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Prediction of hydrostatic strength of spheroplastics

In this work, calculations of the hydrostatic strength of a spheroplastic are carried out using the previously described empirical formula. The calculations were based on the physical and mechanical characteristics of the polymer binder and hollow glass microspheres. Measurements of the physical and mechanical characteristics of the polymer binder, hollow glass microspheres and spheroplastics were performed with standard methods: dynamic mechanical analysis (DMA), gas and hydrostatic pycnometers. The results of tensometric tests of Poisson’s ratios of binders were also used. The hydrostatic strength measurements were carried out in a high pressure hydrochamber. Comparison of the calculations and experimental data for a number of spheroplastic compositions based on multicomponent epoxy binders is carried out. The degree of influence of the properties of microspheres and binders on the hydrostatic strength of a spheroplastic is shown. The correlation of the calculated values with experimental knowledge is assessed.