I am synthesizing Poly(silylether)s (PSEs). I am getting low Mn: 900g/mol. However, in this article (ACS Sustainable Chem. Eng. 2018, 6, 2491−2497) they reported 11000g/mol. I purified monomers but it did not work. I can not figure out where is the problem. Could you please help me on this issue. is it related to GPC device, column, method, solvent,...?