RT info:eu-repo/semantics/article
T1 A new methodology based on cell-wall hole analysis for the structure-acoustic absorption correlation on polyurethane foams
A1 Merillas Valero, Beatriz
A1 Villafañe González, Fernando
A1 Rodríguez Pérez, Miguel Ángel
K1 Acoustics
K1 Sound absorption
K1 Aislamiento acústico
K1 Cellular structure
K1 Plastic foams
K1 Espumas poliméricas
K1 Polymers
K1 Polimeros y polimerizacion
K1 Polyurethane foam
K1 Espumas poliméricas de poliuretano - Propiedade mecánicas
K1 2201 Acústica
K1 2206.10 Polímeros
K1 2304.21 Poliuretanos
AB Polyurethane foams with a hybrid structure between closed cell and open cell were fabricated and fully characterized. Sound absorption measurements were carried out in order to assess their acoustic performance at different frequency ranges. The cellular structure of these systems was studied in detail by defining some novel structural parameters that characterize the cell wall openings such as the average surface of holes (Sh), the number of holes (h), and the area percentage thereof (%HCW). Therefore, these parameters allow to analyze quantitatively the effect of different structural factors on the acoustic absorption performance. It has been found that the parameters under study have a remarkable influence on the normalized acoustic absorption coefficient at different frequency ranges. In particular, it has been demonstrated that increasing the surface of the holes and the percentage of holes in the cell walls allows increasing the acoustic absorption of these types of foams, a promising statement for developing highly efficient acoustic insulators. Additionally, we could determine that a suitable minimum value of hole surface to reach the highest sound dissipation for these samples exists.
PB MDPI
SN 2073-4360
YR 2022
FD 2022
LK https://uvadoc.uva.es/handle/10324/62638
UL https://uvadoc.uva.es/handle/10324/62638
LA eng
NO Polymers, 2022, Vol. 14, Nº. 9, 1807
NO Producción Científica
DS UVaDOC
RD 18-nov-2024