2026-05-05T18:33:15Zhttps://uvadoc.uva.es/oai/requestoai:uvadoc.uva.es:10324/615002023-09-11T19:00:49Zcom_10324_1158com_10324_931com_10324_894col_10324_1242
Lobos, Juan
Thirumuruganandham, Saravana Prakash
Rodríguez Pérez, Miguel Ángel
2023-09-11T07:57:58Z
2023-09-11T07:57:58Z
2022
Polymers, 2022, Vol. 14, Nº. 19, 4082
2073-4360
https://uvadoc.uva.es/handle/10324/61500
10.3390/polym14194082
4082
19
Polymers
14
2073-4360
Producción Científica
LDPE (low-density polyethylene) foams were prepared using the improved compression moulding technique (ICM) with relative densities ranging from 0.3 to 0.7 and with different levels of chemical blowing agents (from 1% to 20%). The density gradients, cellular structure and thermal conductivity of the foams were characterized. The density and amount of CBA used were found to have a significant effect on the cellular structure both at the mesoscale (density gradients) and at the microscale (different cell sizes and cell densities). In addition, the thermal conductivity of the samples is very sensitive to the local structure where the heat flux is located. The technique used to measure this property, the Transient Plane Source method (TPS), makes it possible to detect the presence of density gradients. A simple method for determining these gradients based on thermal conductivity data was developed.
Ministerio de Ciencia e Innovación y Fondo Europeo de Desarrollo Regional (FEDER) - (grants MAT2009-14001-C02-01 andMAT2012-34901)
Junta de Castilla y León - (project VA174A12-2)
Universidad Technologica Indoamérica, Ecuador - (grant 2022–2026, code: INV-0012-042)
application/pdf
eng
MDPI
info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/4.0/
© 2022 The Authors
Atribución 4.0 Internacional
Compression molding
Física de la materia condensada
Plastic foams
Espumas poliméricas
Polymers
Polyethylene
Polietileno - Propiedades térmicas
Thermal conductivity
Calor - Conducción
2206.10 Polímeros
2202.01 Conductividad
Density gradients, cellular structure and thermal conductivity of high-density polyethylene foams by different amounts of chemical blowing agent
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
https://www.mdpi.com/2073-4360/14/19/4082
SI