They were distributed in the range of 0.8 104–1 104 g/mol with 12.08%, 29.95% and 16.24%, respectively.
Comparatively, the range of molar mass from 2 104 to 3 104 g/mol only accounted for 5.59–7.27%, and less 7% of molecules was distributed in the range higher than 3 104 g/mol