Correspondence between basic quantities and theoretical parameters

1 Correspondence between basic quantities and theoretical parameters 

The theoretical parameters which we need are the area S of the equivalent Brownian chain, and the parameter z. For polystyrene, the area S is given as a function of mass by eqn (15.2.12). On the other hand, z will be determined, either from swelling (the best method) or from the second virial coefficient. Let us emphasize, however, that this correspondence is only a very good approximation. 

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