Part II of the publication describes a model for calculating the muelting of polymer blends which has been implemented in the SIGMA simulation software for the design of co-rotating twin screw extruders.The model is based on the findings discussed in Part I and makes it possible to calculate the temperature progression in the solids conveying section and during the subsequent melting process for binary incompatible polymer combinations.The two material components are observed in parallel during the melting process,and the respective degrees of melting over the length of the screw are calculated.The properties of the melt phase, which forms from both components,are calculated with mixing rules implemented in the program. The calculations supply the melting profiles for both components,thereby permitting a comprehensive analysis of the melting of binary polymer combinations.The results additionally form the basis of a calculation to estimate the mor-phology development of polymer blends in the melting section of the extruder.
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