2026-10-11T20:58:44Zhttps://riubu.ubu.es/oai/requestoai:riubu.ubu.es:10259/50252022-05-20T13:22:29Zcom_10259_4313com_10259_5086com_10259_2604com_10259_4244col_10259_4314col_10259_4245
Repositorio Institucional de la Universidad de Burgos
author
Pascual Portal, Blanca Sol
author
Trigo López, Miriam
author
Ramos Rodríguez, Cipriano
author
Sanz Díez, Mª Teresa
author
Pablos, Jesús Luis
author
García García, Félix Clemente
author
Reglero Ruiz, José A.
author
García Pérez, José Miguel
2018-11-28T09:18:14Z
2019-01
0014-3057
http://hdl.handle.net/10259/5025
10.1016/j.eurpolymj.2018.11.007
We have deeply diminished the density of high performance aromatic polyamides or aramids. Thus, we have prepared microcellular films that at the same time maintain the outstanding thermal and mechanical properties characteristic of these high performance materials. Two different cellular aramids were produced, based on commercial poly(m-phenylene isophthalamide), one of them with an additional azide group. Microcellular structures have been obtained by adding ionic liquids combined to ScCO2 foaming process, with cell sizes between 0.6 and 4.7 µm and cell densities between 109 and 1011 cells cm3. The density was lowered for the commercial poly(m-phenylene isophthalamide) (Nomex® and Teijin Conex®) from 1.43 to 0.62 g cm−3 and from 1.48 to 0.31 g cm3 for the aramid containing the azide group. Foams present the following thermal and mechanical properties: 5% weight loss observed at T > 400 °C and relative Young modulus and tensile strength of 1.2 GPa (g cm−3)−1 and 60 MPa (g cm−3)−1, respectively.
eng
Attribution-NonCommercial-NoDerivatives 4.0 International
Aramids
Microcellular
Ionic liquids
ScCO2 foaming
Polyamide
Microcellular foamed aromatic polyamides (aramids). Structure, thermal and mechanical properties
info:eu-repo/semantics/article
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URL
https://riubu.ubu.es/bitstream/10259/5025/1/Pascual_epj_2019-microcellular.pdf
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https://riubu.ubu.es/bitstream/10259/5025/6/Pascual_epj_2019.pdf.txt
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