Migration in Polyacetylene and Polyparaphenylene

Simulation results show a high mobility of ions in PAc only for those ions in the channels. But since doped polymer samples are heterogeneous, obviously we cannot pretend that this description of dopant motion applies throughout the sample. The overall diffusion in the sample is, however, controlled by the slowest step, which it is therefore important to try to find. Now we must remember that  

Taken together these facts imply that dopant ions encounter a significant degree of nonchannel environment during the migration through the sample, and they raise 

Simulations reveal structural interactions between the migrating dopant ion and the host lattice in which polymer chains respond to the migrant by distorting from planarity. As would be expected, this interaction increases rapidly with the flexibility of the chains. In Section 6.2 we see that in nonconjugated polymers (i.e., those with no n electronic component to favor chain planarity), the host dopant interaction plays an essential role in the jump mechanism in migration. 

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