RT info:eu-repo/semantics/article
T1 Microcellular foamed aromatic polyamides (aramids). Structure, thermal and mechanical properties
A1 Pascual Portal, Blanca Sol
A1 Trigo López, Miriam
A1 Ramos Rodríguez, Cipriano
A1 Sanz Díez, Mª Teresa
A1 Pablos, Jesús Luis
A1 García García, Félix Clemente
A1 Reglero Ruiz, José Antonio
A1 García Pérez, José Miguel
K1 Aramids
K1 Microcellular
K1 Ionic liquids
K1 ScCO2 foaming
K1 Polyamide
K1 Química orgánica
K1 Chemistry, Organic
K1 Ingeniería química
K1 Chemical engineering
AB 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.
PB Elsevier
SN 0014-3057
YR 2019
FD 2019-01
LK http://hdl.handle.net/10259/5025
UL http://hdl.handle.net/10259/5025
LA eng
NO FEDER (Fondo Europeo de Desarrollo Regional) and the Spanish Agencia Estatal de Investigación (MAT2017-84501-R)
DS Repositorio Institucional de la Universidad de Burgos
RD 23-nov-2024