复合材料胶接用发泡胶的工艺验证与固化动力学
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1.中国航发北京航空材料研究院,北京 100095;2.中航工业第一飞机设计研究院,西安 710089;3.西安飞机工业(集团)有限公司,西安 710089]

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TQ323.5

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Process Validation and Cure Kinetics of Foam Adhesive for Composite Bonding
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1.AECC Beijing Institute of Aeronautical Materials,Beijing 100095;2.AVIC The First Aircraft Institute,Xi'an 710089;3.AVIC Xi'an Aircraft Industry (Group) Company Ltd.,Xi'an 710089]

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    摘要:

    通过动态差示扫描量热分析(DSC)研究了一种中温固化的发泡胶的固化工艺和固化动力学。为证实DSC 峰值温度Tp与升温速率β的自然对数存在线性关系,在DSC测试中除采用β为5、10、15和20 K/min的升温速率组合外,还特意设定升温速率β为1、2.718、7.389和20 K/min,则lnβ等于或近似为0、1、2、3以便于计算,由此可确定固化工艺参数并快速地估算活化能Ea。结合其他关于热固化、热分解甚至一些高分子材料结晶的文献数据,进一步证实了Tp与lnβ往往存在线性关系。利用上述线性关系所获得的特性温度参数T1和ΔT值,可以解释活化能的大小并快速求解动力学数据。研究结果建立并证实了区别于Kissinger和Ozawa方法的另一种简易而且可靠的反应动力学求解方法,并用数学极限的方法进行推导给出了活化能的解析解。上述简易方法求解热致反应或结晶变化的动力学参数是合理有效的。

    Abstract:

    The curing process and cure kinetics of a moderate-temperature-curing adhesive foam had been investigated by dynamic differential scanning calorimetry (DSC) experiments.To confirm a linear relationship between the peak temperatures (Tp) of DSC curves and the natural logarithm of heating rates(β), in addition to the combination of heating rates β of 5,10,15 and 20 K/min in DSC tests,heating rates β of 1,2.718,7.389 and 20 K/min were designedly set, so that lnβ would be equal and approximate to 0,1,2 and 3 for easy calculation, thus curing parameters and the apparent activation energy (Ea) could be easily and quickly determined. Empirical linear relationships between Tp with lnβ had been sustained by a series of literature data about heating cure, thermal decomposition and crystallization of some polymers. Using the characteristic temperature parameters T1 and ΔT obtained from the above linear relationship, the magnitude of the activation energy (Ea) could be explained and the kinetic data could be quickly solved. The results have established and proved a simple and reliable kinetic solution other than methods by Kissinger and Ozawa. The simple method for solving the kinetic parameters of thermal-induced reaction or crystallization change is reasonable and effective.

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乔海涛,梁滨,李喜民,陈舸,张立国.复合材料胶接用发泡胶的工艺验证与固化动力学[J].宇航材料工艺,2024,54(4):15-22.

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历史
  • 收稿日期:2023-01-31
  • 最后修改日期:2024-06-27
  • 录用日期:2023-07-27
  • 在线发布日期: 2024-09-03
  • 出版日期: 2024-08-31
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