Título
Thermodiffusion, diffusion and Soret coefficients of binary polymeric mixtures in toluene and cyclohexaneOtras instituciones
IkerbasqueUniversität Bayreuth (Alemania)
Versión
Version publicada
Derechos
© 2024 De GruyterAcceso
Acceso embargadoVersión del editor
https://doi.org/10.1515/jnet-2023-0125Publicado en
Journal of Non-Equilibrium Thermodynamics Editor
De GruyterPalabras clave
polystyrene
transport properties
thermoproperties
Thermogravitational column ... [+]
transport properties
thermoproperties
Thermogravitational column ... [+]
polystyrene
transport properties
thermoproperties
Thermogravitational column
optical beam deflection
DCMIX [-]
transport properties
thermoproperties
Thermogravitational column
optical beam deflection
DCMIX [-]
Resumen
We present the results of experimental study on measuring the thermodiffusion, molecular diffusion and Soret coefficients of polystyrene (4,880 g/mol) in the pure solvents toluene and cyclohexane at 2 ... [+]
We present the results of experimental study on measuring the thermodiffusion, molecular diffusion and Soret coefficients of polystyrene (4,880 g/mol) in the pure solvents toluene and cyclohexane at 298 K and atmospheric pressure. The experiments have been carried out for a wide range of concentrations, starting from the diluted state with 2 % polystyrene mass fraction (proposed in the DCMIX4 project) up to the semidilute regime of 20 % polystyrene mass fraction. In addition, we present a complete characterisation of the thermophysical properties of the analysed mixtures. Thermodiffusion, molecular diffusion and Soret coefficients of binary polymeric samples have been measured by combining the traditional thermogravitational column technique, the thermogravitational microcolumn and the optical beam deflection method. In toluene, the obtained experimental results are consistent with literature, showing that the magnitude of the mass transport thermoproperties decrease significantly with increasing polystyrene concentration, which is a first indication of an approaching glass transition in the concentrated regime. The results for thermodiffusion and molecular diffusion coefficients in cyclohexane as a function of concentration exhibit a similar trend. Nevertheless, the Soret coefficient seems to show an opposite tendency for the two solvents, increasing in magnitude for cyclohexane, at least up to the analysed polystyrene concentration. [-]
Financiador
Diputación Foral de GipuzkoaGobierno Vasco
Gobierno Vasco
Gobierno Vasco
Gobierno de España
Centro Aeroespacial de Alemania (DLR)
Programa
Programa de apoyo a la Red guipuzcoana de Ciencia, Tecnología e InnovaciónIkertalde Convocatoria 2022-2025
Elkartek 2023
Programa predoctoral (Investigación general) 2022
Programa Estatal de Generación de Conocimiento y Fortalecimiento Científico y Tecnológico del Sistema de I+D+i y del Programa Estatal de I+D+i Orientada a los Retos de la Sociedad
Sin información
Número
2022-CIEN-000052-01IT1505-22
KK-2023-00041
PRE_2022_1_0136
PID2020-115086GB-C33
50WM2147
URI de la ayuda
Sin informaciónSin información
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Proyecto
Hozte teknologia multifasiko eraginkorren garapenerako beharrezko propietateen karakterizazio eta modelizazio numerikoa mugikortasun elektriko jasangarrirantz (HOZTIKOR)Mecánica de fluidos
Materiales magnetoactivos avanzados para nuevos sistemas inteligentes (MMASINT)
Sin información
Sin información
Sin información
Colecciones
- Artículos - Ingeniería [639]