Rheology of miscible polymer blends

In this chapter, we first present different types of phase behavior in polymer blends, followed by the experimentally observed rheological behavior of some miscible polymer blends. We then present molecular theory for the linear viscoelasticity of miscible polymer blends and compare predictions with experimental results. We present the unresolved issue of determining the plateau modulus of miscible polymer blends. The rheological behavior of immiscible polymer blends will be presented in Chapter 11. 

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FIGURE 1.6 Logarithmic plot of G and G" versus aTto for some PVPh blends at different temperatures O = 74°C, A = 84°C, = 94 C, V = 104°C, 0 = 114°C, and O = 124°C. (Adapted from Yang Zhiyi. Rheology of miscible polymers blends with hydrogen bonding. Dissertation, University of Akron, Ohio 2007.)... 

Yang Zhiyi. Rheology of miscible polymers blends with hydrogen bonding. A dissertation presented to the graduate faculty of the university of Akron, August 2007. 

RHEOLOGY OF MISCIBLE POLYMER BLENDS 277 into (7.35) and integrating the resulting expression, one obtains... 

RHEOLOGY OF MISCIBLE POLYMER BLENDS 291 Table 7.5 Experimental doud point data for Problem 7.1... 

There are several factors that are either not included or assumed to be unimportant in the Stockmayer-Kennedy theory. Hydrodynamic interactions between two chains in a block copolymer are not included in the theory. This can be a serious omission, especially when dealing with low-molecular-weight diblock copolymers, such as the SI diblock copolymers considered above. Intermolecular (thermodynamic) interactions between chemically dissimilar chains are also neglected. Inclusion of such interactions can be important, especially when the chemical affinity between two chemically dissimilar chains is rather poor, such as the case in the SI diblock copolymers considered here. In Chapter 7, which discusses the rheology of miscible polymer blends, we pointed out the importance of the segmental interaction parameter in the prediction of the linear... 

Yang Z, Han CD (2008) Rheology of miscible polymer blends with hydrogen bonding. Macromolecules 41 2104-2118... 

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