Each kind of sample was about0.5 g and was heated from 30◦C to 300◦C at heating rates of0.1◦C min−1, 0.2◦C min−1, 0.5◦C min−1and 1.0◦C min−1, respec-tively. Furthermore, in order to examine the effect of the highpressure atmosphere control panel, these three samples weretested in the C80 micro-calorimeter without connecting this panel