Abstract
Various aspects of the application of low-frequency ultrasound with the aim of achieving energy saving in the molding of reactoplastic polymer composite materials are analyzed. The efficiency of ultrasonic technology in the molding of traditional and nanomodified polymers on an epoxy matrix is considered. Features of the origin and development of ultrasonic cavitation in liquid epoxy binders are described. The main parameters of ultrasonic treatment are discussed. The experimental cyclograms of hardening of epoxy binding of “cold” and “hot” curing used in the manufacture of reinforced plastics and obtained without and with ultrasonic treatment are analyzed. The improved designs of the impregnation, dosing and winding units, which are used on the serial impregnating and drying equipment intended for the preparation of prepregs, are considered. An improvement in the structure of cured reinforced composites obtained without and with ultrasonic treatment is established by conducting a comparative analysis of the electron microscopic examination of their microsections and the places of destruction.