Abstract
The use of linear correlation coefficients to ascertain mechanism from TG data was shown to be unsatisfactory. This is in agreement with results reported by others who also indicated the necessity of using additional isothermal techniques for determining mechanism. Two methods, Reich—Stivala (R—S) and double-log (D-L), were employed to distinguish one mechanism from among 15 theoretical possibilities for heterogeneous solid-state reactions using theoretical TG data. With a certain degree of accuracy of TG data and for relatively large E/RT values (above 18), the R—S method was shown to be superior to the D-L method and a good indicator of a most probable mechanism. In this respect, the utilization of supplemental isothermal techniques may not be necessary when the R—S method is used under certain conditions.
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