Abstract
The finitely extensible nonlinear elastic (FENE) dumbbell model used earlier for dilute polymer solutions may also be used for concentrated solutions and melts if the Brownian motion and hydrodynamic forces acting on the beads are made nonisotropic. This corresponds roughly to imagining that a dumbbell is constrained to move within a capsule-shaped region embedded in the surrounding fluid. The constitutive equation obtained (a modified convected Maxwell model) contains four parameters: σ and β specify the extent of anisotropy in Stokes' law and in the Brownian motion forces respectively; λ is a time constant; and b describes the finite extensibility of the dumbbell. When σ and β are set equal to unity, the dilute-solution constitutive equation is recovered. In this sense the molecular theory given here permits a description of polymeric liquids over the entire concentration range.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
