Heterogeneous composition polymers

Conducting Polymer Blends, Composites, and Colloids. Incorporation of conducting polymers into multicomponent systems allows the preparation of materials that are electroactive and also possess specific properties contributed by the other components. Dispersion of a conducting polymer into an insulating matrix can be accompHshed as either a miscible or phase-separated blend, a heterogeneous composite, or a coUoidaHy dispersed latex. When the conductor is present in sufftcientiy high composition, electron transport is possible. 

Glockner, G. Analysis of Compositional and Structural Heterogeneitis of Polymer by Non-Exclusion HPCL. Vol. 79, pp. 159—214. 

Analysis of Compositional and Structural Heterogeneities of Polymers by Non-Exclusion HPLC... 

In the preparation of simultaneous networks, it is important to control both polymerizations rates. Systems with inorganic condensation rates much faster than the organic polymerization rates turn into brittle hybrids that shrink. The polymer content is low due to evaporation of unreacted monomer. Systems with fast organic polymerization rates usually show uncontrolled polymer precipitation leading to heterogeneous composites. In practice, the kinetics of polymerization are difficult to control, so the success of the simultaneous approach rests on the careful selection of the monomers and their composition. 

We can see that electronic conduction, ionic conduction and conduction in heterogeneous composites are all important in their own way in polymers, but they form three quite distinct subjects, and the latter two forms of conduction will therefore be treated separately in Chapter 8. Here we will discuss the basic models of electronic conduction in solid polymers. Materials will be discussed in the later chapters. 

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