Unleashing the Power of Bio-based Thermotropic Liquid Crystal Modifiers:Toughening and Reinforcing Petroleum-based Epoxy Resin without Compromising Other Properties  

作　　者：Qing-Yun Lu Hong-Wei Gu Jia-Hui Li Qian-Qian Fan Bei-Tao Liu Yan Kou Xi-Gao Jian Zhi-Huan Weng 

机构地区：[1]State Key Laboratory of Fine Chemicals,Frontiers Science Center for Smart Materials,Liaoning Technology Innovation Center of High Performance Resin Materials,Department of Polymer Science&Engineering,Dalian University of Technology,Dalian 116024,China [2]Thermochemistry Laboratory,Liaoning Province Key Laboratory of Thermochemistry for Energy and Materials,Dalian National Laboratory for Clean Energy,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,China

出　　处：《Chinese Journal of Polymer Science》2024年第8期1093-1102,共10页高分子科学（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.52073038 and 51873027);the Fundamental Research Funds for the Central Universities(No.DUT22LAB605)。

摘　　要：Toughening the petroleum-based epoxy resin blends with bio-based modifiers without compromising their modulus,mechanical strength,and other properties is still a big challenge in view of the sustainability.In this study,a bio-based liquid crystal epoxy resin(THMT-E P)with an s-triazine ring structure was utilized to modify a petroleum-based bisphenol A epoxy resin(E51)with 4,4'-diaminodiphenylsulfone(DDS)as a curing agent,and the blended systems were evaluated for their thermal stability,mechanical properties,and flame retardancy.The results showed that the impact strength of the blended system initially increased and then decreased with the increase in THMT-EP content,and it reached the a maximum value of 26.5 kJ/m^(2)when the THMT-EP content was 5%,which was 31.2%higher than that of E51/DDS.Notably,the flexural strength,modulus,and glass transition tem perature of the blended system were all simultaneously improved with the addition of THMT-EP.At the same time,the addition of THMT-EP enhanced the flame retardancy of the system by increasing the char yield at 700℃and decreasing the peak heat release rate and total heat release rate.This work paves the way for a more sustainable improvement in the comprehensive performance of epoxy resin.

关 键 词：Epoxy resin TOUGHENING Bio-based Thermotropic liquid crystal 

分 类 号：TQ323.5[化学工程—合成树脂塑料工业] O753.2[理学—晶体学]