碳纤维复合材料界面反应动力学分析

Interfacial reaction kinetics of carbon fiber composite

摘要:

为研究碳纤维表面涂层在制备复合材料过程中是否发生界面反应,采用测量反应焓的方法分析不同升温速率下树脂和固化剂、树脂和上浆剂、上浆剂和固化剂等体系的反应情况．实验结果显示,Kissinger方法、Flynn-Wall-Ozawa方法和Crane方法求得的上浆剂和固化剂的系统活化能为47.25 kJ／mol,而树脂和固化剂的系统的活化能为49.64 kJ／mol．由此表明,碳纤维的表面涂层与固化剂是反应的,且碳纤维表面的涂层优先与固化剂发生反应．

Abstract:

In order to study the interfacial reaction of carbon fiber surface coating in the process of preparing composite materials, an experimental method based on dynamics was adopted. Different DSC curve will be obtained from the reaction enthalpy measurement of resin and curing agent, resin and sizing agent, sizing agent and curing agent and so on with different heating rate. The pre-exponential factor A, reaction order n and apparent activation energy E and dynamics equations were calculated by the Kissinger, Flynn-Wall-Ozawa and Crane methods. The activation energy of the sizing agent and curing agent is 47.25 kJ／mol, while the activation energy of the resin and curing agent system is 49.64 kJ／mol. It can be concluded that the carbon fiber surface coating reacts with curing agent first than the resin.