文献类型：期刊文献

英文题名：Preparation of a multifunctional flame retardant epoxy resin containing phosphorus and nitrogen and study of its properties

作者：Zhang, Yijun[1];Pan, Dawei[1];Chang, Changfan[1];Liu, Hua[2];Liu, Zuozhen[1,2,3]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Dept Res & Dev, Sino Polymer Co Ltd, Shanghai, Peoples R China;[3]Shanghai Huayi Resin Co Ltd, Shanghai, Peoples R China

年份：2022

卷号：139

期号：42

外文期刊名：JOURNAL OF APPLIED POLYMER SCIENCE

收录：;EI(收录号：20223512631924);WOS:【SCI-EXPANDED(收录号:WOS:000841875100001)】；

基金：Project of Scientific Research Program of Shanghai Science and Technology Commission, Grant/Award Numbers: 20511107302, 19511106602

语种：英文

外文关键词：flame retardance; resins; thermosets

摘要：A highly reactive intrinsic epoxy flame retardant FREP was successfully synthesized via ring-opening reaction between DOPO and amino-tetrafunctional epoxy resin (AG-601), and the structure of the synthesized FREP was characterized by FTIR and MS. FREP was then introduced into the epoxy resin as an additive, aiming to improve fire safety. The flame-retardant properties and thermal stabilities of epoxy thermosets were investigated by limiting oxygen index (LOI), vertical burning test (UL94) and cone calorimetry (CONE). The results indicated that EP/FREP-4 thermoset passed UL94 V-0 rating with a LOI value of 34.6%, where the phosphorus content was 1.5 wt%. When compared with neat EP, the peak heat release rate (pk-HRR), total heat release (THR) and total smoke production (TSP) decreased by 63.1%, 42.6%, and 22.1%, respectively. Meanwhile, the lower av-EHC of EP/FREP thermosets indicated that FREP plays a significant role in gas-phase flame retardancy. Additionally, DMA analysis showed that FREP improved the crosslinking density of EP, which had little effect on the glass transition temperature (T-g). Thermogravimetric analysis (TGA), Py-GC/MS analysis, and SEM were used to investigate the flame retardant mechanism. Excellent flame retardancy was attributed to phosphorus and nitrogen's synergistic effect in the gas and condensed phases.