关键词: 环氧树脂, 活化纳米氧化铝, 固化动力学, 等转化率法

Abstract:

Nanoaluminum was subjected to surface activation using sodium hydroxide(NaOH)solution.In order to introduce epoxy group onto the surface of nanoaluminum, γglycidoxypropy1 trimethoxysilane(KH560)and EP resin were used for surface treatment after the activation process.The effect of activated nanoaluminum and epoxy functionalized nanoaluminum on the mechanism and kinetic parameters of curing reaction of epoxy resin were studied by means of nonisothermal differential scanning calorimetry(DSC).The relationship between activation energy and conversion of the curing reaction was determined by using the isoconversional methods of Friedman and KAS, and the kinetics parameters were also obtained by using Kissinger equation.The results showed that the existence of activated nanoaluminum and epoxy functionalized nanoaluminum increased the rate constant and decreased gelling temperature.The addition of activated nanoaluminum and epoxy functionalized nanoaluminum increased activation energy and dealing temperature.When 2% KH560 modified nanoaluminum was used, gelling temperature decreased 6.5℃, and dealing temperature increased 17.5℃, but has no obvious effect on the order of reaction and did not change the overall curing reaction mechanism.

Key words: 环氧树脂, 活化纳米氧化铝, 固化动力学, 等转化率法