To work out effective damping materials it is necessary to perfect analytical dependences linking dynamic properties of a composite with its structure-forming parameters. The analytical model of the particulate-filled polymers, based on the method of strain energy, convenient for engineering use and allowing to predict damping properties of a composite more reliable is given in this article. The detailed leading-out of formulas for scaling of a bulk modulus and loss factor of both two-phase and three-phase model of a composite is presented. Comparison of numerical values of damping characteristics under the derived formulas with experimental researches show that the offered model allows not only to show a qualitative pattern of dependence of dynamic behavior of a composite from degree of admission, but also to receive comprehensible quantitative results.
Results of scientific researches in the field of creation of self-adhesive radiation shielding materials on the basis of polymers are presented in this article. It is stated, that radiation shielding coverings on the basis of ethylene propylene rubber are more preferable than coverings on the basis of BSR and SBS. Materials on the basis of ethylene propylene rubber possess high hardness at scaling from metal (more than 600 N/m) and hardness at breakoff from concrete (more than 0,1 MPa), have a high linear absorption coefficient.
The article deals with the problem of creating vibration damping polymeric materials with high damping properties in a wide temperature range. The purpose of the article is to study physical-mechanical properties of composites based on ethylene-vinyl acetate by adding various modifiers in the form of resins. The main method to investigate this problem is the method of dynamic mechanical analysis, which makes possible to obtain viscoelastic properties of polymeric materials under the influence of an oscillating load at various temperatures and oscillation frequencies. Due to the established experimental dependencies, the authors have determined the type of resin, which improves the damping properties and increases the stiffness of the composites based on ethylene-vinyl acetate. Moreover, the authors have defined the limit of working capacity of composites with resins at negative temperatures.
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