Thermal characterisation of metal stearate lubricant mixtures for polymer compounding applications
| dc.contributor.author | Phillips, Justin | |
| dc.contributor.author | Weldhagen, Michelle | |
| dc.contributor.author | Mhlabeni, Thobile Lillian | |
| dc.contributor.author | Radebe, Lucky | |
| dc.contributor.author | Ramjee, Shatish | |
| dc.contributor.author | Wesley-Smith, James | |
| dc.contributor.author | Atanasova, Maria T. | |
| dc.contributor.author | Focke, Walter Wilhelm | |
| dc.contributor.email | walter.focke@up.ac.za | en_US |
| dc.date.accessioned | 2022-09-07T07:10:18Z | |
| dc.date.issued | 2021-05 | |
| dc.description.abstract | Metal 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.department | Chemical Engineering | en_US |
| dc.description.embargo | 2023-02-25 | |
| dc.description.librarian | hj2022 | en_US |
| dc.description.sponsorship | Sasol South Africa Limited | en_US |
| dc.description.uri | http://www.elsevier.com/locate/tca | en_US |
| dc.identifier.citation | Phillips, 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.issn | 0040-6031 (print) | |
| dc.identifier.issn | 1872-762X (online) | |
| dc.identifier.other | 10.1016/j.tca.2021.178906 | |
| dc.identifier.uri | https://repository.up.ac.za/handle/2263/87093 | |
| dc.language.iso | en | en_US |
| dc.publisher | Elsevier | en_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.subject | Metal stearate | en_US |
| dc.subject | Lubricant | en_US |
| dc.subject | Dispersant | en_US |
| dc.subject | Thermal analysis | en_US |
| dc.subject | Filler | en_US |
| dc.title | Thermal characterisation of metal stearate lubricant mixtures for polymer compounding applications | en_US |
| dc.type | Postprint Article | en_US |