Sound-Absorbing Polymer Composite Materials for Construction Purposes

Abstract

The paper presents the results of a study of the influence of the nature fillers (wood flour, wood dust, vermiculite, expanded vermiculite, organoclay) and a polymer matrix (elastomer and thermoplastic) on the sound-absorbing and physico-mechanical characteristics of polymer composite materials. As a result of the studies, it was shown that sound absorption depends on the polymer matrix used - the sound absorption coefficient in the frequency range 2500-5000 Hz is greater for an elastomer-based composite material. It was also found that the nature of the studied fillers, as well as their content, practically does not affect the level of sound absorption of the polymer composite material. Differences appear only at a frequency of 6300 Hz. At high frequencies, expanded vermiculite has shown itself to be the most effective filler in terms of improving sound insulation properties. In the case of using, as a polymer-based thermoplastic, the introduction of a filler does not affect the values of the sound absorption coefficient in the entire frequency range.