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Title: Influence of carbon nanotubes on the rheology and dynamic mechanical properties of polyamide-12 for laser sintering
Authors: Bai, Jiaming
Goodridge, Ruth
Hague, Richard J.M.
Song, Mo
Okamoto, Masami
Keywords: Polymer-matrix composites
Rheological properties
Powder processing
Laser sintering
Issue Date: 2014
Publisher: Crown Copyright © Elsevier Ltd.
Citation: BAI, J. ... et al, 2014. Influence of carbon nanotubes on the rheology and dynamic mechanical properties of polyamide-12 for laser sintering. Polymer Testing, 36, pp. 95 - 100.
Abstract: The rheological behaviour of polymer nanocomposites is very important for polymer processing and understanding the structure-properties relationship. In this paper, the rheological properties of a polyamide 12 (PA12) - carbon nanotube (CNT) nanocomposite for laser sintering were studied. Compared to neat PA12, the presence of CNTs resulted in higher storage modulus (G′), loss modulus (G″) and viscosity (η). With an increase in temperature, viscosity showed an unusual increase for both PA12 and the PA12-CNT nanocomposites, which is likely to result from incomplete melting of powder particles. Dynamic mechanical analysis was carried out to examine the effect the CNTs were having on the laser sintered parts. The laser sintered PA12-CNT nanocomposite had an increased elastic modulus compared to that of neat PA12. The CNT and polymer matrix interaction hindered the chain motions, which resulted in higher loss modulus and decreased the thermal expansion coefficient.
Description: This is an Open Access article published by Elsevier under the terms of the Creative Commons Attribution Licence 3.0 http://creativecommons.org/licenses/by/3.0/ which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Sponsor: We would like to thank the Royal Society (501100000288) and the Great Britain Sasakawa Foundation (501100000625) (GBSF) for providing a travel grant to allow J. Bai to carry out research at Toyota Technological Institute, Japan.
Version: Published
DOI: 10.1016/j.polymertesting.2014.03.012
URI: https://dspace.lboro.ac.uk/2134/17906
Publisher Link: http://dx.doi.org/10.1016/j.polymertesting.2014.03.012
ISSN: 0142-9418
Appears in Collections:Published Articles (Materials)

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