RELATIONSHIP OF STRUCTURAL CHARACTERISTICS AND MODULUS OF ELASTICITY OF DISPERSED-FILLED POLYMER COMPOSITES BASED ON ULTRA-HIGH MOLECULAR POLYETHYLENE

The article is devoted to the current problem of creating composite materials with improved performance characteristics. An effective way to solve this problem is to polymerize the polymer material with disperse fillers, i.e. to introduce the filler during polymer synthesis. It is noted that the interfacial interaction of filler and polymer plays a decisive role in this. The object of the study is supermolecular polyethylene, and the filler is dispersed particles of aluminium and bauxite. Structural and mechanical methods investigated the effect of the degree of filling on the modulus of elasticity and the degree of crystal personality of supermolecular polyethylene. The filling efficiency for the tested supermolecular polyethylene composites was evaluated in operation using the efficiency factor of the modulus. It is obtained that the coefficient of efficiency of the elastic modulus is much higher in the case of a low molecular weight filler (bauxite). This indicates that classic models are not applicable to describe the behavior of such materials. The results of the studies show that the value of the coefficient of efficiency of the modulus of elasticity is determined by the structure obtained during solid-phase extrusion, namely, the degree of orientation that is characteristic of oriented polymer materials and the strength of the phase boundaries between the polymer and the filler, which is a specific factor for dispersed-filled polymer composites.