A micro method of determining the number average molecular weight (Mn) of PPS had been established

A AgCl-Ag2S Solid-film selective ion sensitive electrode was used to determine the molarity of chloride ion

after PPS was decomposed in an oxygen flask and the absorption solution was kept to a constant volume. The samples had not been fractionated

hence

the standard deviation between the parallel run was about ± 10%.The relationship between M

and melt viscosity of PPS at low shear rate is as follows.and the relationship between Mn and intrinsic viscosity of PPS is as follows

the unit of n and [n] is in poise and ml/gm respectively.