Investigation of thermal conductivity and breakdown strength in polypropylene/ultra-high molecular weight polyethylene blends
Investigation of thermal conductivity and breakdown strength in polypropylene/ultra-high molecular weight polyethylene blends
This work presents a dielectric composite material with enhanced thermal conductivity: polypropylene (PP) is blended with ultra-high molecular weight polyethylene (UHMWPE) with up to 30% by weight, prepared by a solution blending method. Differential scanning calorimetry shows two distinct melting peaks of UHMWPE and PP phases respectively. The bimodal trend in crystallization temperature confirms poor mixing and separate crystal formation. The maximum thermal conductivity of the composites is ~0.30W/m·K, which is an increase of 35.5% compared to neat PP. The high viscosity of the mixing solvent, on the other hand, causes reduced chain alignment, resulting in reduced thermal conductivity enhancement. When compared to neat PP, the blends exhibit an AC breakdown strength that is reduced by just 3.6%, which is not significant considering measurement uncertainties. We conclude that the breakdown strength of these systems is relatively unaffected by their composition, due to an unchanged morphology.
5-8
Ketsamee, Phichet
320757bd-99cd-43d2-a8e8-b8100f15f461
Andritsch, Thomas
8681e640-e584-424e-a1f1-0d8b713de01c
Vaughan, Alun
6d813b66-17f9-4864-9763-25a6d659d8a3
29 August 2022
Ketsamee, Phichet
320757bd-99cd-43d2-a8e8-b8100f15f461
Andritsch, Thomas
8681e640-e584-424e-a1f1-0d8b713de01c
Vaughan, Alun
6d813b66-17f9-4864-9763-25a6d659d8a3
Ketsamee, Phichet, Andritsch, Thomas and Vaughan, Alun
(2022)
Investigation of thermal conductivity and breakdown strength in polypropylene/ultra-high molecular weight polyethylene blends.
In Proceedings of the 2022 IEEE 4th International Conference on Dielectrics (ICD).
IEEE.
.
(doi:10.1109/ICD53806.2022.9863540).
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Conference or Workshop Item
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Abstract
This work presents a dielectric composite material with enhanced thermal conductivity: polypropylene (PP) is blended with ultra-high molecular weight polyethylene (UHMWPE) with up to 30% by weight, prepared by a solution blending method. Differential scanning calorimetry shows two distinct melting peaks of UHMWPE and PP phases respectively. The bimodal trend in crystallization temperature confirms poor mixing and separate crystal formation. The maximum thermal conductivity of the composites is ~0.30W/m·K, which is an increase of 35.5% compared to neat PP. The high viscosity of the mixing solvent, on the other hand, causes reduced chain alignment, resulting in reduced thermal conductivity enhancement. When compared to neat PP, the blends exhibit an AC breakdown strength that is reduced by just 3.6%, which is not significant considering measurement uncertainties. We conclude that the breakdown strength of these systems is relatively unaffected by their composition, due to an unchanged morphology.
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Investigation_of_Thermal_Conductivity_and_Breakdown_Strength_in_Polypropylene_Ultra-High_Molecular_Weight_Polyethylene_Blends
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Accepted/In Press date: 3 July 2022
e-pub ahead of print date: 29 August 2022
Published date: 29 August 2022
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© 2022 IEEE.
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2022 IEEE 4th International Conference on Dielectrics (ICD), , Palermo, Italy, 2022-07-03 - 2022-07-07
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Local EPrints ID: 470635
URI: http://eprints.soton.ac.uk/id/eprint/470635
PURE UUID: 03c36ba6-5eb5-4e70-9f1f-08871207d355
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Date deposited: 17 Oct 2022 16:35
Last modified: 18 Mar 2024 03:54
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Author:
Phichet Ketsamee
Author:
Thomas Andritsch
Author:
Alun Vaughan
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