Correlation Between Morphology and Mechanical Properties

What is the mechanism behind the coalescence phenomenon in the latter stages of extmsion in reactive blends Based on the above experimental evidence, Majumdar et al. 

This study shows that some of the same factors, which are intuitively believed to increase the efficiency of mixing in polymer blends, could have an opposite effect on reactively compatibilized blends where the dispersed phase is more finely dispersed. More intensive mixing, after die minimum particle size has been attained, can lead to coalescence of the dispersed phase particles to form significandy larger domains. This is particularly so, if the compatibilizer has a tendency to leave the interfaces under intensive shear. 

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