Abstract
Methods of direct and indirect assessment of the quality of mixing dispersed solid-phase components in a liquid polymer binder are considered. It is shown that a number of methods for the quantitative estimation of mixing (associated with the extraction of solid-phase components), which have been developed in other areas of the technology of materials, are not suitable for controlling an energy-saturated heterogeneous composite material (EHCM). An experimental method revealed the criteria values (a range) of the EHCM density and determined the main groups of the EHCM characteristics, ensuring their acceptable operational properties. By means of modern research equipment using proven methods, a series of studies was carried out to establish the uniformity of the distribution of particles of solid-phase components in the EHCM, the presence, the shape, sizes and distribution in the volume of defects in the structure of the material, the physicomechanical properties of the EHCM after polymerization. According to a comparison of the results of instrumental determination of the main characteristics of the EHCM (structural, physical) with the operational properties of the material, depending on the duration of the mixing process on a specific equipment under otherwise equal conditions, it was found that for the successful solution of technological tasks it is acceptable to assess indirectly the quality of mixing according to the results of density determination of the EHCM after its polymerization. This can provide operational output quality control of the final product that does not require significant material and time costs during the development of technological processes and during the production of the EHCM.
Highlights
Energy-saturated heterogeneous composite materials (EHCMs), used as an energy source in technical systems operating on jet thrust, are produced by mixing polydisperse particles of solid-phase components in one or more liquid-phase binders
Taking into account the results obtained in the course of the study, it was shown that the density of EHCM is the most representative property characterizing the quality of mixing of its components and the formation of an ordered structure
The paper defines the main properties of EHCM, which characterize the mixing quality of its components
Summary
Energy-saturated heterogeneous composite materials (EHCMs), used as an energy source in technical systems operating on jet thrust, are produced by mixing polydisperse particles of solid-phase components in one or more liquid-phase binders. [1], the characteristics were investigated and evaluation criteria were proposed that determine the degree of their fulfillment These characteristics include: the degree of uniformity of particle distribution of solid-phase components in EHCM; absence/presence of cavities in the EHCM product, their sizes, shapes and volume distribution; the density of the resulting EHCM; physical and mechanical properties of EHCM after polymerization. Their measurement is carried out taking into account the physicochemical properties of the components and EHCM as a whole, typical for each stage of the technological process of its production. Production technology of the experimental composition, due to the presence of nanoscale antioxidant powders in the composition of solid-phase components, assumed the production of EHCM in two stages
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More From: Proceedings of the National Academy of Sciences of Belarus, Physical-Technical Series
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