Preview

Fine Chemical Technologies

Advanced search

Effect of interface mobility on coalescence of the dispersed phase domains upon processing of 20/80 EPDM/PP melt blends

Abstract

The effect of crosslink density (Nc) of the inner EPDM rubber phase on the coalescence of its domains during capillary extrusion of 20/80 EPDM/PP blends has been studied. The EPDM phase was preliminary loaded with varying amounts of vulcanization agents followed by the reactive blending with PP matrix on a roll mill at 185 o C. The samples were extruded through a capillary rheometer at 185 o C. It is demonstrated that even at low shear rate the convergent flow results in strong coalescence efficacy of droplets in raw blends and in complete suppression of coalescence at low Nc.

About the Authors

I Ster
M.V. Lomonosov Moscow State University of Fine Chemical Technologies, 86, Vernadskogo pr., Moscow 119571
Russian Federation


Yu. P. Miroshnikov
M.V. Lomonosov Moscow State University of Fine Chemical Technologies, 86, Vernadskogo pr., Moscow 119571
Russian Federation


References

1. Mackay, G.D.M. Some effects of interfacial diffusion on the gravity coalescence of liquid drops / G.D.M. Mackay, S.G. Mason // J. colloid sci. – 1963. – Vol. 18. – P. 674.

2. Charles, G.E. The coalescence of liquid drops with flat liquid/liquid interfaces / G.E. Charles, S.G. Mason // J. colloid sci. – 1960. – Vol. 15. – Р. 206.

3. Allan, R.S. Particle motions in sheared suspensions XIV. Coalescence of liquid drops in electric and shear fields / R.S. Allan, S.G. Mason // J. colloid sci. – 1962. – Vol. 17. – Р. 383.

4. Bartok, W. Particle Motions in Sheared Suspensions. VIII. Singlets and Doublets of Fluid Spheres / W. Bartok, S.G. Mason // J. colloid sci. – 1959. – Vol. 14, № 1. – Р. 13.

5. Roland, C.M. Shear induced coalescence in two phase polymeric systems / C.M. Roland, G.G.A. Bohm // J. polym. sci. polym. phys. ed. – 1984. – Vol. 22, № 1. – Р. 79.

6. Janssen, J. Ph.D. Thesis: «Dynamics of liquid-liquid mixing». / J. Janssen. – Eindhoven, The Netherlands. : Eindhoven University of Technology, 1993. – 118 p.

7. Elmendorp, J.J. A study on blending microrheology: Part IV. The influence of coalescence on blend morphology origination / J.J. Elmendorp, A.K. Van der Vegt // Polym. eng. sci. – 1986. – Vol. 26, № 19. – P. 1332.

8. Schoolenberg, G.E. Coalescence and interfacial tension measurements for polymer melts: experiments on a PS-PE model system / G.E. Schoolenberg, F. During, G. Ingenbleek // Polymer. – 1998. – Vol. 39, № 4. – P. 765.

9. Guido, S. Binary collisions of drops in simple shear flow by computer-assisted video optical microscopy / S. Guido, M. Simeone // J. fluid mech. – 1998. – Vol. 357, № 1. – P. 1.

10. Grizzuti, N. Effects of coalescence and breakup on the steady-state morphology of an immiscible polymer blend in shear flow / N. Grizzuti, O. Bifulco // Rheol. acta. – 1997. – Vol. 36, № 3. – P. 406.

11. Grizzuti, N. Morphology evolution of immiscible polymer blends in shear flow / N. Grizzuti // Polym. eng. sci. – 1997. – Vol. .37, № 8. – P. 2061-2064.

12. Droplet size evolution during coalescence in semiconcentrated blends / I. Vinckier [et al] // AiChE J. – 1998. – Vol. 44, № 4. – P. 951.

13. Rheo-optical investigation of immiscible polymer blends / H. Yang [et al] // Polymer. – 1998. – Vol. 39, № 23. – P. 5731.

14. Milner, S.T. How copolymers promote mixing of immiscible homopolymers / S.T. Milner, H. Xi // J. Rheol. – 1996. – Vol. 40. – P. 663.

15. Van Gisbergen, J.G.M. Influence of electron beam irradiation on the microrheology of incompatible polymer blends: Thread break-up and coalescence / J.G.M. Van Gisbergen, H.E.H. Meijer // J. Rheol. – 1991. – Vol. 35, № 1. – P. 63.

16. Coran, A.Y. Rubber-thermoplastic compositions. Chlorinated polyethylene rubber – nylon compositions / A.Y. Coran, R. Patel // Rubber. chem. technol. – 1980. – Vol. 53, № 1. – Р. 141.

17. Abdou-Sabet, S. Morphology of Elastomeric Alloys / S. Abdou-Sabet, R.P. Patel // Rubber chem. technol. – 1991. – Vol. 64, № 5. – P. 769.

18. Канаузова, А.А. Получение термопластичных резин методом динамической вулканизации и их свойства. Тематический обзор / А.А. Канаузова, М.А. Юмашев, А.А. Донцов. – М. : ЦНИИтэнефтехим, 1985. – 66 с.

19. Донцов, А.А. Процессы структурирования эластомеров / А.А. Донцов. – М. : Химия, 1978. – 392 с.

20. Летучий, М.А. Компьютерный анализ морфологии многофазных смесей полимеров / М.А. Летучий, Л.Я. Клеппер, Ю.П. Мирошников // Высокомолек. соед. – 1999. – Т. A41, № 2. – С. 297. ibid : Polym. sci. Ser. A. – 1999. – Vol. 41, № 2. – P.195.

21. Мирошников, Ю.П. Об устойчивости волокон дисперсной фазы в расплаве смеси полимеров / Ю.П. Мирошников, А.М. Гольман, В.Н. Кулезнев // Коллоид. журн. – 1979. – T.41, № 6. – С. 1120.

22. Miroshnikov, Yu.P. Some ideas concerning blending mechanisms / Yu.P Miroshnikov // Proc. PPS Europ. Meeting, Sept. 25-28. 1995. – Stuttgart, Germany. – Abstract № 3.10.

23. О механизме специфического волокнообразования при течении расплавов смесей полимеров / М.В. Цебренко [и др.] // Коллоид. журн. – 1976. – Т. 38, № 1. – С. 200.

24. Ballenger, T.F. The development of the velocity field in polymer melts in a reservoir approaching a capillary die / T.F. Ballenger, J.L. White // J. Appl. polymer sci. – 1971. – Vol. 15, № 8. – Р. 1919.


Review

For citations:


Ster I., Miroshnikov Yu.P. Effect of interface mobility on coalescence of the dispersed phase domains upon processing of 20/80 EPDM/PP melt blends. Fine Chemical Technologies. 2007;2(4):60-65. (In Russ.)

Views: 310


ISSN 2410-6593 (Print)
ISSN 2686-7575 (Online)