Statistical Conformation in Good Solvent

Statistical conformation in good solvent Yellow solution. 

In these first studies the samples were very polydisperse M /Mn = 5 to 8, and the discussion of the physical properties such as the internal conformation of the chain or the threshold for the gel formation were made without considering the polydispersity effect The molecular weight and mass distribution depends drastically from the way the sample is prepared. Because the polymer grows in monomer single crystal, a Shulz-Flory distribution does not necessarily occur. The size and the polydispersity are very 

The varying parameter is the statistical length, or equivalently, the numbo of monomer units within a statistical length b/a = n. The best fit was obtained with n = 80 corresponding to b= 400 A. This value was the first non ambiguous result describing the 

ILS experiments indicate a semi-rigid behavior for the PDA chains. Therefore we can expect to observe the form factor of the Porod-Kratky chain. More precisely, the q scattering behavior of a rod like molecule should be measured since the normalize form factor P( of an infinitely long worm-like chain has the asymptotic form  

In figure 5 is reported the structure factor normalized to the degree of polymerization Nw  

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