Among other working groups that have studied the degradation process of cellulose by DSC, one group found that degradation already starts at 220 °C, finishing at 475 °C with total mass loss of 97.6% . They related the pyrolysis onset temperature by DTA with the cellulose crystallinity index citing the publication of Ciolacu and Popa, when the cellulose shows the lowest crystallinity index the degradation takes place at lowest temperature but the heating rate must be also considered . The solvent exchange treatment brought better thermal stability to AG20 starting its thermal degradation 25 °C higher than pristine cellulose.