Polypropylene-lignocellulosic material composites as promising sound absorbing materials

E. Markiewicz; S. Borysiak; D. Paukszta

Published : 2022-08-18

Vol. 54 No. 6 (2009)

Polypropylene-lignocellulosic material composites as promising sound absorbing materials

E. Markiewicz S. Borysiak D. Paukszta

Abstract

Composites made from polypropylene and lignocellulosic materials derived from plants were subjected to acoustic and mechanical investigations. Sound absorption coefficients for these composites were measured using the acoustic standing wave method in the frequency range from 1000 to 6500Hz. This work shows that the frequency dependence of the sound absorption coefficient obtained for pure polypropylene can be modified by proper choice of the filler added to the polypropylene matrix. Fillers derived from hemp plant cause significant increase in the absorption coefficient starting from the frequency above 3000Hz. The fillers obtained from rapeseed straw, beech and flax are recognized to suppress the sound in the frequency range from 3000 to 4000Hz. The investigated composites can be recommended for application in the automotive industry and building as the construction materials absorbing the undesired noise.

Keywords

kompozyty ; napełniacze lignocelulozowe ; współczynnik pochłaniania dźwięku ; absorber dźwięku composites ; lignocellulosic fillers ; sound absorption coefficient ; sound absorbers

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Markiewicz, E., Borysiak, S., & Paukszta, D. (2022). Polypropylene-lignocellulosic material composites as promising sound absorbing materials. Polimery, 54(6), 430–435. Retrieved from https://ichp.vot.pl/index.php/p/article/view/1218

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E. Markiewicz ewamar@ifmpan.poznan.pl

Affiliation
Institute of Molecular Physics, Polish Academy of Sciences, ul. Smoluchowskiego 17, 60-179 Poznań

S. Borysiak

D. Paukszta