Abstract
In previous publications, values of reaction order ( n) were estimated for “ n-type ” unimolecular or pseudo-unimolecular decompositions without the need for any initial determination of activation energy ( E) [1–5]. The procedures described involved the estimation of slopes of TG curves ( RT) at various degrees of conversion (α) and corresponding temperatures ( T, K) [data from DTA (and DSC) traces can also be readily utilized]. Then values of n could be determined directly by graphical procedures [2–4] or indirectly by iterative methods [5]. The aim of this paper is to extend previously reported procedures so that the value of n can now be determined directly by means of cubic equations which use data from TG or DTA (or DSC) traces.
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