Table shows that all formulations that pass the V0 test exhibit higher Tign values than PP without the FR additive. This suggests that if threshold temperature must be around 580 oC or above to obtain good fire retardancy of the materials. All formulations containing HFFR additive show lower activation energies than virgin PP, but it is obvious that all compounds that contain FR and pass V0 classification show higher activation energies. The presence of PFR additives, as previously reported, may initiate degradation of materials at lower energies, triggering gas and condensed phase reactions. We observed a similar behaviour in the frequency factor for the virgin PP and flame retarded formulations. The small deviations that we have observed here in the UL-94V classifications may be due to uncertainties in the UL-94V tests, as discussed earlier. The results show that Tign and kinetic parameters from TGA/DTG measurements can be used to predict fire resistance properties of materials. To statistically confirm our results, we are collecting more such data on many more model formulations with different PFR types and their combinations.