The monomer,
N-vinylpyrrolidone (VP, Alfa Aesar, Ward Hill, MA, USA), was purified by vacuum distillation to remove the NaOH inhibitor. Triethylene glycol dimethacrylate (TEGDM, Aldrich, St. Louis, MO, USA), poly(ethylene glycol) methyl ester methacrylate (PEGMMA, Aldrich),
1-decanethiol as a chain transfer agent (DT, Alfa Aesar), isopropyl alcohol (IPA, Khimmed, Moscow, Russia) of the extra purity grade as well as Na
2HPO
4 and NaH
2PO
4 were used without additional purification. The initiator, azobisisobutyronitrile (AIBN), was purified through its recrystallization from ethanol.
To study the sorption properties of polymer matrices, a hydrophilic dye, Rose Bengal sodium or Disodium 3,4,5,6-tetrachloro-2- (2,4,5,7-tetraiodo-6-oxido-3-oxoxanthen-9-yl) benzoate, Acid Red 94, (RB) (Alfa Aesar), was used without preliminary purification.
Kurmaz S.V., Fadeeva N.V., Gorshkova A.I., Kurochkin S.A., Knerelman E.I., Davydova G.I., Torbov V.I., Dremova N.N., Konev D.V., Kurmaz V.A., Ignatiev V.M, & Emelyanova N.S. (2021). Mesoporous Networks of N-Vinylpyrrolidone with (di)Methacrylates as Precursors of Ecological Molecular Imprinted Polymers. Materials, 14(22), 6757.