A bio-based epoxy resin derived from p-hydroxycinnamic acid with high mechanical properties and flame retardancy  

作　　者：Xin Song Ze-Peng Deng Chun-Bo Li Fei Song Xiu-Li Wang Li Chen De-Ming Guo Yu-Zhong Wang 

机构地区：[1]The Collaborative Innovation Center for Eco-Friendly and Fire-Safety Polymeric Materials(MoE),National Engineering Laboratory of Eco-Friendly Polymeric Materials(Sichuan),State Key Laboratory of Polymer Materials Engineering,College of Chemistry,Sichuan University,Chengdu 610064,China

出　　处：《Chinese Chemical Letters》2022年第11期4912-4917,共6页中国化学快报（英文版）

基　　金：supported by National Natural Science Foundation of China(Nos.52073189 and 51822304);Science and Technology Fund for Distinguish Young Scholars of Sichuan Province(No.2019JDJQ0025);State Key Laboratory of Polymer Materials Engineering(No.sklpme2020-3-09);the Fundamental Research Funds for the Central Universities。

摘　　要：Recent advances in epoxy resins have been forward to achieving high mechanical performance,thermal stability,and flame retardancy.However,seeking sustainable bio-based epoxy precursors and avoiding introduction of additional flame-retardant agents are still of increasing demand.Here we report the synthesis of p-hydroxycinnamic acid-derived epoxy monomer(HCA-EP)via a simple one-step reaction,and the HCA-EP can be cured with 4,4′-diaminodiphenylmethane(DDM)to prepare epoxy resins.Compared with the typical petroleum-based epoxy resin,bisphenol A epoxy resin,the HCA-EP-DDM shows a relatively high glass transition temperature(192.9℃)and impressive mechanical properties(tensile strength of 98.3 MPa and flexural strength of 158.9 MPa).Furthermore,the HCA-EP-DDM passes the V-1 flammability rating in UL-94 test and presents the limiting oxygen index of 32.6%.Notably,its char yield is as high as 31.6%under N_(2),and the peak heat rate release is 60%lower than that of bisphenol A epoxy resin.Such findings provide a simple way of using p-hydroxycinnamic acid instead of bisphenol A to construct high-performance bio-based thermosets.

关 键 词：Epoxy resin Bio-based p-Hydroxycinnamic acid Mechanical performance Intrinsic flame retardancy 

分 类 号：TQ323.5[化学工程—合成树脂塑料工业]