Viscosity Ratio and Surface Tension

The viscosity ratio (%/r/n,) between the matrix (subscript m) and the domain (subscript d), and surface tension tt play very important roles in the determination of droplet size. The minimum domain size d obtained by mixing is expressed by the following equation [15]  

To develop and stabilize the optimum morphology of a polymer alloy, it is very important to utilize a particular interfacial chemical reaction or a pre-designed compati-bilizer to improve the surface tension or interaction between the domain and matrix polymeric components, as well as to select of the optimum operational conditions for mixing [17, 20, 21]. For operating conditions, the larger the JV or lF -value (that is, higher shear rate) becomes, the smaller the domain size which can be obtained. 

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