SIMULATION OF HEATING OF DISPERSED-FILLED EPOXY COMPOSITES IN A TRAVELING WAVE MICROWAVE CHAMBER
Abstract
Various electrophysical methods are widely used to modify polymer materials, in particular the processing of polymers in a microwave electromagnetic field. In this work, using mathematical modeling in the COMSOL Multiphysics software environment, the maximum heating temperature of a dispersed-filled epoxy polymer, as well as the temperature spread over the volume of the composite, are established. For modeling, dielectric parameters were studied using ED20 grade epoxy resin with various dispersed fillers absorbing microwave energy with their uniform distribution over the entire volume of the binder. To measure the dielectric parameters, a waveguide method with a full filling of the waveguide section was used. When modeling microwave heating of materials, epoxy dispersed-filled polymers were heated in a microwave chamber with a traveling wave at a microwave generator power of 2500 watts at a frequency of 2450 MHz. The maximum heating time of the sample with filler was taken 76 s to ensure the heating rate of the filler of 5 °S/s.
As a result of experimental studies, the electrophysical properties of materials absorbing microwave energy for use as epoxy resin fillers have been determined. The greatest changes in dielectric parameters are observed when filling epoxy resin with graphite, which belongs to semiconductor materials.
As a result of mathematical modeling, the prospects of using absorbing mineral fillers for the intensification of microwave heating have been established. The studied fillers allow to increase the heating temperature of the epoxy binder, thereby having a modifying effect on the composite material. In order to obtain a given temperature distribution in an epoxy composite material, it is further necessary to change the power of a microwave generator in a waveguide-type microwave chamber with varying the heating time of a dispersed-filled epoxy binder.
For citation:
Vasinkina E.Y., Kalganova S.G., Trigorly S.V., Sivak A.S., Yakovlev A.S., Kadykova Yu.A. Simulation of heating of dispersed-filled epoxy composites in a traveling wave Microwave chamber. Ros. Khim. Zh. 2022. V. 66. N 2. P. 16-21. DOI: 10.6060/rcj.2022662.3.
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