Free‐radical solution copolymerization of the ionic liquid monomer 1‐vinyl‐3‐ethylimidazolium bromide with acrylonitrile

Abstract

Ionic liquid monomer 1-vinyl-3-ethylimidazolium bromide (ViEtIM þ Br À ) was first used to copolymerize with acrylonitrile (AN) successfully under various conditions. This was achieved with azobisisobutyronitrile as the initiator and dimethyl sulfoxide as the solvent. The kinetics of this copolymerization were studied. The values of the monomer apparent reactivity ratios were calculated by the Kelen-Tü dos method. The apparent reactivity ratios of ViEtIM þ Br À (r ViEtIMþBrÀ ) and AN (r AN ) were similar at polymerization conversions of less than 10% (r AN ¼ 0.954, r ViEtIMþBrÀ ¼ 0.976). The copolymers were obtained with high molecular weights and high hydrophilicities. The copolymers were characterized by 1 H-NMR, differential scanning calorimetry, and thermogravimetric analysis. These copolymers may be potentially useful in the preparation of precursor fibers and carbon fibers.

Facile synthesis of nitrogen-doped carbon–Pt nanoparticle hybrids via carbonization of poly([Bvim][Br]-co-acrylonitrile) for electrocatalytic oxidation of methanol

“…It is interesting that PB 1 A 12 shows nearly the same carbonization yield to that of pure PAN, indicating that the small molar ration of IL content can improve the carbonization yield of PB x A y . 37 Here we presume that the imidazolium ring groups may occur a dynamic cyclotrimerization reaction with nitrile groups, 28 which increased the carbonization yield of the copolymers. Similarly, the nitrogen content of the produced carbon materials improved with an increased molar ratio of AN.…”

Morphological Phase Behavior of Poly(RTIL)-Containing Diblock Copolymer Melts

“…Polymerized ionic liquids (poly(IL)s) are a relatively new class of charged polymers (typically cationic) that combine the unique thermal, chemical, and transport properties of ionic liquids (ILs) with the physical and mechanical properties of polymeric materials. The result is a macromolecular system implicitly suited for a range of valuable engineering applications, most notably those involving selective transport phenomena in energy and energy industry related technologies. − The predominance of the recent synthetic efforts to produce poly(IL)s have focused on repeat units containing charged imidazolium groups, ,− some of which have already shown considerable promise as membrane materials for CO 2 /light gas separations, , solid-state ion conductors, − and electrochemical devices. , Such target applications are predicated on exploiting the inherent CO 2 gas solubility, ion conductivity, and tunable amphiphilicity associated with the charged imidazolium species. However, true performance optimization in these applications requires an ability to tune not only the charge or gas molecule transport behavior but the mechanical properties as well.…”

High impact toughness of polyamide 6/poly (vinylidene fluoride) blends induced by an ionic liquid

“…This enables ionic liquids to be potential solvents to replace volatile organic solvents in fabricating novel materials [15][16][17][18][19][20][21]. It was reported that ionic liquids can act as efficient plasticizers for many polymers, such as poly (vinyl alcohol) [22] and poly (methyl methacrylate) [23].…”