVA composites.