Type

Journal Article

Authors

Jonathan Nesbit Coleman
Umar Khan

Subjects

Physics

Topics
mechanical properties electrical properties a carbon nanotubes cm 1 a polymer matrix composites pmcs l condensed matter physics low mass comparative study

Study of the mechanical, electrical and morphological properties of PU/ MWCNT composites obtained by two different processing routes (2012)

Abstract A comparative study of the influence of processing route on polyurethanes (PU)/ 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 ~ 18 wt% the second method produced stiffer (270 MPa), lighter (948 kg m-3) and more electrically conductive (1.8 S cm-1) composite while the first one gave softer (111 MPa) 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.
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Full list of authors on original publication

Jonathan Nesbit Coleman, Umar Khan

Experts in our system

1
Jonathan Coleman
Trinity College Dublin
Total Publications: 217
 
2
Umar Khan
Trinity College Dublin
Total Publications: 37