Polyethylene based silicate nanocomposites: synthesis, properties and structure

McHunter, Adrian (2002). Polyethylene based silicate nanocomposites: synthesis, properties and structure Honours Thesis, School of Engineering, The University of Queensland.

       
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Author McHunter, Adrian
Thesis Title Polyethylene based silicate nanocomposites: synthesis, properties and structure
School, Centre or Institute School of Engineering
Institution The University of Queensland
Publication date 2002
Thesis type Honours Thesis
Supervisor Not known
Total pages 59
Language eng
Subjects 091405 Mining Engineering
Formatted abstract
The aim of this report is to present to recent findings of how the addition of Cloisite 15A clay to polyethylene alters the semicrystalline structure. When polyethylene crystallizes from a molten state, the lamellae that form the rigid portion of the semicrystalline structure align themselves to form isolated structures called spherulites. Various factors such as; temperature, molecular weight and nucleation site density control the growth of these structures. In this report the polyethylene and Cloisite 15A clay were dissolved in solvent and then cast into a thin film. Once the cast was free of the solvents a small flake was melted onto a slide and then viewed under a microscope in polarized light. The formation of the spherulites in the polyethylene sample and the nanocomposite sample were then observed. It is hoped that whilst observing the samples it can be determined whether the Cloisite 15A clay nano-particles are nucleation sites for the spherulites or nucleation occurs at different sites. The crystallinity will also be assessed using DSC and Wide Angle X-ray Diffraction to establish whether the presence of the clay affects the type, quantity and perfection of the crystallinity in the polyethylene.
Keyword Polyethylene based silicate nanocomposites

Document type: Thesis
Collection: UQ Theses (non-RHD) - UQ staff and students only
 
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Created: Thu, 04 Dec 2014, 15:19:33 EST by Asma Asrar Qureshi on behalf of Scholarly Communication and Digitisation Service