| 非等温DSC法研究高韧性低收缩环氧体系固化动力学 |
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| 引用本文： | 张竞,李全步,蒋英,王晓东,黄培. 非等温DSC法研究高韧性低收缩环氧体系固化动力学[J]. 高分子材料科学与工程, 2009, 0(6) |
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| 作者姓名： | 张竞 李全步 蒋英 王晓东 黄培 |
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| 作者单位： | 南京工业大学化学化工学院材料化学工程国家重点实验室; |
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| 摘 要： | 采用非等温DSC法对一种高韧性低收缩环氧树脂体系(E-51/E-20/DAMI)固化动力学进行了研究。分别通过n级反应模型法和自催化模型法得到了固化反应动力学方程。结果表明,n级反应方程与实验值差别较大;而采用Malek判据判别该固化反应按自催化反应机理进行,并通过"单点非模型"拟合法求解动力学参数,模型计算曲线与DSC实验曲线基本吻合。但由于动力学控制和扩散控制竞争关系的改变,随升温速率的提高,实验曲线逐渐偏离模型曲线,体系的总放热焓变小。所确立的模型在5K/min～25K/min的升温速率下能较好地描述E-51/E-20/DAMI体系的固化反应过程。
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| 关 键 词： | 环氧树脂 固化反应 动力学 非等温 差示扫描量热法 |
Nonisothermal Cure Kinetics of a High Toughness and Low Volume Shrinkage Ratio Epoxy System |
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| ZHANG Jing,LI Quan-bu,JIANG Ying,WANG Xiao-dong,HUANG Pei. Nonisothermal Cure Kinetics of a High Toughness and Low Volume Shrinkage Ratio Epoxy System[J]. Polymer Materials Science & Engineering, 2009, 0(6) |
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| Authors: | ZHANG Jing LI Quan-bu JIANG Ying WANG Xiao-dong HUANG Pei |
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| Affiliation: | College of Chemistry and Chemical Engineering;State Key Laboratory of Materials-Oriented Chemical Engineering;Nanjing University of Technology;Nanjing 210009;China |
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| Abstract: | The curing kinetics of a high toughness and low volume shrinkage ratio epoxy system(E-51/E20/DAMI)was studied by differential scanning calorimetry(DSC)under nonisothermal conditions.The data were fitted to n order model and autocatalytic model respectively.The results indicate that n order model deviates significantly from experimental data.Malek's method was used to prove that the curing kinetics of the system concerned follow single-step autocatalytic model,and a "single-point model-free" approach was emp... |
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| Keywords: | epoxy resin curing reaction kinetics nonisothermal DSC |
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