Figure 4 .

TGA and DTG curves of normalized weight loss rate. (A) TGA and (B) DTG curves of normalized weight loss rate by the initial sample mass at a heating rate of 20 °C/min in air condition. Notes: T_i and T_max were the temperatures where 5 wt.% weight loss and maximum weight loss rate occurred , respectively. T_max was obtained from the peak of weight loss in DTG curves.