Segment polymer, defined

Quite evidently, all states except leuco-emeraldine can be protonated. The states with no protonation are denoted as the "base" form, e.g. emeraldine base (which would be non-conductive). The reader may note tlie presence and alternation of "benzenoid" and "quinonoid" segments, as defined in an earlier Chapter, in the structures of Fig. 13-9. Upon protonation, the polymer is denoted as the salt, for example protonation of the emeraldine base form (Fig. 13-9c with HCl would yield emeraldine hydrochloride-. 

Each lattice site is defined to have z nearest neighbors, and 0i and 02 > respectively, can be used to describe the fraction of sites which are occupied by solvent molecules and polymer segments. The following inventory of interactions can now be made for the mixture ... 

The same effect happens inside a random flight chain where the close proximity of the polymer segments offers mutual screening from the bulk flow field. The idea of a chain being non-drained was first considered by Debye Bueche who introduced the concept of a shielding length defined as [46] ... 

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