The evolution of the dielectric a relaxation and ionic conductivity with time t(r) during polymerization at 60 degreesC of mixtures of the diepoxide DGEBA, the diamine PALM, and the diluent Decalin (DEC) or di-n-butyl phthalate (DBP) has been studied using real-time dielectric relaxation spectroscopy (DRS). Data are presented as permittivity epsilon(omega ,t(r)) and impedance Z(omega ,t(r)). For c(dil) less than or equal to 20% (w/w), the main effect of diluent was to displace the a process to higher frequencies and, therefore, to increase the time required for glass formation over that for the unplasticized system. At higher values of c(dil), the behavior of epsilon(omega ,t(r)) for DGEBA/PACM/DBP systems was more complex as the properties became stationary at long times, showing that an elastomer rather than a glass was formed. The results are discussed in relation to the "floor temperature" T-F for reaction introduced previously. The same data are presented as Z(omega ,t(r)), which emphasizes changes in the ac ionic conductivity with time. As for the a data, qualitative differences are observed for the behavior of Z(omega ,t(r)) at low and high values of cdf. It is demonstrated that changes in molecular mobility with time for all systems can be judged by the behavior of epsilon(omega ,t(r)) but not by that of Z(omega ,t(r)) for these systems. The Fuoss-Kirkwood and KWW relaxation functions are used to express the half-width Delta log t of the plot of epsilon " vs log t(r) at fixed measuring frequencies for a reactive system. The changes in Delta log t with f and composition for the systems that became glasses are explained in terms of changes with time of (i) the width of the relaxation function and (ii) [Delta log < tau (alpha)>/Delta log t(r)], where < tau (alpha)> is the average relaxation time. The behavior of < tau (alpha)(t(r))> with time during reaction is considered in terms of the Angell fragility index m of the process. It is shown that (i) m increases during reaction for a given mixture and (ii) m, at fixed frequency, decreases as coil is increased.