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Rheological and energetic considerations of the fluid dynamics and scale‐up of mixing small particles into polymer melts in an internal mixer
Author(s) -
White James Lindsay
Publication year - 1979
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760191111
Subject(s) - dimensionless quantity , materials science , viscoelasticity , rheology , mixing (physics) , scaling , polymer , mechanics , strain hardening exponent , hardening (computing) , thermodynamics , composite material , physics , geometry , mathematics , layer (electronics) , quantum mechanics
A basic theoretical investigation is made of the fluid mechanics of mixing of particulates into a polymer melt in an internal mixer. It is shown how increasing levels of viscoelasticity, especially with non‐linear, strain rate hardening character, should deteriorate mixing. he characteristics of internal mixers are discussed in terms of dimensionless groups. Rational scaling procedures based on considerations of viscoelastic fluid mechanics and energy balances are critically investigated and their limitations considered.