2024-03-28T10:04:25Zhttps://uvadoc.uva.es/oai/requestoai:uvadoc.uva.es:10324/558752022-10-19T19:00:38Zcom_10324_1158com_10324_931com_10324_894col_10324_1242
Sánchez Calderón, Ismael
Bernardo García, Victoria
Cuadra Rodríguez, Daniel
Martín de León, Judit
Rodríguez Pérez, Miguel Ángel
2022-10-07T08:33:10Z
2022-10-07T08:33:10Z
2022
Polymer, 2022, vol. 261, 125397
0032-3861
https://uvadoc.uva.es/handle/10324/55875
10.1016/j.polymer.2022.125397
Producción Científica
This work shows a route to reduce the thermal conductivity of nanocellular poly(methyl-methacrylate) (PMMA). This approach is based on micronizing to replace the continuous solid phase by a discontinuous one. PMMA powders with densities of 147–195 kg/m3, formed by particles of 100 microns with nanometric cells inside them, are produced by milling. Micronization allows increasing the overall porosity maintaining the cell size. Results prove that after milling it is possible to obtain open cell nanoporous PMMA powders with thermal conductivity below that of the bulk materials (15% reduction). The reduction is not only due to a density decrease, but a result of the new structure of the powder material. The discontinuity of the solid phase and the increase in radiation extinction are the key factors allowing this improvement. This route is confirmed as a promising alternative to enhance the performance of nanocellular polymers.
Junta de Castilla y Leon (grant VA202P20)
Ministerio de Ciencia, Innovación y Universidades (projects RTI2018-098749-B-I00, PTQ2019-010560 and PRE2019-088820)
Instituto para la Competitividad Empresarial de Castilla y León - Fondo Europeo de Desarrollo Regional (projects PAVIPEX. 04/18/VA/008 and FICACEL. 11/20/VA/0001)
application/pdf
eng
Elsevier
info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-nd/4.0/
© 2022 The Authors
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Thermal conductivity
Conductividad térmica
Poly(methyl-methacrylate)
Polimetilmetacrilato
Nanocellular polymers
Polímeros nanocelulares
Micronization as a solution for enhancing the thermal insulation of nanocellular poly(methyl-methacrylate) (PMMA)
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
https://www.sciencedirect.com/science/article/pii/S0032386122008850?via%3Dihub
SI