Apparent slip at a polymer-polymer interface

  • J.L. Goveas
  • G.H. Fredrickson


We consider a planar interface between strongly-segregated homopolymers subjected to steady shear in the plane of the interface. We develop a constitutive equation for stress relaxation in an inhomogeneous system for chains obeying Rouse dynamics. Using this equation, the interfacial viscosity for a symmetric blend is found to be \(\zeta {b^2}/(6x{\upsilon _0})\) in agreement with a scaling prediction due to de Gennes, where \(\zeta \) is the bead friction coefficient, b is the segment length, υ is the segment volume and χ is the Flory-Huggins interaction parameter driving the phase separation. We generalize our results to asymmetric blends and describe a phenomenological extension to entangled melts.

PACS. 83.50.Lh Interfacial and free surface flows; slip - 83.80.Es Polymer blends 


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Copyright information

© EDP Sciences, Springer-Verlag 1998

Authors and Affiliations

  • J.L. Goveas
    • 1
  • G.H. Fredrickson
    • 2
  1. 1.Materials Research LaboratoryUniversity of CaliforniaSanta BarbaraUSA
  2. 2.Department of Chemical EngineeringUniversity of CaliforniaSanta BarbaraUSA

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