Kissinger-Akahira-Sunose

Kinetic analysis according to the model-free approach by Kissinger-Akahira-Sunose [25, 26] was performed with the computer program Excel. For kinetic analysis according to the advanced Vyazovkin method [27], the STAR software... 

Figure 2. (a) Activation energy Ea for KLPF resin estimated by the advanced Vyazovkin method (VA, ) and by the Kissinger-Akahira-Sunose method (KAS, O). (b) Conversion a in % over time for KLPF at 160°C. Comparison of the isothermal experiment (—) with curves calculated with the VA ( ) and with the KAS (O) methods. 

The calculation of the activation energy is based on multiple scan methods where several measurements at different heating rates are needed, i.e. the iso-conversion methods the Ozawa-Flynn-Wall method, the Kissinger-Akahira-Sunose method and the expanded Friedman method. The first two are described in Section 3.3.1. The expanded Friedman method is expressed in the form... 

Use of another asymptotic approximation for the temperature integral yielded the following equation, known as the Kissinger-Akahira-Sunose (KAS) equation [25, 26] ... 

Kissinger, Akahira and Sunose (Kissinger, 1957 Ozawa, 1%5 Augis Bennett, 1978 Boswell, 1980 Flynn Wall, 1966 Akahira Sunose, 1971) used the approximation given by Coats Redfern (Coats Redfern, 1964) to evaluate the integral in the rate Eq. (4). KAS method is based on the expression... 

---