Synthesis of Bio-based Epoxy Containing Phosphine Oxide as a Reactive Additive Toward Highly Toughened and Fire-retarded Epoxy Resins  

作　　者：Chunxiang Wei Tianyu Gao Yu Xu Wenjie Yang Guangjian Dai Ruiting Li SanE Zhu Richard K.K.Yuen Wei Yang Hongdian Lu 

机构地区：[1]School of Energy,Materials and Chemical Engineering,Hefei University,Hefei 230601,China [2]Yusuf Hamied Department of Chemistry,University of Cambridge,Cambridge CB21EW,U.K. [3]Department of Architecture and Civil Engineering,City University of Hong Kong,Hong Kong 999077,China

出　　处：《Chinese Journal of Polymer Science》2023年第11期1733-1746,I0007,共15页高分子科学(英文版)

基　　金：Anhui Provincial Natural Science Foundation for Distinguished Young Scholar(No.2008085J26);Natural Science Foundation in University of Anhui Province(Nos.KJ2021ZD0119 and 2022AH040251);China Scholarship Council(No.202008340021);Start-up Fund for Distinguished Scholars in Hefei University(No.20RC37);Anhui Provincial Natural Science Foundation(No.2108085QB47);Research Grants Council of the Hong Kong Special Administrative Region(No.City U 11208617)。

摘　　要：The integration of high mechanical toughness,impact strength as well as excellent flame-retardant properties toward epoxy resins(EPs)have always been a dilemma.The inadequate overall performance of EPs severely restricts their sustainable utilization in engineering aspects over long-term.Herein,a new bio-based agent(diglycidyl ether of magnolol phosphine oxide,referred as DGEMP)derived from magnolol(classified as lignan),extracted from natural plants Magnolia officinalis,was successfully synthesized and further employed as a flameretardant reactive additive to diglycidyl ether of bisphenol A(DGEBA).As demonstration,the composite resin,DGEBA/15DGEMP(15 wt%DGEMP),achieved an Underwriters Laboratories-94 V-0 rating with a high limiting oxygen index(LOI)value(41.5%).In cone calorimeter tests,it showed that heat release and smoke production were effectively inhibited during combustion,wherein the peak heat release rate(PHRR)value of DGEBA/15DGEMP was reduced by 50%compared to neat DGEBA.Additionally,it exhibited a superior tensile strength(82.8 MPa),toughness(5.11MJ/m^(3))and impact strength(36.5 k J/m^(2)),much higher than that of neat DGEBA(49.7 MPa,2.05 MJ/m^(3)and 20.9 k J/m^(2)).Thus,it is highly anticipated that DGEMP imparts significantly improved mechanical and fire-retarded properties to conventional EPs,which holds a great potential to address the pressing challenges in EP thermosets industry.

关 键 词：Epoxy resin MAGNOLOL Phosphine oxide TOUGHNESS Flame retardant 

分 类 号：TQ323.5[化学工程—合成树脂塑料工业]