Soundproofing effect of nano particle reinforced polymer composites

Abstract

In this paper, the effects of soundproofing by polymer and carbon-nanotube (CNT) composites were investigated. The specimens for sound insulation measurement were fabricated with Acrylonitrile Butadiene Styrene (ABS)/CNT composites. Tests showed that sound transmission loss of ABS/CNT 15 vol.% composite was higher by 21.7% (4.1 dB) than that of pure ABS specimen at a frequency of 3400 Hz. It was found that the principal factor influencing the improvement of sound insulations of ABS/CNT composites was increased stiffness by CNT additives. To demonstrate the practical applicability of polymer/CNT composites, tests were conducted for the reduction of operational noise from mechanical relay.

Acoustically and thermally insulating epoxy foams prepared by non‐traditional expandable microspheres

“…Figure b shows the effect of the foaming temperature on the soundproof property of epoxy foams. The sound TL is also enhanced with the incremental frequency according to the Sound‐proof Mass Law, and the highest value of TL always appears at the highest frequency of 2,500 Hz .…”

Sound transmission loss from polyvinyl acetate polymer mixed with different porous carbons

“…Materials like hollow microsphere, porous particle, foam and fiber are ideal for sound insulation applications [1]. A number of studies have been carried out to develop such soundproof materials namely gypsum board on concrete material [4], wood-waste tire rubber composite [5], inorganic particles/polymer composites, including CaCO 3 /polypropylene [1], hollow glass bead/polypropylene [6], carbon nanotube (CNT)/acrylonitrile-butadienestyrene [7], carbon black/acrylonitrile-butadiene-styrene [8]. All these studies suggest that the use of soundproof materials has a bright potential in controlling sound pollution problems.…”

Polymer Nanocomposites in Building, Construction

“…The sound transmission loss (STL) exceeded that of pure PP by about 15-21 dB over 3200-6400 Hz and by 8-14 dB over 580-620 Hz (45). It was also reported that acrylonitrile-butadiene-styrene copolymer (ABS)/CNT nanocomposites at 3400 Hz at 15% vol.CNTs was 21.7% (4.1 dB) higher than for pure ABS (46).…”