Polymers, whose polarity is higher than that of DMF, are adsorbed by the packing materials of the OHpak SB-800 HQ columns. For such polymers, the use of the GPC KD-800 columns is recommended. On the other hand, for polymers having a lower polarity than that of DMF, the use of the SB-800 HQ columns is recommended.
Sample : Ethylene maleic anhydride copolymer
Columns : Shodex GPC KD-804 + KD-802.5, OHpak SB-805 HQ + SB-802.5 HQ
(8.0 mm I.D. x 300 mm each)
Eluent : 5 mM LiBr in DMF
Flow rate : 0.5 mL/min
Detector : Shodex RI
Column temp. : 25 °
