Case of Reactive Ternary Blends

The addition of a third reactive polymer to immiscible polymer blends can be useful for morphology modulation. In immiscible PET/PE blends, a DEM-functionalized very low density polyethyle (VLDPE) was added as compatibilizer precursor in 

DEVELOPMENT AND STABILITY OF PHASE MORPHOLOGY IN COMPLEX MULTICOMPONENT POLYMERIC SYSTEMS 

This goal can be reached by using a nonreactive polymer P as a third component, which is able to develop an interfacial tension y with the two immiscible polymers so as to fulfill Equation 22.7, written by applying Equation 22.1 to this specific case. 

Moreover, the viscosity ratio rjpirjpgj- should be less than 1 to favor the encapsulation of PET with P nonreactive polymer [75]. The poly(styrene- -ethylene-butylene-fe-styrene) triblock copolymer (SEES) shows these two characteristics in PET matrix hosting PE-dispersed phase. [76] If polyethylene is the matrix, only the former condition is respected. When the polymer P is reactive, the encapsulation of the dispersed phase was observed in different compositions of PA6/PP blends [72,73] and of PET/PP blends.[74] 

In the ternary blends having almost equal amount of PA6, PP, and PS (i.e., composition of 40PA/30PP/30PS), a 

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