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    Chain extension of polyamide 6/organoclay nanocomposites

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    Publication date
    2019-06-03
    Author
    Tuna, Basak
    Benkreira, Hadj
    Keyword
    PA6-organoclay
    Nanocomposites
    Chain extenders
    Thermal degradation
    Rights
    © 2019 Wiley. This is the peer-reviewed version of the following article: Tuna B and Benkreira H (2019) Chain extension of polyamide 6/organoclay nanocomposites. Polymer Engineering and Science, which has been published in final form at https://doi.org/10.1002/pen.25106. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
    Peer-Reviewed
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    Abstract
    Thermal degradation of polyamide 6 (PA6)/organoclay nanocomposites is a serious impediment to wider applications of these nanocomposites. In this study, a solution is proposed based on the well‐established use of chain extenders. As in PA6, thermal degradation, in the absence of moisture, produces broken polymer chains with amide end groups, a chain extender with anhydride functionalities, known to be strongly reactive with amide groups, was used to reconnect the chains. Experiments conducted using a laboratory twin‐screw extruder were first checked, through transmission electron microscopy observations, to have produced good organoclay intercalation and exfoliation into PA6. Following from this, samples with the chain extender added were produced and characterized. The data obtained were conclusive in the effectiveness of the chain extender: for the chain extended nanocomposites, there is an enhancement in the value of the complex viscosity by 7 times and in the storage modulus by 88 times, while the tensile modulus increased by 57% compared with the neat PA6. The nonchain extended nanocomposite achieved in comparison an enhancement of 2 times the value of the complex viscosity and 19 times the storage modulus while the tensile modulus increased by 53% compared to the neat PA6. These data provide conclusive proof on the rationale that anhydride functionalities should be sought when developing chain extenders for PA6 nanocomposites.
    URI
    http://hdl.handle.net/10454/16992
    Version
    Accepted manuscript
    Citation
    Tuna B and Benkreira H (2019) Chain extension of polyamide 6/organoclay nanocomposites. Polymer Engineering and Science. 59(6): 1233-1241.
    Link to publisher’s version
    https://doi.org/10.1002/pen.25106
    Type
    Article
    Collections
    Engineering and Informatics Publications

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