Properties of the Terminal Zone Spectrum

The exponent b is a matter of some current dispute, being 2 in nearly all studies but appearing to range as high as 3 in a few instances (Section 5.4.4). In any case, the explicit molecular weight dependence is lost, and concomitantly the concentration dependence is increased (173). If all relaxation times had been scaled up by the same factor (the relative spacings and intensities of the Rouse spectrum being retained), the Rouse forms would have been preserved for M (Mc)soln. 

Recoverable shear after steady-state deformation lim [yr/oo] oC 

The steady-state compliance data have been analyzed in reduced form 

This form for reduced compliance is suggested by the dilute solution molecular theories, according to which JeR is governed by the dispersity of molecular relaxation times [from Eq. (4.12)]  

Variations in JeR at finite concentration reflect the influence of intermoleeular interaction on the relative spacings of the long relaxation times. Through JeR these effects may be examined separately from effects on the magnitude of the viscosity (or the average magnitude of the long relaxation times). The ratio Exf/(X T )2 is called S2/Sj by Ferry and co-workers. The above expression for JeR 

---