Fractal Kinetics of the Solidifying Reaction of Silicate Inorganic Adhesive
Xu Wu Feng, Liu Cheng-lun · Journal of Beijing Union University · 2009
In order to research the mechanisms of solidification of silicate inorganic adhesive,the moisture evaporation law in solidification process of the adhesive and its solidification kinetics was investigated based on the experiment in which the dehydration rate in solidification process was determined.The results show that the change trend of dehydration rate in the whole process can be described with the following equation: x=Akt/[kt+10exp(-kt)],and physical action is in cooperation with chemical reactions in the whole solidification process of the adhesive,but physical reaction is the rate determining step;moreover, the kinetic characteristics of zero order reaction appears in the pre-solidification process of the silicate adhesive,and the fractional order reaction is found in the latter process.The apparent activation energy of the adhesion reaction is 11.882 kJ/mol and 59.191 kJ/mol on corresponding two steps respectively.The adhesion mechanism of the adhesive is also perfected with DLA model and DLCA model in fractal theory.