Abstract
High density polyethylene (HDPE) and polypropylene (PP) solubility in several pure and blend non-polar organic solvents was measured at 365–430 K temperature at atmospheric pressure, with polymer concentration of 0.5–25 g in 100 ml of solvent. The activity coefficients were estimated depending on the experimental solubility results for all the polymer-solvent systems. A non-ideal equation combined with activity coefficient was developed based on the crystallinity. A new correlation equation was attained, which is based on the melting temperature and heat of fusion using SSPS software. These two equations were used to predict the solid-liquid experimental data for the binary system polymer-solvent. The distinction between the experimental and model data was assessed by using mean absolute deviation percentage (MAD %). The non-ideal equation based on crystallinity and the new correlations showed low MAD %, displaying a close match with the experimental data.
References
1. Dennis WH, Klavs J. Microelectronics processing. Washington, DC: American Chemical Society, 1989:1.Search in Google Scholar
2. Tsay CS, Mchugh AJ. Mass transfer modeling of asymmetric membrane formation by phase inversion. J Polym Sci Part B. 1990;28:1327–1365.10.1002/polb.1990.090280810Search in Google Scholar
3. Yeh TF, Reiser A, Dammel RR, Pawlowski G. A percolation view of novolak dissolution. 2. The statistics of a three-dimensional cubic percolation field and a generalized scaling law. Macromolecules. 1993;26:3862–3869.10.1021/ma00067a023Search in Google Scholar
4. Smith P, Lemstra J. Ultra-high-strength polyethylene filaments by solution spinning/drawing. J Mater Sci. 1980;15:505–514.10.1007/BF02396802Search in Google Scholar
5. Smith P, Pennings AJ. Eutectic solidification of the pseudo binary system of polyethylene and 1, 2, 4, 5-tetrachlorobenzene. J Mater Sci. 1976;11:1450–1459.10.1007/BF00540877Search in Google Scholar
6. Richards RB. The phase equilibria between a crystalline polymer and solvents. I. The effect of polymer chain length on the solubility and swelling of polythene. Trans Faraday Soc. 1946;42:10–28.10.1039/tf9464200010Search in Google Scholar
7. Nakajima A. Estimation of thermodynamic interactions between polyethylene and n-alkanes by means of melting point measurements. Colloid & Polym Sci. 1965;205:51–61.10.1007/BF01499849Search in Google Scholar
8. Nakajima A, Fujiwara H. Phase relationships and thermodynamic interactions in isotactic polypropylene–diluent systems. J Polym Sci Part A-2 Polym Phys. 1968;6:723–733.10.1002/pol.1968.160060408Search in Google Scholar
9. Smith P, Pennings AJ. Eutectic crystallization of pseudo binary systems of polyethylene and high melting diluents. Polymer (Guildf). 1974;15:413–419.10.1016/0032-3861(74)90103-7Search in Google Scholar
10. Pan C, Radosz M. Modeling of solid-liquid equilibria in naphthalene, normal-alkane and polyethylene solutions. Fluid Phase Equilib. 1999;155:57–73.10.1016/S0378-3812(98)00454-3Search in Google Scholar
11. Maity SK. Modeling and simulation of solid-liquid equilibrium by perturbed-chain statistical associating fluid theory. Indian Institute of Technology, 2004.Search in Google Scholar
12. Hadi AJ, Najmuldeen GF, Bin YK. Dissolution/reprecipitation technique for waste polyolefin recycling using new pure and blend organic solvents. J Polym Eng. 2013;33:471–481.10.1515/polyeng-2013-0027Search in Google Scholar
13. Hadi AJ, Najmuldeen GF, Ahmed I. Potential solvent for reconditioning polyolefin waste materials. J Polym Eng. 2012;32:585–591. DOI:10.1515/polyeng-2012-0081.Search in Google Scholar
14. Jasim A, Faisal G. Reconditioning process of waste low density polyethylene using new technique. J Purity Util React Environ. 2012;1:400–410.Search in Google Scholar
15. Hadi AJ, Najmuldeen GF, Ahmed I. Polyolefins waste materials reconditioning using dissolution/reprecipitation method. APCBEE Procedia. 2012;3:281–286. DOI:10.1016/j.apcbee.2012.06.083.Search in Google Scholar
16. Hadi J, Najmuldeen F, Ahmed I. Quality restoration of waste polyolefin plastic material through the dissolution-reprecipitation technique. Chem Ind Chem Eng Q. 2014;20:163–170. DOI:10.2298/CICEQ120526119H.Search in Google Scholar
17. Strazielle C, Benoît H. Molecular characterization of commercial polymers. Pure Appl Chem. 1971;42:451–480.10.1351/pac197126030451Search in Google Scholar
18. Smith J, Van Ness H, Abbott M. Introduction to chemical engineering thermodynamics, 6th ed. New York: McGraw-Hill ISE, 2001 .Search in Google Scholar
19. Walas SM. Phase equilibria in chemical engineering. Boston: Butterworth, 1985.Search in Google Scholar
20. Prausnitz J, Lichtenthaler R. Molecular thermodynamics of fluid-phase equilibria, 3rd ed. New York: Prentice Hall, 1998 .Search in Google Scholar
21. Sandler S. Chemical, biochemical, and engineering thermodynamics. New York: Wiley, 2006 .Search in Google Scholar
22. TN 48 Polymer Heats of Fusion. TA Instruments.Search in Google Scholar
23. Wunderlich B. Thermal analysis. New York: Acad Press, 1990:417–431. .10.1016/B978-0-12-765605-2.50008-XSearch in Google Scholar
24. Krevelen V, Nijenhuis K. Properties of polymers. Their correlation with chemical structure, their numerical estimation and prediction from additive group contribution, 4th ed. New York: Elsevier publications, 2009 .Search in Google Scholar
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