| E 51环氧树脂固化反应中动力学转变 |
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| 引用本文： | 吴唯,刘明昌,陈玉,浦伟光,吴祥.E 51环氧树脂固化反应中动力学转变[J].复合材料学报,2011,28(4):1-6. |
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| 作者姓名： | 吴唯 刘明昌 陈玉 浦伟光 吴祥 |
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| 作者单位： | 华东理工大学 材料科学与工程学院, 上海 200237 |
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| 摘 要： | 采用等温DSC法研究了E-51环氧树脂与4, 4’-二氨基二苯基砜(DDS)体系的固化反应过程, 并与已有固化模型拟合得到了170、180、190、200 ℃下的等温固化反应动力学的参数, 根据决定系数R2确定了适合的固化模型。研究表明: 当固化度小于40%时属于Kamal自催化模型; 当固化度大于40%时属于n级固化模型, 即固化反应由Kamal自催化反应向n级反应转变。
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| 关 键 词： | E-51环氧树脂 等温DSC 固化动力学 n级模型 Kamal模型 |
| 收稿时间： | 2010-08-19 |
Shifting of the curing kinetics of E-51 epoxy resin |
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| WU Wei,LIU Mingchang,CHEN Yu,PU Weiguang,WU Xiang.Shifting of the curing kinetics of E-51 epoxy resin[J].Acta Materiae Compositae Sinica,2011,28(4):1-6. |
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| Authors: | WU Wei LIU Mingchang CHEN Yu PU Weiguang WU Xiang |
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| Affiliation: | School of Materials Science and Engineering, East China University of Science &|Technology, Shanghai 200237, China |
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| Abstract: | The cure reaction kinetics of E-51 epoxy resin and 4,4’-diaminodiphenylsulfone(DDS) system was investigated by the isothermal DSC method, and isothermal curing kinetics parameters at 170, 180, 190, 200 ℃ were obtained through fitting between the experimental data and the curing model. According to the values of coefficient of determination (R2) of the fitted data, a suitable curing reaction kinetic model was determined. The reaction process shows to be dominated by different mechanism at different stages of the E-51/DDS system curing process, when the cure degree is less than 40%, the curing system is Kamal autocatalytic reaction model; when the cure degree is more than 40%, the curing system is nth order reation model, with an initial autocatalytic reaction shifting into an nth order reaction as the reaction proceeding. |
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