RT info:eu-repo/semantics/article
T1 Micronization as a solution for enhancing the thermal insulation of nanocellular poly(methyl-methacrylate) (PMMA)
A1 Sánchez Calderón, Ismael
A1 Bernardo García, Victoria
A1 Cuadra Rodríguez, Daniel
A1 Martín de León, Judit
A1 Rodríguez Pérez, Miguel Ángel
K1 Thermal conductivity
K1 Conductividad térmica
K1 Poly(methyl-methacrylate)
K1 Polimetilmetacrilato
K1 Nanocellular polymers
K1 Polímeros nanocelulares
AB 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.
PB Elsevier
SN 0032-3861
YR 2022
FD 2022
LK https://uvadoc.uva.es/handle/10324/55875
UL https://uvadoc.uva.es/handle/10324/55875
LA eng
NO Polymer, 2022, vol. 261, 125397
NO Producción Científica
DS UVaDOC
RD 24-abr-2024