Archives of Acoustics, 16, 3-4, pp. 451-460, 1991

Sound velocity and loss factor of polyurethane composites. Part II.

W. Bandera
Laboratory of Applied Acoustics and Spectroscopy Gdańsk University, 80-952 Gdańsk, ul. Wita Stwosza 57
Poland

K. Pawlaczyk
Institute of Chemical TechnologyTechnical University of Szczecin, 70-322 Szczecin, ul. Pułaskiego 10
Poland

Elastic, non-foamed polyurethane compositions to be used as vibro-insulating materials have been developed. The compositions were prepared using poly(propylenoethers) of different molecular weights, toluyene diisocyanate and aluminum hydrate as the filling agent. The effect of the composition contents on viscoelastic properties that is, on sound velocity and loss factor has been determined. It has been found that various types of the filler permit to modify properties of composite and especially its stiffness and internal damping.
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