Apparent activation energies (E) of three components were calculated in
recommended range of ∈[0.05,0.95] with a step-size of 0.05(Vyazovkin et al., 2011),
which were selected using cubic spline interpolation method. The fitting lines of
Friedman method for each conversion point were showed in FigS.2. E values of
P-HC, PCL, and P-LG calculated from slopes of these lines were exhibited in Fig.4.
The absolute deviation (, %) generated by E variation to average value (E0) of P-HC
and P-CL was smaller than 30% (Fig.4(D)), which demonstrated the E were stable.
However, values P-LG were very large even higher than 30% in conversion ranges
of 0.05-0.40 and 0.80-0.95. Apparent activation energy E0 (175.6kJ/mol) of P-HC was
similar to the reported data which had a range of 169.7-186.8 kJ/mol (Cai et al., 2013).