{"title":"Volumetric Properties and Viscosity of PIBs and PIB-Based Dispersants in a Mineral Oil","authors":"Katrina Avery, Mark T. Devlin, Erdogan Kiran","doi":"10.1007/s10765-024-03485-2","DOIUrl":null,"url":null,"abstract":"<div><p>In this study we report on the influence of poly(isobutylene) (PIB) and PIB-based dispersants on the high pressure thermodynamic properties and the viscosity of a mineral base oil used in passenger vehicle transmission fluids. Density was measured over a pressure range from 10 to 35 MPa at isotherms of 298, 323, 348, 373, and 398 K using a high pressure variable-volume view cell. The density data were then correlated with the Sanchez-Lacombe Equation of State from which the thermodynamic properties of isothermal compressibility, isobaric expansively and internal pressure were derived. Viscosity was measured over a pressure range from 10 to 45 MPa at 298, 323, 248, and 373 K using a uniquely designed high pressure rotational viscometer. Viscosity data were then correlated with density according to the free volume and density-scaling formalisms to provide further insights into molecular packing and interactions.</p></div>","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"46 1","pages":""},"PeriodicalIF":2.5000,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10765-024-03485-2.pdf","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Thermophysics","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s10765-024-03485-2","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
In this study we report on the influence of poly(isobutylene) (PIB) and PIB-based dispersants on the high pressure thermodynamic properties and the viscosity of a mineral base oil used in passenger vehicle transmission fluids. Density was measured over a pressure range from 10 to 35 MPa at isotherms of 298, 323, 348, 373, and 398 K using a high pressure variable-volume view cell. The density data were then correlated with the Sanchez-Lacombe Equation of State from which the thermodynamic properties of isothermal compressibility, isobaric expansively and internal pressure were derived. Viscosity was measured over a pressure range from 10 to 45 MPa at 298, 323, 248, and 373 K using a uniquely designed high pressure rotational viscometer. Viscosity data were then correlated with density according to the free volume and density-scaling formalisms to provide further insights into molecular packing and interactions.
期刊介绍：
International Journal of Thermophysics serves as an international medium for the publication of papers in thermophysics, assisting both generators and users of thermophysical properties data. This distinguished journal publishes both experimental and theoretical papers on thermophysical properties of matter in the liquid, gaseous, and solid states (including soft matter, biofluids, and nano- and bio-materials), on instrumentation and techniques leading to their measurement, and on computer studies of model and related systems. Studies in all ranges of temperature, pressure, wavelength, and other relevant variables are included.
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