炭黑对环氧树脂复合材料的非等温固化动力学的影响

The Effect of Carbon Black on the Non-isothermal Curing Kinetics of Epoxy Resin Composites

本研究运用非等温固化动力学探究炭黑对环氧树脂/DDM复合材料固化的影响。将混有不同质量分数炭黑的环氧树脂/DDM在DSC热分析仪里分别在5、10、20、40℃/min的升温速率下发生固化,采集加热过程中的热焓值变化数据。分别运用Kissinger方程和Coat-Redfern方程对得到的数据进行处理,得到固化反应的活化能。分析结果表明:炭黑对环氧树脂的固化起阻碍作用,这种阻碍作用在炭黑质量分数为3%时最大;CB/环氧树脂复合体系的活化能随着转化率的增大先下降再上升。

This study uses non-isothermal curing kinetics to explore the effect of carbon black on the curing of epoxy resin/DDM composites.The epoxy resin/DDM mixed with different mass fractions of carbon black was cured in a DSC thermal analyzer at heating rates of 5,10,20,and 40℃/min,and the enthalpy value change data during the heating process was collected.The Kissinger equation and the Coat-Redfern equation were used to process the obtained data to obtain the activation energy of the curing reaction.The analysis results show that carbon black hinders the curing of epoxy resin.This hindrance is greatest when the mass fraction of carbon black is 3%;The activation energy of the CB/epoxy resin composite system first decreases and then increases with the increase of the conversion rate.