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Impact of dispersion of interfaces on the rheology of polymeric nanocomposites

Impact of dispersion of interfaces on the rheology of polymeric nanocomposites
Impact of dispersion of interfaces on the rheology of polymeric nanocomposites
This work focuses on the rheological properties of polymeric nanocomposites. A model system based on aqueous surfactant dispersions is explored to define the limitations of a concentric cylinder rheometer and its software. Following on from this, hydropolymeric/silicate clay dispersions are studied to assess if dispersion can be quantified. To this end, a reliable methodology of data processing is described, which incorporates the use of the De Kee equation for a variety of sample compositions. The effects caused by the presence of silicate particulates on the crystallisation properties are studied using optical microscopy techniques.

Electrical characterisation using standard AC breakdown techniques is applied to study the effects rheological dispersion has on an epoxy composites insulation properties. Two types of filler are used; silicates and hydroxides of alumina in the form of montmorillonite and functionalised and unfunctionalised boehmite. Raman spectroscopy is used to identify the surface chemistry of the functionalised boehmite.

Lastly, the Raman technique is employed in developing a methodology to organically modify inorganic particulates in the form of nano sized silicon dioxide. Functionalised silicon dioxide nanocomposites are manufactured using a combination of sonication and rheology to promote dispersion. Samples are then electrically tested using a standard AC electrical break down procedure.
Matheson, Toby
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Matheson, Toby
4636bede-a09c-4e51-a1aa-bb4f6a38c252
Vaughan, Alun
6d813b66-17f9-4864-9763-25a6d659d8a3
Lewin, Paul
78b4fc49-1cb3-4db9-ba90-3ae70c0f639e
Wilkinson, James
73483cf3-d9f2-4688-9b09-1c84257884ca

Matheson, Toby (2009) Impact of dispersion of interfaces on the rheology of polymeric nanocomposites. University of Southampton, School of Electronics and Computer Science, Masters Thesis, 180pp.

Record type: Thesis (Masters)

Abstract

This work focuses on the rheological properties of polymeric nanocomposites. A model system based on aqueous surfactant dispersions is explored to define the limitations of a concentric cylinder rheometer and its software. Following on from this, hydropolymeric/silicate clay dispersions are studied to assess if dispersion can be quantified. To this end, a reliable methodology of data processing is described, which incorporates the use of the De Kee equation for a variety of sample compositions. The effects caused by the presence of silicate particulates on the crystallisation properties are studied using optical microscopy techniques.

Electrical characterisation using standard AC breakdown techniques is applied to study the effects rheological dispersion has on an epoxy composites insulation properties. Two types of filler are used; silicates and hydroxides of alumina in the form of montmorillonite and functionalised and unfunctionalised boehmite. Raman spectroscopy is used to identify the surface chemistry of the functionalised boehmite.

Lastly, the Raman technique is employed in developing a methodology to organically modify inorganic particulates in the form of nano sized silicon dioxide. Functionalised silicon dioxide nanocomposites are manufactured using a combination of sonication and rheology to promote dispersion. Samples are then electrically tested using a standard AC electrical break down procedure.

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More information

Published date: October 2009
Organisations: University of Southampton, Optoelectronics Research Centre

Identifiers

Local EPrints ID: 146301
URI: https://eprints.soton.ac.uk/id/eprint/146301
PURE UUID: 0a8d48c2-0742-4125-add1-5c26d02ffe64
ORCID for Alun Vaughan: ORCID iD orcid.org/0000-0002-0535-513X
ORCID for James Wilkinson: ORCID iD orcid.org/0000-0003-4712-1697

Catalogue record

Date deposited: 16 Jun 2010 15:32
Last modified: 09 May 2019 00:36

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