TY - JOUR
T1 - Study of the mechanical, electrical and morphological properties of PU/MWCNT composites obtained by two different processing routes
AU - Fernández-d'Arlas, Borja
AU - Khan, Umar
AU - Rueda, Lorena
AU - Martin, Loli
AU - Ramos, Jose A.
AU - Coleman, Jonathan N.
AU - González, Maria L.
AU - Valea, Angel
AU - Mondragon, Iñaki
AU - Corcuera, Maria A.
AU - Eceiza, Arantxa
PY - 2012/1/18
Y1 - 2012/1/18
N2 - A comparative study of the influence of processing route on polyurethanes (PUs)/multiwalled carbon nanotube (MWCNT) composites mechanical and electrical properties and also morphology was undergone employing two differentiated processing methods, solvent casting and buckypaper infiltration, for producing PU composites with low, medium and high mass fractions of acid treated MWCNT, and with no covalent linkages between the matrix and the nanotubes. As for example, with a MWCNT mass fraction of ~18wt.% the second method produced stiffer (270MPa), lighter (948kgm -3) and more electrically conductive (1.8Scm -1) composite while the first one gave softer (111MPa) and more ductile (141%) materials. These properties differences are related to the different PU/MWCNT dispositions obtained through each synthesis route. Nanotubes percolating concentration is found to be crucial on composite properties evolution and a preferential interaction of MWCNT with PU hard segments is observed for solvent cast composites.
AB - A comparative study of the influence of processing route on polyurethanes (PUs)/multiwalled carbon nanotube (MWCNT) composites mechanical and electrical properties and also morphology was undergone employing two differentiated processing methods, solvent casting and buckypaper infiltration, for producing PU composites with low, medium and high mass fractions of acid treated MWCNT, and with no covalent linkages between the matrix and the nanotubes. As for example, with a MWCNT mass fraction of ~18wt.% the second method produced stiffer (270MPa), lighter (948kgm -3) and more electrically conductive (1.8Scm -1) composite while the first one gave softer (111MPa) and more ductile (141%) materials. These properties differences are related to the different PU/MWCNT dispositions obtained through each synthesis route. Nanotubes percolating concentration is found to be crucial on composite properties evolution and a preferential interaction of MWCNT with PU hard segments is observed for solvent cast composites.
KW - A. Carbon nanotubes
KW - A. Polymer-matrix composites (PMCs)
KW - B. Mechanical properties
KW - Buckypaper infiltration
KW - E. Casting
UR - http://www.scopus.com/inward/record.url?scp=84855853875&partnerID=8YFLogxK
U2 - 10.1016/j.compscitech.2011.11.007
DO - 10.1016/j.compscitech.2011.11.007
M3 - Article
AN - SCOPUS:84855853875
SN - 0266-3538
VL - 72
SP - 235
EP - 242
JO - Composites Science and Technology
JF - Composites Science and Technology
IS - 2
ER -