Zhang, Xiao-qian published the artcileCationic polymerization of p-methylstyrene in ionic liquids media, Related Products of imidazoles-derivatives, the publication is Gaofenzi Xuebao (2019), 50(4), 375-383, database is CAplus.
In this study, cationic polymerization of p-methylstyrene (p-MeSt) was studied in ionic liquid (IL) reaction media. The effects of ILs on p-MeSt cationic polymerization were analyzed through d. functional theory (DFT) and exptl. method. The influences of various initiating systems on p-MeSt cationic polymerization were investigated, and the efficiencies of various ILs as reaction solvents were discussed. The structure of the polymerization product was characterized through 1H-NMR and FTIR characterization analyses; number-average mol. weight (Mn) and mol. weight distribution were measured through gel permeation chromatog. (GPC); a temperature recorder tracked the relationship between polymerization system temperature variation and reaction time. The results showed that a CumOH (2-phenyl-2-propanol)/BF3·OEt2 initiating system is relatively effective in IL media over those frequently used in cationic polymerization reactions. The products polymerized in 1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl) imide ([Bmim][NTf2]) IL media have higher mol. weight and yield (up to 99%) and narrower mol. weight distribution (Mw/Mn is ∼ 2.0) than those in traditional mol. solvents (such as CH2Cl2). An anal. of the effects of ILs on polymerization indicated that ILs act as inert solvents in p-MeSt cationic polymerization and do not directly participate in the polymerization reaction. The ionic environment of IL cannot inhibit a chain transfer reaction completely, but can stabilize active species and disperse pos. charges. Thus, the polymerization reaction is milder in IL media than that in traditional mol. solvents. The results of IL recovery and reuse showed that these solvents can be used as reaction medium over a number of cycles without remarkable influence on the products. Finally, the corresponding elementary reaction mechanism of the cationic polymerization of p-MeSt initiated by the CumOH/BF3·OEt2 system in [Bmim][NTf2] IL media was proposed in this study. As is known, ILs are recyclable and environmentally friendly green solvents. This study expands the reaction solvent of cationic polymerization and promotes the development of green chem.
Gaofenzi Xuebao published new progress about 862731-66-6. 862731-66-6 belongs to imidazoles-derivatives, auxiliary class Ionic Liquid, name is 1-octyl-3-methylimidazolium bis((trifluoromethyl)sulfonyl)imide, and the molecular formula is C18H28B2O4, Related Products of imidazoles-derivatives.
Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem