Epoxy Polymer Based Foam Fillers and Sandwich Structures with a Core Based on Them
摘要
The epoxy compositions are developed for production of foamed plastics and sandwich panels with a core on their basis by the moulding in a closed mould technology with simultaneous foaming. The possibility is shown of obtaining foams with low density (up to 50 kg/m3) with the content of thermo-expanding microspheres from 10 to 45 wt.% due to the technology developed for combining the components of the composition. The influence of microspheres on mechanical characteristics of foams and sandwich panels on their basis is analyzed. The strategy of selection of technological parameters for one-stage foaming and the possibility of creating the necessary moulding pressure due to the introduction of a large content of thermo-expanding microspheres into the composition are presented. The obtained foams have low density, high adhesion to the cladding of sandwich structure, as well as different stiffness depending on the concentration of thermo-expanding microspheres.