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Article

Cyclic Gas Dissolution Foaming as an Approach for Simultaneously Reducing Cell Size and Relative Density in Nanocellular PMMA

1
Cellular Materials Laboratory (CellMat), Condensed Matter Physics Department, University of Valladolid, 47011 Valladolid, Spain
2
CellMat Technologies S.L. Paseo de Belén 9A, 47011 Valladolid, Spain
*
Author to whom correspondence should be addressed.
Academic Editor: Emanoil Linul
Polymers 2021, 13(14), 2383; https://doi.org/10.3390/polym13142383
Received: 15 June 2021 / Revised: 13 July 2021 / Accepted: 18 July 2021 / Published: 20 July 2021
(This article belongs to the Special Issue Advanced Cellular Polymers)
A new approach to produce nanocellular polymers combining small cell sizes with low relative densities is presented herein. This production method, based on gas dissolution foaming, consists of performing a double saturation and foaming cycle. Thus, nanocellular polymethylmethacrylate (PMMA) has been produced through a first saturation at different saturation conditions (6, 10, and 20 MPa and −32 °C), at constant foaming conditions (60 °C for 1 min). Then, the nanocellular PMMAs obtained from the previous step were again saturated at different saturation conditions, 10 MPa 24 °C, 31 MPa 24 °C, 35 MPa 22 °C, and 6 MPa −15 °C and foamed at different temperatures (40, 80 and 100 °C) for 1 min. This new approach allows the cells created in the first saturation and foaming cycle to further grow in the second cycle. This fact permits producing nanocellular polymethylmethacrylate sheets combining, for the first time in the literature, cell sizes of 24 nm with relative densities of 0.3. View Full-Text
Keywords: low-density nanocellular foam; gas dissolution foaming; PMMA; advanced cellular material low-density nanocellular foam; gas dissolution foaming; PMMA; advanced cellular material
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MDPI and ACS Style

Martín-de León, J.; Bernardo, V.; Rodriguez-Perez, M.Á. Cyclic Gas Dissolution Foaming as an Approach for Simultaneously Reducing Cell Size and Relative Density in Nanocellular PMMA. Polymers 2021, 13, 2383. https://doi.org/10.3390/polym13142383

AMA Style

Martín-de León J, Bernardo V, Rodriguez-Perez MÁ. Cyclic Gas Dissolution Foaming as an Approach for Simultaneously Reducing Cell Size and Relative Density in Nanocellular PMMA. Polymers. 2021; 13(14):2383. https://doi.org/10.3390/polym13142383

Chicago/Turabian Style

Martín-de León, Judith, Victoria Bernardo, and Miguel Ángel Rodriguez-Perez. 2021. "Cyclic Gas Dissolution Foaming as an Approach for Simultaneously Reducing Cell Size and Relative Density in Nanocellular PMMA" Polymers 13, no. 14: 2383. https://doi.org/10.3390/polym13142383

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