2026-04-29T08:27:49Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/50252022-05-20T13:22:29Zcom_10259_4313com_10259_5086com_10259_2604com_10259_4244col_10259_4314col_10259_4245

Pascual Portal, Blanca Sol 418 500 Trigo López, Miriam 556 500 0000-0001-5948-1230 Ramos Rodríguez, Cipriano 464 500 Sanz Díez, Mª Teresa 530 500 Pablos, Jesús Luis ace6696a-c30a-409d-a4ce-1f48eda8f1ab 500 García García, Félix Clemente 201 500 Reglero Ruiz, José A. 468 500 García Pérez, José Miguel 213 500 2018-11-28T09:18:14Z 2019-01 2021-02 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. FEDER (Fondo Europeo de Desarrollo Regional) and the Spanish Agencia Estatal de Investigación (MAT2017-84501-R) application/pdf eng Elsevier European Polymer Journal. 2019, V. 110, p. 9-13 https://doi.org/10.1016/j.eurpolymj.2018.11.007 info:eu-repo/grantAgreement/MICINN/MAT2017-84501-R Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess Aramids Microcellular Ionic liquids ScCO2 foaming Polyamide Química orgánica Ingeniería química Chemistry, Organic Chemical engineering Microcellular foamed aromatic polyamides (aramids). Structure, thermal and mechanical properties info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion CC-LICENSE license_rdf license_rdf application/rdf+xml; charset=utf-8 805 https://riubu.ubu.es/bitstream/10259/5025/8/license_rdf 4460e5956bc1d1639be9ae6146a50347 MD5 8 THUMBNAIL Pascual_epj_2019.pdf.jpg Pascual_epj_2019.pdf.jpg IM Thumbnail image/jpeg 4322 https://riubu.ubu.es/bitstream/10259/5025/7/Pascual_epj_2019.pdf.jpg f199cd0642a60c08f5ec0bc82b5a65e0 MD5 7 Pascual_epj_2019-microcellular.pdf.jpg Pascual_epj_2019-microcellular.pdf.jpg IM Thumbnail image/jpeg 4322 https://riubu.ubu.es/bitstream/10259/5025/9/Pascual_epj_2019-microcellular.pdf.jpg f199cd0642a60c08f5ec0bc82b5a65e0 MD5 9 ORIGINAL Pascual_epj_2019-microcellular.pdf Pascual_epj_2019-microcellular.pdf application/pdf 847648 https://riubu.ubu.es/bitstream/10259/5025/1/Pascual_epj_2019-microcellular.pdf 361f7aece2348fc5a838238254a0316a MD5 1 LICENSE license.txt license.txt text/plain; charset=utf-8 998 https://riubu.ubu.es/bitstream/10259/5025/5/license.txt aa90105e1c90a1b4fe810649aa967b7d MD5 5 TEXT Pascual_epj_2019.pdf.txt Pascual_epj_2019.pdf.txt Extracted text text/plain 25442 https://riubu.ubu.es/bitstream/10259/5025/6/Pascual_epj_2019.pdf.txt c8ee0d767d291579ba8d19c2e715a17c MD5 6 10259/5025 oai:riubu.ubu.es:10259/5025 2022-05-20 15:22:29.997 Repositorio Institucional de la Universidad de Burgos bubrep@ubu.es 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