摘要
利用丁香酚环氧和环四硅氧烷硅氢加成得到新型生物基环氧树脂D4EUEP,通过核磁共振氢谱和飞行时间质谱表征其准确结构。使用非等温DSC对D4EUEP/33DDS固化体系进行分析,采用双参数自催化模型和Málek判据建立了该体系固化动力学模型。模型计算结果与实验结果相关系数大于99%,证明该模型可以较好地描述D4EUEP/33DDS体系的固化过程。通过AICM方法研究了体系的有效活化能与转化率之间的关系,揭示了微观反应机理的变化,并通过Vyazovkin法对D4EUEP/33DDS体系进行了等温固化预测。
A novel eugenol-based siloxane epoxy resin(D4EUEP)was synthesized from eugenol glycidyl ether and tetramethyl-cyclotetrasiloxane.The molecular structure was characterized by 1H NMR and MALDI-TOF.The nonisothermal curing behavior of D4EUEP/33DDS system was characterized with differential scanning calorimetry(DSC),showing the relationship between temperature and heat rate.The isoconversional?esták–Berggren model and Málek method were used to analyze the curing kinetics and established curing kinetic model.All the kinetic parameters were acquired and the explicit rate equations were constructed.The curing kinetic prediction was made in great coincidence with the experimental data.On the other hand,advanced isoconversional method(AICM)revealed the relationship between the conversion and activation energy and discussed the microscopic mechanisms during the curing process.Vyazovkin method was also used to predict the isothermal curing process in different temperature.
作者
郑杰元
张先伟
万金涛
范宏
ZHENG Jieyuan;ZHANG Xianwei;WAN Jintao;FAN Hong(State Key Laboratory of Chemical Engineering,College of Chemical and Biological Engineering,Zhejiang University,Hangzhou 310027,Zhejiang,China;Transfar Zhilian Company,Limited,Hangzhou 311215,Zhejiang,China;School of Materials Science and Engineering,Shaanxi Normal University,Xi’an 710062,Shaanxi,China)
出处
《化工学报》
EI
CSCD
北大核心
2023年第2期924-932,共9页
CIESC Journal
基金
国家重点研发计划项目(2017YFE0116000)
国家自然科学基金项目(21875131)。
