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Influences of rice hull in polyurethane foam on its sound absorption characteristics
Author(s) -
Wang Yonghua,
Zhang Chengchun,
Ren Luquan,
Ichchou Mohamed,
Galland MarieAnnick,
Bareille Olivier
Publication year - 2013
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.22590
Subject(s) - materials science , noise reduction coefficient , polyurethane , hull , composite material , absorption (acoustics) , acoustic impedance , reflection (computer programming) , attenuated total reflection , attenuation coefficient , sound transmission class , fourier transform infrared spectroscopy , acoustics , ultrasonic sensor , optics , porosity , physics , computer science , programming language
In this article, rice hull (RH) was used in the moulding of polyurethane (PU) foam system. The article analyzed the participation of RH in the chemical reaction of PU synthesis with Attenuated Total Reflection‐Fourier Transform Infrared spectroscopy method. Besides, the influence of RH on the formation of pore structure along with the acoustic performance such as sound impedance rate, acoustic reflection factor, sound absorption coefficient, and transmission loss of the products were studied with the Transfer Function Method. The results indicated that RH significantly influenced the uniformity of pore diameter in PU foam. As the content of RH increased, the sound absorption peak shifted toward lower frequency region. And the sound absorption coefficients increased till a threshold value of RH content. POLYM. COMPOS., 34:1847–1855, 2013. © 2013 Society of Plastics Engineers