An Analytical Equation of State Extended to Copolymers
الموضوعات : Physical Chemistry & Electrochemistry
1 - Young Researchers and Elite Club, Marvdasht Branch, Islamic Azad University,Marvdasht, Iran
Abstract
الکلمات المفتاحية: Equation of state, thermodynamic properties, Copolymer melts,
ملخص المقالة :
calculate some thermodynamic properties of molten polymers including specific volume and isothermal compressibility (S.M. Hoseini, Physical Chemistry & Electrochemistry, 2 (2014) 56-65). This work extended that EOS to predict the volumetric properties of some molten ethylene copolymers including ethylene/1-octene, ethylene/1-butene (xethylene equal to 0.8543 and 0.563), ethylene/propene. The ability of the extended EOS was checked by comparing the results with 738 literature data points for the specific volumes over the temperature range from 422.35-505.89 K and pressure range from 0.1 up to 200 MPa. The average absolute deviation (AAD) of the calculated specific volumes from literature data was found to be 1.12%. The isothermal compressibility coefficients, κT have also been predicted using ISM EOS. From 180 data points examined, the AAD of estimated κT was equal to 8.48%. Our calculations on the volumetric and thermodynamic properties of studied copolymers reproduced the literature data with reasonably good accuracy.
Equation of state, Copolymer melts, Thermodynamic properties
[1] P. Moldenaers, R. Keunings, Theoretical and Applied Rheology: Proceedings of the XIth International Congress on Rheology, Brussels, Belgium, August 17-21, 1992, Elsevier, (2013).
[2] Y. Guerrieri, G.M.N. Costa, K.V. Pontes, M. Embiruçu, A Survey of Equations of State for Polymers, INTECH Open Access Publisher, (2012).
[3] N. Orbey, S.I. Sandler, AIChE journal, 40 (1994) 1203-1209.
[4] T. Sako, A.H. Wu, J.M. Prausnitz, Journal of applied polymer science, 38 (1989) 1839-1858.
[5] C. Zhong, H. Masuoka, Fluid Phase Equilibria, 123 (1996) 59-69.
[6] W.G. Chapman, G. Jackson, K.E. Gubbins, Molecular Physics, 65 (1988) 1057-1079.
[7] Z. AMOOZANDEH, F. YOUSEFI, High Temperatures--High Pressures, 44 (2015).
[8] F. Yousefi, P. Ourak, High Temperatures--High Pressures, 43 (2014).
[9] S.M. Hoseini, Physical Chemistry & Electrochemistry, 2 (2014) 56-65.
[10] G. Ihm, Y. Song, E. Mason, The Journal of chemical physics, 94 (1991) 3839-3848.
[11] F. Yousefi, High Temp High Press, 42 (2013) 211-226.
[12] F. Yousefi, H. Karimi, R. Ghafarian Shirazi, M. Gomar, High Temperature High Pressure, (2013) 42451-42467.
[13] C. Wohlfarth, CRC handbook of thermodynamic data of polymer solutions at elevated pressures, CRC Press, (2005).
[14] J. Dymond, R. Malhotra, International journal of thermophysics, 9 (1988) 941-951.
