Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/142901
Title: Development of organically modified montmorillonite/polypropylene composite powders for selective laser sintering
Authors: Tan, Lisa Jiaying
Zhu, Wei
Zhou, Kun
Keywords: Engineering::Manufacturing
Issue Date: 2020
Source: Tan, L. J., Zhu, W., & Zhou, K. (2020). Development of organically modified montmorillonite/polypropylene composite powders for selective laser sintering. Powder Technology, 369, 25-37. doi:10.1016/j.powtec.2020.05.005
Journal: Powder Technology
Abstract: Organically modified montmorillonite/polypropylene (OMMT/PP) composite powders for selective laser sintering (SLS) were developed using four powder preparation methods including melt extrusion combined with cryogenic grinding, thermally induced phase separation (TIPS), surface coating, and mechanical mixing. Evaluations were conducted on the shape and size, powder-bed surface roughness, and thermal behavior of the developed composite powders as well as the mechanical properties of their injection-moulded tensile specimens. Melt extrusion proved to be the most favorable as the powders exhibited the highest thermo-oxidative stability (Td,max = 378 °C) and enhanced mechanical strength and ductility. TIPS could produce powders with reduced crystallization temperatures and increased melt enthalpies that were beneficial for SLS, and with powder morphology ideal for SLS without post-processing. It was found that at low loadings, nanofillers with sheet-like structures such as OMMT could limit the increase in crystallization temperatures of the composite powder, thus ensuring their wide sintering windows for SLS.
URI: https://hdl.handle.net/10356/142901
ISSN: 0032-5910
DOI: 10.1016/j.powtec.2020.05.005
Rights: © 2020 Elsevier B.V. All rights reserved. This paper was published in Powder Technology and is made available with permission of Elsevier B.V.
Fulltext Permission: embargo_20221231
Fulltext Availability: With Fulltext
Appears in Collections:MAE Journal Articles

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