Abstract
Comparative studies of moisture absorption by cured polymer composite materials (PCM) under conditions of being in a climate chamber for 7 days, previously subjected to short-term exposure to a SHF electromagnetic field with a frequency of 2.45 GHz, have been performed. It has been found that processing with an energy flux density (17-18) x104 mW/cm2 for 2 minutes contributes to a significant decrease in moisture absorption, which is expressed in a decrease in weight change after the presence of carbon fiber and fiberglass prototypes in the chamber compared with control samples by 16.7 and 25%, respectively. The reason for this result, determined on the basis of microstructure analysis, presumably lies in the reduction of the pore size and the increase in the relief of agglomerates, which increases the resistance to liquid penetration. Taking into account the previously established positive effect on improving the strength of PCM processed in a SHF electromagnetic field, the results obtained confirm the feasibility of using this method as a finishing technological operation in the production of PCM products.
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