Linear Melt Rheology of Pom-Pom Polystyrenes with Unentangled Branches

Van Ruymbeke, Evelyne;Kapnistos, Michael;Vlassopoulos, Dimitri;Huang, Tianzi;Knauss, Daniel M
(2007) Macromolecules — Vol. 40, n° 5, p. 1713-1719 (26 January) (2007)

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Authors
  • Van Ruymbeke, EvelyneUCLouvain
    Author
  • Kapnistos, MichaelFORTH Institute of Electronic Structure and Laser, Crete, Greece
    Author
  • Vlassopoulos, DimitriFORTH Institute of Electronic Structure and Laser, Crete, Greece
    Author
  • Huang, TianziColorado School of Mines
    Author
  • Knauss, Daniel MColorado School of Mines
    Author
Abstract
We measured the linear viscoelastic properties of a series of polystyrene melts with pom-pom architecture consisting of backbones ranging from marginally to well-entangled (of molecular weight Mb), endgrafted with q unentangled branches (Mbr) per backbone end. In this case, the branches relax very fast and act primarily as solvents for the backbone. Using a time-marching tube-based model, we showed that, in such a case only, the pom-pom polymer is equivalent to a blend of long (ML Mb + 2Mbr) and short (MS Mbr) linear chains with respective proportion (Mb + 2Mbr)/2(q - 1)Mbr.
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Van Ruymbeke, E., Kapnistos, M., Vlassopoulos, D., Huang, T., & Knauss, D. M. (2007). Linear Melt Rheology of Pom-Pom Polystyrenes with Unentangled Branches. Macromolecules, 40(5), 1713-1719 (26 January). https://doi.org/10.1021/ma062487n (Original work published 2007)