Carbon-nanotube nucleated crystallinity in a conjugated polymer based composite

Kevin P. Ryan, Trinity College Dublin
Stephen M. Lipson, Trinity College Dublin
Anna Drury, Trinity College Dublin
Martin Cadek, Trinity College Dublin
Manuel Ruether, Trinity College Dublin
Sean M. O'Flaherty, Trinity College Dublin
Valerie Barron, Trinity College Dublin
Brendan McCarthy, University of Arizona
Hugh J. Byrne, Dublin Institute of Technology
Werner J. Blau, Trinity College Dublin
Jonathan N. Coleman, Trinity College Dublin

Document Type Article

Published in Chemical Physics Letters 391 (2004) 29-333


It is suspected that many of the physical properties observed in polymer–carbon nanotube composites are related to the formation of crystalline polymer coatings around the nanotubes. Here, a semi-conjugated polymer, poly(m-phenylenevinylene-co-2,5- dioctyloxy-p-phenylenevinylene) (PmPV), is doped with multiwalled carbon nanotubes (MWNT). Differential scanning calorimetry of thin composite films has been used to verify that MWNT nucleate polymer crystallization. In addition, these results allow calculation of a thickness of 25 nm for the crystalline region adjacent to the nanotube in reasonable agreement with a value of 32 nm obtained from photoluminescence studies.