Matches in SemOpenAlex for { <https://semopenalex.org/work/W1970502040> ?p ?o ?g. }
- W1970502040 endingPage "643" @default.
- W1970502040 startingPage "624" @default.
- W1970502040 abstract "There is considerable experimental evidence that the classical no-slip boundary condition of fluid mechanics is not always a valid assumption for the flow of high molecular weight molten polymers. In fact, molten polymers slip macroscopically at solid surfaces when the wall shear stress exceeds a critical value. Moreover, for linear polymers there exists a second critical wall shear stress value at which a transition from a weak to a strong slip occurs. These two modes of slip (weak and strong) are due to flow-induced chain detachment/desorption at the polymer/wall interface and to chain disentanglement of the polymer chains in the bulk from a monolayer of polymer chains adsorbed at the interface. In this review, the two physical mechanisms of slip are discussed and validated on the basis of published experimental data. The slip velocity of molten polymers is a complex function and has been reported to depend on wall shear and normal stresses, temperature, and molecular characteristics of polymers (molecular weight and its distribution). Proposed slip models, static and dynamic, are also reviewed and their significance on the rheology and flow simulations of molten polymers is discussed." @default.
- W1970502040 created "2016-06-24" @default.
- W1970502040 creator A5016858149 @default.
- W1970502040 date "2012-04-01" @default.
- W1970502040 modified "2023-10-14" @default.
- W1970502040 title "Wall slip of molten polymers" @default.
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