[en] Morphological changes in immiscible polymer blends have been studied in shear flow using an original method based on quenching following deformation of molten samples Relaxation effects wete expected to be negligible during cooling and, hence, the real shear-induced blend microstructure could be analyzed The method has been successfully applied to follow morphological changes of immiscible blends composed of polystyrene and relatively high amounts of high-density polyethylene during creep experiments. The final steady-state morphology appeared to be intimately related to the applied shear stress and total deformation. Coalescence as well as large deformation and orientation of the dispersed phase panicles have been observed depending on the flow conditions The variations with time of the blend rheological properties and morphological observations are in qualitative agreement.
Research Center/Unit :
Center for Education and Research on Macromolecules (CERM)
Disciplines :
Chemistry Materials science & engineering
Author, co-author :
Martin, P. P.; Ecole Polytechnique, Montreal, Canada > Department of Chemical Engineering > Centre de Recherche Appliquée sur les Polymères
Carreau, P. J.; Ecole Polytechnique, Montreal, Canada > Department of Chemical Engineering > Centre de Recherche Appliquée sur les Polymères
Favis, B. D.; Ecole Polytechnique, Montreal, Canada > Department of Chemical Engineering > Centre de Recherche Appliquée sur les Polymères
Jérôme, Robert ; Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Language :
English
Title :
Investigating the morphology/rheology interrelationships in immiscible polymer blends
Bourry, D. and B. D. Favis, "Cocontinuity and phase inversion in HDPE/PS blends: Influence of interfacial modification and elasticity," J. Polym. Sci., Part B: Polym. Phys. 36, 1889-1899 (1998).
Carreau, P. J., M. Bousmina, and A. Ajji, in "Rheological properties of blends: Fact and challenges," Progress in Pacific Polymer Science-3, edited by K. P. Ghiggin (Springer, New York, 1994), pp. 25-40.
Chin, H. B. and C. D. Han, "Studies on droplet deformation and breakup. II. Breakup of a droplet in nonuniform shear flow," J. Rheol. 24, 1-37 (1980).
Cox, R. G., "The deformation of a drop in a general time dependent flow," J. Fluid Mech. 37, 601-623 (1969).
Elemans, P. H. M., J. M. van Wunnik, and R. A. van Dam, "Development of morphology in blends of immiscible polymers," AlChE. J. 43, 1649-1651 (1997).
Elmendorp, J. J. and R. J. Maalcke. "A study on polymer blending microrheology: Part 1," Polym. Eng. Sci. 25, 1041-1047 (1985).
Favis, B. D., "Polymer alloys and blends: Recent advances," Can. J. Chem. Eng. 69, 619-625 (1991).
Favis, B. D. and J. P. Chalifoux, "The effect of viscosity ratio on the morphology of polypropylene/ polycarbonate blends during processing," Polym. Eng. Sci. 27, 1591-1600 (1987).
Favis, B. D. and D. Therrien, "Factors influencing structure formation and phase size in an immiscible polymer blends of polycarbonate and polypropylene prepared by twin-screw extrusion," Polymer 32, 1474-1481 (1991).
Flumerfelt, R. W., "Drop breakup in simple shear fields of viscoelastic fluids," Ind. Eng. Chem. Fundam. 11, 312-318 (1972).
Gauthier, F., H. L. Goldsmith, and S. G. Mason, "Particle motion in non-Newtonian media. II: Poiseuille flow," Trans. Soc. Rheol. 15, 297-330 (1971).
Grace, H. P., "Dispersion phenomena in high viscosity immiscible fluid systems and application of static mixers as dispersion devices in such systems," Chem. Eng. Commun. 14, 225-277 (1982).
Grizzutti, N. and O. Bifulco, "Effects of coalescence and breakup on the steady-state morphology of an immiscible polymer blend in shear flow," Rheol. Acta 36, 406-415 (1997).
Lacroix, C., M. Bousmina, P. J. Carreau. B. D. Favis, and A. Michel, "Properties of PETG/EVA blends: viscoelastic, morphological and interfacial properties. Part I," Polymer 37, 2939-2947 (1996).
