Mathematical modeling of melting of polymers in a single-screw extruder a critical review

Deterministic mathematical models of the Maddock melting mechanism based on analytical and finite-difference solution methods are surveyed and classified according to the key assumptions involved. It has been concluded that the rigid solid bed concept coupled with a consistent non-Newtonian analysis of the melt flow pattern, including cross-channel circulation, leads to superior results. It is suggested that the development of the melting theory for the Maddock mechanism as an engineering analytical tool is virtually complete.