Curing kinetics of arylamine-based polyfunctional benzoxazine resins by dynamic differential scanning calorimetry
Curing kinetics of arylamine-based polyfunctional benzoxazine resins by dynamic differential scanning calorimetry
复制标题
DOI：
10.1016/j.tca.2006.05.008
复制
发表时间：
2006-08-15
影响因子：
3.5
通讯作者：
Rimdusit, Sarawut
中科院分区：
文献类型：
--
作者：
Jubsilp, Chanchira;Damrongsakkul, Siriporn;Rimdusit, Sarawut
本文研究了以苯胺和3，5-二甲基苯胺为基的多官能苯并恶嗪树脂（BA-a和BA-35x）的固化动力学。采用不同升温速率下的非等温差示扫描量热法（DSC）测定了芳胺型多官能苯并恶嗪树脂固化过程的动力学参数，提出了芳胺型多官能苯并恶嗪树脂固化过程的动力学模型。Kissinger、Ozawa、Friedman和Flynn-Wall-Ozawa方法用于确定固化反应的动力学参数。BA-a树脂只有一个主要的自催化固化过程，平均活化能为81 - 85 kJ mol（-1），而BA-35x树脂有两个主要的固化过程，固化过程明显分裂。低温固化（反应（1））和高温固化（反应（2））的平均活化能分别为81 - 87和111 - 113 kJ mol（-1）。发现反应（1）本质上是自催化的，而反应（2）表现出n级固化动力学。此外，从我们的动力学模型的预测曲线拟合良好的非等温DSC热图。(C)2006 Elsevier B.V.保留所有权利。
In this study, the curing kinetics of polyfunctional benzoxazine resins based on arylamine, i.e. aniline and 3,5-xylidine, designated as BA-a and BA-35x, respectively, were investigated. Non-isothermal differential scanning calorimetry (DSC) at different heating rates is used to determine the kinetic parameters and the kinetic models of the curing processes of the arylamine-based polyfunctional benzoxazine resins were proposed. Kissinger, Ozawa, Friedman, and Flynn-Wall-Ozawa methods were utilized to determine the kinetic parameters of the curing reaction. BA-a resin shows only one dominant autocatalytic curing process with the average activation energy of 81-85 kJ mol(-1), whereas BA-35x exhibits two dominant curing processes signified by the clear split of the curing exotherms. The average activation energies of low-temperature curing (reaction (1)) and high-temperature curing (reaction (2)) were found to be 81-87 and 111-113 kJ mol(-1), respectively. The reaction (1) is found to be autocatalytic in nature, while the reaction (2) exhibits nth-order curing kinetics. In addition, the predicted curves from our kinetic models fit well with the non-isothermal DSC thermogram. (C) 2006 Elsevier B.V. All rights reserved.