Lacroix, C., M. Grmela, and P. J. Carreau, "Relationships between rheology and morphology for immiscible molten blends of polypropylene and ethylene copolymers under shear flow," J. Rheol. 42, 41-62 (1998).
Lacroix, C., M. Grmela, and P. J. Carreau, "Morphological evolution of immiscible polymer blends in simple shear and elongational flows," J. Non-Newtonian Fluid Mech. 86, 37-59 (1999).
Levin, L., C. W. Macosko, and S. D. Pearson, "Influence of normal stress difference on polymer drop deformation," Polym. Eng. Sci. 36, 1647-1655 (1996).
Lyngaae-Jorgensen, J. and L. A. Utracki, "Dual-phase continuity in polymer blends," Makromol. Chem., Macromol. Symp. 48/49, 185 (1991).
Mekhilef, N., B. D. Favis, and P. J. Carreau, "Morphological stability, interfacial tension, and dual-phase continuity in polystyrene-polyethylene blends," J. Polym. Sci., Part B: Polym. Phys. 35, 293-308 (1997).
Mekhilef, N., P. J. Carreau, B. D. Favis, P. Martin, and A. Ouhlal, "Viscoelastic properties and interfacial tension of polystyrene-polyethylene blends," J. Polym. Sci., Part B: Polym. Phys. (in press, 2000).
Mighri, F., P. J. Carreau, and A. Ajji, "Influence of elastic properties on drop deformation and breakup in shear flow," J. Rheol. 42, 1477-1490 (1998).
Minale, M., P. Moldenaers, and J. Mewis, "Effect of shear history on the morphology of immiscible polymer blends," Macromolecules 30, 5470-5475 (1997).
Minale, M., J. Mewis, and P. Moldenaers, "Study of the morphological hysteresis in immiscible polymer blends," AIChE. J. 44, 943-950 (1998b).
Minale, M., P. Moldenaers, and J. Mewis, "Transient flow experiments in a model immiscible polymer blend," J. Rheol. 43, 815-827 (1999).
Monticciolo, A., P. Cassagnau, and A. Michel, "Fibrillar morphology development of PE/PBT blends: Rheology and solvent permeability," Polym. Eng. Sci. 38, 1882-1889 (1998).
Scott, C. E. and C. W. Macosko, "Model experiments concerning morphology development during the initial stages of polymer blending," Polym. Bull. 26, 341-348 (1991).
Sundararaj, U., C. W. Macosko, A. Nakayama, and T. Inoue, "Milligrams to kilograms - An evaluation of mixers for reactive polymer blending," Polym. Eng. Sci. 35, 100-114 (1995).
Takahashi, Y. and I. Noda, "Immiscible plymer blends under shear flows," in Flow-Induced Structure in Polymers, edited by A. 1. Nakatami and D. Dadmun (American Chemistry Society, Washington, D.C., 1995), pp. 140-152.
Taylor, G. I., "The deformation of emulsions in definable fields of flow," Proc. R. Soc. London, Ser. A 146, 501-523 (1934).
Tsakalos, V., P. Navard, and E. Peuvrel-Disdier, "Deformation and breakup mechanisms of single drops during shear," J. Rheol. 42, 1403-1417 (1998).
Utracki, L. A. and Z. H. Shi, "Development of polymer blend morphology during compouding in a twin-screw extruder. Part 1: Droplet dispersion and coalescence - A review," Polym. Eng. Sci. 32, 1824-1833 (1992).
Vinckier, I., P. Moldenears, and J. Mewis, "Relationship between rheology and morphology of model blends in steady shear flow," J. Rheol. 40, 613-631 (1996).
Vinckier, I., P. Moldenears, and J. Mewis, "Transient rheological response and morphology evolution of immiscible polymer blends," J. Rheol. 41, 705-718 (1997).
Vinckier, I., P. Moldenears, A. M. Terracciano, and N. Grizzuti, "Droplet size evolution during coalescence in semiconcentrated model blends," AIChE. J. 44, 951-958 (1998).
