Percolation characteristics of filled polyurethane auxetics

T.M. Shevchuk; M.A. Bordyuk; V.A. Mashchenko; V.P. Kvasnikov; V.V. Krivtsov

doi:10.15330/pcss.23.3.590-596

Authors

T.M. Shevchuk Rivne State University for the Humanities, Rivne, Ukraine
M.A. Bordyuk Rivne Medical Academy, Rivne, Ukraine
V.A. Mashchenko National University of Water and Environmental Engineering; Scientific and manufacturing company “PRODECOLOGIA”, Rivne, Ukraine
V.P. Kvasnikov National Aviation University, Kyiv, Ukraine
V.V. Krivtsov Rivne State University for the Humanities, Rivne, Ukraine

DOI:

https://doi.org/10.15330/pcss.23.3.590-596

Keywords:

polymer auxetic, Poisson's ratio, fractal, critical percolation indices, percolation cluster, coordination number, macrolattice

Abstract

According to the experimental values of the propagation velocities of longitudinal and transverse ultrasonic waves, the Poisson's ratio of polyurethane systems filled with metal particles was determined. For such systems, the Poisson's ratio is negative. Its value for metal-filled polymer auxetics with polyurethane matrix allowed to determine fractal dimensions and critical percolation indices. This approach made it possible to clarify the features of structure formation in polymer auxetics. It is shown that the fractal-percolation characteristics of these systems are determined by the type of metal filler and the size of its particles.

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