Journal of Materials Science

, Volume 43, Issue 5, pp 1745–1748 | Cite as

Viscoelasticity and macromolecular topology in single-site catalyzed polyethylene

  • Juan F. VegaEmail author
  • Dorian Polo-Cerón
  • Santiago Gómez-Ruíz
  • Sanjiv Prashar
  • Mariano Fajardo
  • Javier Martínez-Salazar


The relationship between polymer chain topology, i.e. long chain branching (LCB), and rheological properties in polyolefins obtained using single-site catalysts has been the topic of major scientific activity since the late 1990s [ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14]. Indeed, melt-state rheological measurements are being considered as one of the most sensitive methods for detecting sparse LCB in polyethylene (PE) [ 1, 15]. For example the flow activation energy, E a, related to the temperature dependence of viscoelastic properties, is altered by the presence of LCB, and the cross-point frequency between storage and loss moduli, ω x, and the cross-point modulus, G x, are also very sensitive features to the molecular architecture [ 16, 17, 18]. In this context, the study of these properties can give us information about the relationship between polymer chain topology and catalyst structure. In this work, a set of PE samples was synthesized using different metallocene...


Metallocene Catalyst Irganox 1010 Long Chain Branch Flow Activation Energy Linear Viscoelastic Regime 



J.F. Vega acknowledges the Ministerio de Educación y Ciencia (MEC), Spain, for a Ramón y Cajal Tenure (2006). We would like to thank the MEC (Projects MAT2006-0400 and CTQ2005-07918-C02-02/BQU), the Comunidad de Madrid (Project S-0505/PPQ-0328), and the Universidad Rey Juan Carlos (graduate fellowship for D. Polo-Cerón) for financial support.


  1. 1.
    Vega JF, Santamaría A, Muñoz-Escalona A, Lafuente P (1998) Macromolecules 31:3639CrossRefGoogle Scholar
  2. 2.
    Vega JF, Fernández M, Santamaría A, Muñoz-Escalona A, Lafuente P (1999) Macromol Chem Phys 200:2257CrossRefGoogle Scholar
  3. 3.
    Aguilar M, Vega JF, Sanz E, Martinez-Salazar J (2001) Polymer 42:9713CrossRefGoogle Scholar
  4. 4.
    Malmberg A, Kokko E, Lehmus P, Löfgren B, Seppälä J (1998) Macromolecules 31:8448CrossRefGoogle Scholar
  5. 5.
    Malmberg A, Liimatta J, Lehtinen A, Löfgren B (1999) Macromolecules 32:6687CrossRefGoogle Scholar
  6. 6.
    Kokko E, Malmberg A, Lehmus P, Löfgren B, Seppälä JV (2000) J Polym Sci: Polym Chem 38:376CrossRefGoogle Scholar
  7. 7.
    Kokko E, Pietikäinen P, Koivunen J, Seppälä JV (2001) J Polym Sci: Polym Chem 39:3805CrossRefGoogle Scholar
  8. 8.
    Kokko E, Wang W-J, Seppälä JV, Zhu S (2002) J Polym Sci: Polym Chem 40:3292CrossRefGoogle Scholar
  9. 9.
    Gabriel C, Kokko E, Löfgren B, Seppälä J, Münstedt H (2002) Polymer 43:6383CrossRefGoogle Scholar
  10. 10.
    Malmberg A, Gabriel C, Steffl T, Münstedt H, Löfgren B (2002) Macromolecules 35:1038CrossRefGoogle Scholar
  11. 11.
    Wood-Adams PM, Dealy JM (2000) Macromolecules 33:7481CrossRefGoogle Scholar
  12. 12.
    Wood-Adams PM, Dealy JM, Degroot AW, Redwine OD (2000) Macromolecules 33:7489CrossRefGoogle Scholar
  13. 13.
    Wood-Adams P, Costeux S (2001) Macromolecules 34:6281CrossRefGoogle Scholar
  14. 14.
    He C, Costeux S, Wood-Adams P (2004) Polymer 45:3747CrossRefGoogle Scholar
  15. 15.
    Piel C, Stadler FJ, Kaschta J, Rulhoff S, Münstedt H, Kaminsky W (2006) Macromol Chem Phys 206:26CrossRefGoogle Scholar
  16. 16.
    Utracki LA, Schlund B (1987) Polym Eng Sci 27:367CrossRefGoogle Scholar
  17. 17.
    Vega J, Aguilar M, Peón J, Pastor D, Martínez-Salazar J (2002) e-polymers 042:1Google Scholar
  18. 18.
    Vega JF (2003) Recent Res Dev Macromol 7:29Google Scholar
  19. 19.
    Gómez-Ruiz S, Prashar S, Sánchez-Barba LF, Polo-Cerón D, Fajardo M, Antiñolo A, Otero A, Maestro MA, Pastor CJ (2007) J Mol Catal A: Chem 264:260CrossRefGoogle Scholar
  20. 20.
    Polo-Cerón D, Gómez-Ruiz S, Prashar S, Fajardo M, Antiñolo A, Otero A, López-Solera I, Reyes ML (2007) J Mol Catal A: Chem 268:264CrossRefGoogle Scholar
  21. 21.
    Polo-Cerón D, Gómez-Ruiz S, Prashar S, Fajardo M, Antiñolo A, Otero A (2007) Collect Czech Chem Commun 72:742CrossRefGoogle Scholar
  22. 22.
    Vega JF, Aguilar M, Martínez-Salazar J (2003) J Rheol 47:1505CrossRefGoogle Scholar
  23. 23.
    Cox WP, Merz EH (1958) J Polymer Sci 28:619CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Juan F. Vega
    • 1
    Email author
  • Dorian Polo-Cerón
    • 2
  • Santiago Gómez-Ruíz
    • 2
  • Sanjiv Prashar
    • 2
  • Mariano Fajardo
    • 2
  • Javier Martínez-Salazar
    • 1
  1. 1.Departamento de Física MacromolecularInstituto de Estructura de la Materia, CSICMadridSpain
  2. 2.Departamento de Química Inorgánica y AnalíticaE.S.C.E.T., Universidad Rey Juan CarlosMóstoles (Madrid)Spain

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