Claire McIlroy - Modelling Extrusion-Based 3D Printing of Entangled Polymers
| Dates: | 23 October 2019 |
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| Times: | 14:00 - 14:50 |
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| What is it: | Seminar |
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| Organiser: | Department of Mathematics |
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| Who is it for: | University staff, External researchers, Current University students |
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| Speaker: | Claire McIlroy |
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Claire McIlroy (University of Lincoln) joins us for this seminar in the Physical Applied Mathematics Series. Note the unusual room - G.209 in the Alan Turing Building.
Abstract: The most common method for printing plastics (polymer melts) is known as fused filament fabrication (FFF). This process involves melting a thermoplastic, followed by layer-by-layer extrusion, cooling and re-solidification. The main concern with FFF is the strength at the welds between printed layers; bulk strength is never achieved in these regions and the reason is currently unclear.
We use a molecularly-aware non-isothermal continuum model of the polymer melt to predict how high-shear rates during the deposition process can stretch and align polymer molecules with the flow direction. For amorphous melts, we attribute reduced weld strength to a partially disentangled and oriented structure at the onset of the glass transition. For semi-crystalline melts, we explore how the stretch induced by the printing flow can enhance nucleation and lead to accelerated crystallization times and consequently a thin surface layer of smaller spherulites.
Speaker
Claire McIlroy
Organisation: University of Lincoln
Travel and Contact Information
Find event
G.209
Alan Turing Building
Manchester
