Akademik Veri Yönetim Sistemi
COMPOSITE STRUCTURES, cilt.211, ss.254-263, 2019 (SCI-Expanded)
The scope of this work consists in studying the effects of different processing parameters such as magnetite grinding, magnetite loading amount, type of coating polymer and also sound frequency on the sound insulation property of layered nonwoven structures. Thermal stability and mechanical properties were also investigated. To achieve this goal, nonwoven fabrics were coated with styrene butadiene copolymer latex and ethylene vinyl acetate polymers by using raw and ground magnetite in three different amounts, i.e., 100, 200 and 400 g/m(2). Sound transmission loss measurements were performed on the samples using an impedance tube equipped with four microphones. Independent of the coating polymer, addition of magnetite improved thermal stability and mechanical properties. But, sound insulation property was substantially changed depending on the coating polymer. Magnetite incorporation provided noticeable improvements in the ethylene vinyl acetate coated samples (increment values of 3-16 dB), while the effect of magnetite usage was limited in the latex coated samples (0.1-2.9 dB).