首页 | 本学科首页   官方微博 | 高级检索  
     

酚醛树脂固化的非模型拟合动力学研究
引用本文:叶晓川,曾黎明,张超,陈雷. 酚醛树脂固化的非模型拟合动力学研究[J]. 武汉理工大学学报, 2012, 34(1): 36-40
作者姓名:叶晓川  曾黎明  张超  陈雷
作者单位:武汉理工大学材料科学与工程学院,武汉,430070
摘    要:根据不等温差示扫描量热曲线,采用非模型拟合动力学法对酚醛树脂的固化动力学进行了研究。基于Fried-man,Flynn-Wall-Ozawa和Kissinger-Akahira-Sunose 3种模型计算得到了固化速率及活化能与固化度的关系,进而对此树脂体系的固化反应阶段及固化行为进行了分析,并对等温固化行为进行预测。结果表明,固化反应逐渐从自催化反应机理转变为n阶反应机理,与模型拟合法研究的结果基本吻合。对Friedman,Flynn-Wall-Ozawa,Kissinger-Akahira-Sunose 3种动力学方法进行比较发现,3种方法都显示了较好的拟合结果。其中,Flynn-Wall-Ozawa和Kissinger-Aka-hira-Sunose两种方法的结果十分接近,并能对固化行为进行准确地反映。

关 键 词:非模型动力学  酚醛  固化行为  活化能  等温实验

Model-free Kinetic Study of Phenol Formaldehyde Resin Cure
YE Xiao-chuan , ZENG Li-ming , ZHANG Chao , CHEN Lei. Model-free Kinetic Study of Phenol Formaldehyde Resin Cure[J]. Journal of Wuhan University of Technology, 2012, 34(1): 36-40
Authors:YE Xiao-chuan    ZENG Li-ming    ZHANG Chao    CHEN Lei
Affiliation:(School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China)
Abstract:The curing behavior of novolac type phenolic resin was studied through differential scanning calorimetry(DSC) using model-free(isoconversion) kinetic methods.In the model-free kinetic study,Friedman,Flynn-Wall-Ozawa,and Kissinger-Akahira-Sunose methods were used to calculate the curing activation energy.The dependence curve of activation energy on conversion and the piecewise model fitting results both displayed a change in the kinetic reaction mechanism from the autocatalytic to n-order regime.According to the isothermal prediction results,the model-free kinetic methods show excellent prediction ability.Also,Flynn-Wall-Ozawa and Kissinger-Akahira-Sunose methods were found to show similar results in analyzing the curing behavior of this novolac resin.
Keywords:model-free kinetic  phenol formaldehyde  curing behavior  activation energy  isothermal experiment
本文献已被 CNKI 万方数据 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号