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Título
A new methodology based on cell-wall hole analysis for the structure-acoustic absorption correlation on polyurethane foams
Año del Documento
2022
Editorial
MDPI
Descripción
Producción Científica
Documento Fuente
Polymers, 2022, Vol. 14, Nº. 9, 1807
Résumé
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.
Materias (normalizadas)
Acoustics
Sound absorption
Aislamiento acústico
Cellular structure
Plastic foams
Espumas poliméricas
Polymers
Polimeros y polimerizacion
Polyurethane foam
Espumas poliméricas de poliuretano - Propiedade mecánicas
Materias Unesco
2201 Acústica
2206.10 Polímeros
2304.21 Poliuretanos
ISSN
2073-4360
Revisión por pares
SI
Patrocinador
Ministerio de Ciencia, Innovación y Universidades - (grant FPU17/03299)
Junta de Castilla y León - (Grant VA202P20)
Ministerio de Ciencia, Innovación y Universidades - (project RTI2018-098749-B-I00)
Junta de Castilla y León, Ente Público Regional de la Energía de Castilla y León - (EREN_2019_L4_UVA)
Junta de Castilla y León - (Grant VA202P20)
Ministerio de Ciencia, Innovación y Universidades - (project RTI2018-098749-B-I00)
Junta de Castilla y León, Ente Público Regional de la Energía de Castilla y León - (EREN_2019_L4_UVA)
Version del Editor
Propietario de los Derechos
© 2022 The Authors
Idioma
eng
Tipo de versión
info:eu-repo/semantics/publishedVersion
Derechos
openAccess
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