摘要
以天然黄酮化合物柚皮素为原料制备了柚皮素生物基环氧基体(NEP),采用马来酸酐(MAH)、4,4-二氨基二苯甲烷(DDM)、糠胺(FA)以及5,5-亚甲基二糠胺(DFA)4种不同分子结构的固化剂分别固化NEP。通过考察不同固化物的力学性能、动态力学性质以及热稳定性,探究固化剂分子结构对柚皮素环氧性能的影响。结果表明,含有柔性结构的多官能度胺类固化剂更有利于高交联结构的形成;但受空间位阻效应的影响,多官能度胺类固化剂形成的交联密度仍明显低于小分子的酸酐类固化剂。其中,NEP/MAH固化物的交联密度最大,冲击强度也最高,为4.8 kJ/m2;其玻璃化转变温度和初始热降解温度分别为188.3℃和314℃。
The naringenin bio-based epoxy matrix(NEP)was synthesized from the natural flavonoid naringenin.Four curing agents with different molecular structures,including maleic anhydride(MAH),4,4-diaminodiphenylmethane(DDM),furfurylamine(FA)and 5,5-methylenedifurfurylamine(DFA)were used to cure NEP matrix respectively.By testing the mechanical properties,dynamic mechanical properties and thermal stability of the four cured products,the effect of the molecular structure of the curing agents on the properties of naringenin epoxy was explored.The results show that multifunctional amine curing agents with flexible structure are more favorable to the formation of high crosslinking structure.However,due to the steric hindrance effect,the crosslink density of multifunctional amine curing agents is still significantly lower than that of small molecule anhydride curing agents.Among them,NEP/MAH has the highest crosslink density and highest impact strength of 4.8 kJ/m2.The glass transition temperature and initial thermal degradation temperature are 188.3℃ and 314℃,respectively.
作者
赵格
刘志成
程宇豪
李林斌
任士通
杜永刚
Ge Zhao;Zhicheng Liu;Yuhao Cheng;Linbin Li;Shitong Ren;Yonggang Du(School of Materials Science and Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;Hebei Key Laboratory of Advanced Materials for Transportation Engineering and Environment,Shijiazhuang 050043,China)
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2023年第6期78-84,共7页
Polymer Materials Science & Engineering
基金
河北省自然科学基金资助项目(B2019210221)
石家庄铁道大学硕士研究生创新项目(YC2021065)。
关键词
环氧树脂
柚皮素
固化剂
力学性能
epoxy resin
naringenin
curing agent
mechanical properties
