Porod constant/parameter

Since all the parameters on the righthand side of this expression should be constant with activation, except for (j)s. the value of the Porod invariant should follow the behavior of < >s(l- s)- Thus, division of the scattering intensities by this factor can be used to correct for the variation of ( )s. It is emphasized, however, that this is only an approximation for a number of reasons, including the fact that when l(q) varies with q to an exponent less than -2 (as at high q for the current data), the integral diverges [3], and accurate values of the Porod invariant cannot be obtained. 

We now focus on the behavior of the mixture as a.function of T at constant overall composition in order to compare the predictions of the model with the results of the experimental study. Specifically, we consider the trajectory paths I and II indicat( d iu Fig. 4.18, which corro.s] )ond to the mass fi actions w chosen in the experimental study. Schemmel et al. [106] showed that along these trajectories the Porod parameter Ip (see Seepon 4.8.1) does not change with temperature, whicli indicates that the mean composition of the mixture in the pore stays constant for all temperatures. 

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