2024-03-29T14:56:12Zhttps://riubu.ubu.es/oai/requestoai:riubu.ubu.es:10259/49282021-11-10T09:38:26Zcom_10259_4313com_10259_5086com_10259_2604col_10259_4314
Microcellular polymeric foams based on 1‐vinyl‐2‐pyrrolidone and butyl‐acrylate with tuned thermal conductivity
Reglero Ruiz, José A.
Vallejos Calzada, Saúl
Sanjuán Cortázar, Ana María
García García, Félix Clemente
Múgica, Mikel .
Rodríguez Pérez, Miguel Ángel .
García Pérez, José Miguel
foams
porous materials
radical polymerization
thermal properties
Microcellular polymers have been produced by ScCO2 foaming, based on 1-vinyl-2-pyrrolidone (VP) and butyl-acrylate
(BA). Three different copolymers were prepared, varying the compositions of VP and BA, following a simple radical polymerization
process using an UV initiator. The samples a good foaming behavior and also excellent flexibility and handle ability, with expansion
ratios between 1.53 and 1.72, and cell sizes in the microcellular range (below 5 mm). However, it was observed that the gas distribution
and, consequently, the cellular structure inside the polymer foams was highly dependent on the VP and BA proportions, leading
to very different thermal conductivity values, even for similar volume gas fraction values. These results were related to the copolymer
nanostructuration, which seems to have an influence in the final pore structure, thus opening the possibility of designing microcellular
foams with similar macroscopic characteristics but different thermal conductivity values
2018-09-10T07:49:51Z
2019-03-01T03:45:06Z
2018-02
info:eu-repo/semantics/article
0021-8995
http://hdl.handle.net/10259/4928
doi.org/10.1002/app.45872
eng
Journal of Applied Polymer Science. 2018, V. 135, n. 7, art. 45872
https://doi.org/10.1002/app.45872
info:eu-repo/grantAgreement/MINECO/MAT2014–54137-R
info:eu-repo/grantAgreement/JCyL/BU061U16
info:eu-repo/semantics/openAccess
Wiley