Deformation behaviour during cold drawing of nanocomposites based on single wall carbon nanotubes and poly(ether ester) copolymers

Relationships between the macroscopic deformation behaviour and microstructure of a pure (PBT- b-PTMO) block copolymer and a polymer nanocomposite (PBT- b-PTMO + 0.2 wt% SWCNT) were investigated by simultaneous small- and wide-angle X-ray scattering (SAXS and WAXS) during tensile deformation using s...

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Bibliographic Details
Published in:Polymer (Guilford) 2007-01, Vol.48 (11), p.3286-3293
Main Authors: Hernández, J.J., García-Gutiérrez, M.C., Nogales, A., Rueda, D.R., Sanz, A., Sics, I., Hsiao, B.S., Roslaniec, Z., Broza, G., Ezquerra, T.A.
Format: Article
Language:English
Subjects:
Applied sciences
CARBON
CHAINS
Composites
COPOLYMERS
DEFORMATION
Deformation behaviour
Exact sciences and technology
Forms of application and semi-finished materials
MATERIALS SCIENCE
MICROSTRUCTURE
NANOTUBES
national synchrotron light source
PARTICLE ACCELERATORS
Polymer industry, paints, wood
Polymer nanocomposites
POLYMERS
SCATTERING
Simultaneous SAXS and WAXS
SYNCHROTRON RADIATION
Technology of polymers
YIELD STRENGTH
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Summary:Relationships between the macroscopic deformation behaviour and microstructure of a pure (PBT- b-PTMO) block copolymer and a polymer nanocomposite (PBT- b-PTMO + 0.2 wt% SWCNT) were investigated by simultaneous small- and wide-angle X-ray scattering (SAXS and WAXS) during tensile deformation using synchrotron radiation. The Young's modulus was found to be 15% higher for the nanocomposite than for the pure block copolymer as well as the yield strength, while the elongation-to-break was less than a half. This different behaviour can be explained by taking into account the different structural features revealed by SAXS and WAXS and thus considering that SWCNT act as anchors in the nanocomposite, sharing the applied stress with the PBT crystals and partially preventing the flexible, non-crystallisable PTMO chains to elongate.
ISSN:0032-3861
1873-2291
DOI:10.1016/j.polymer.2007.03.070