and w i is the initial weight, w t is the weight of the sample at the particular time t, and w f is the final weight. Here, t is the half-life (t 1/2 ) of a reaction, which is the time in which the concentration of a reactant is reduced to one half of its initial concentration . Both k and t1/2 are disclosed in Table , along with activation energy (E a ), change in entropy (∆S), change in enthalpy (∆H), and change in Gibbs free energy (∆G). Slope of the line (k) per phase transformation: first degradation, second degradation, and residue yield were also disclosed in Figure ) with b-intercept and proportion of variance (R 2 ).