The cumulative weight fractions at different molar mass ranges
of the three samples are shown in Fig. 1. GP-LRS3, MP-LRS3 and
UP-LRS3 presented molar mass distributions with a fraction of
86.61–89.82% in the ranges lower than 2 104 g/mol, respectively.
They were distributed in the range of 1 104–2 104 g/mol
and accounted for 67.69%, 47.87% and 69.26% of the total LRS3,
respectively.