The fly ash was modified by self-made surface modifier and commercial silane coupling agent.The modified product was tested by infrared spectroscopy and thermogravimetric analysis.Then the product was filled into epoxy resin(EP)/low molecular weight polyamide(PA),which composed a kind of compound binder used in building.The effect of curing temperature,kind and content of modified fly ash with different modifiers on curing kinetics of the composite materials were studied.As well,the effect of temperature on curing kinetics was studied.It was found that in the curing reaction of EP compound binder modified fly ash played an obvious catalytic role,which increased with the increasing of the modified fly ash content.However,when the content reached 30 phr,the viscosity of the system increased remarkably,leading to the conversion of the reaction from chemical controlled to diffusion-controlled type at a certain curing degree.The conversion hindered the further curing reaction and reduced the curing degree.The reduction of temperature can also reduce the autocatalytic action,which reflected by significantly decrease of the reaction order.Reducing the temperature leaded the curing reaction changing from chemical control to diffusion control at earlier curing reaction degree.
Liu Yanbing, Liu Fuyong, Qiao Zhaoyu, Shang Renjie
. Investigation of the curing kinetics of EP compound binder filled with modified fly ash[J]. New Chemical Materials, 2020
, 48(10)
: 180
-185
.
DOI: 10.19817/j.cnki.issn 1006-3536.2020.10.039
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