Thermal characterisation of metal stearate lubricant mixtures for polymer compounding applications

dc.contributor.authorPhillips, Justin
dc.contributor.authorWeldhagen, Michelle
dc.contributor.authorMhlabeni, Thobile Lillian
dc.contributor.authorRadebe, Lucky
dc.contributor.authorRamjee, Shatish
dc.contributor.authorWesley-Smith, James
dc.contributor.authorAtanasova, Maria T.
dc.contributor.authorFocke, Walter Wilhelm
dc.contributor.emailwalter.focke@up.ac.zaen_US
dc.date.accessioned2022-09-07T07:10:18Z
dc.date.issued2021-05
dc.description.abstractMetal stearate blends are potential lubricants and filler dispersants in polymer compounding. Therefore, the thermal phase behaviour of binary blends of calcium stearate and magnesium stearate with zinc stearate was investigated. Cooling curve studies indicated lower melting temperatures in both systems. X-ray diffraction studies revealed that this was due to the formation of solid solutions of variable composition rather than to eutectic formation. Rheology measurements showed that true fluidification only happened well above the apparent melting points established from cooling curves. Calcium carbonate filled polyethylene containing metal stearate mixtures showed lower melt viscosities than were achievable using only calcium- or magnesium stearate as the lubricant. These results suggest that metal stearate blends, in combination with a judiciously selected wax component, may offer advantages in lowering compound melt viscosity and facilitating better particle dispersion.en_US
dc.description.departmentChemical Engineeringen_US
dc.description.embargo2023-02-25
dc.description.librarianhj2022en_US
dc.description.sponsorshipSasol South Africa Limiteden_US
dc.description.urihttp://www.elsevier.com/locate/tcaen_US
dc.identifier.citationPhillips, J., Weldhagen, M., Mhlabeni, T. et al. 2021, 'Thermal characterisation of metal stearate lubricant mixtures for polymer compounding applications', Thermochimica Acta, vol. 699, art. 178906, pp. 1-8, doi : 10.1016/j.tca.2021.178906.en_US
dc.identifier.issn0040-6031 (print)
dc.identifier.issn1872-762X (online)
dc.identifier.other10.1016/j.tca.2021.178906
dc.identifier.urihttps://repository.up.ac.za/handle/2263/87093
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.rights© 2021 Elsevier B.V. All rights reserved. Notice : this is the author’s version of a work that was accepted for publication in Thermochimica Acta. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. A definitive version was subsequently published in Thermochimica Acta, vol. 699, art. 178906, pp. 1-8, 2021. doi :10.1016/j.tca.2021.178906.en_US
dc.subjectMetal stearateen_US
dc.subjectLubricanten_US
dc.subjectDispersanten_US
dc.subjectThermal analysisen_US
dc.subjectFilleren_US
dc.titleThermal characterisation of metal stearate lubricant mixtures for polymer compounding applicationsen_US
dc.typePostprint Articleen_US

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