Abstract
The aim of the study is to search for a reaction that provides the possibility of tandem “one-pot” formation of polymer networks during radical copolymerization of N-vinyl-2-pyrrolidone and glycidyl methacrylate. It was shown that the addition of recently synthesized 1,3-dimethylimidazolium (phosphonooxy-)oligosulfanide makes it possible to obtain a cross-linked copolymer in one stage as a result of radical copolymerization of N-vinyl-2-pyrrolidone and glycidyl methacrylate with a molar ratio of monomers less than 1.4. The structure of the copolymerization products of N-vinyl-2-pyrroldione and glycidyl methacrylate formed in the presence of 1,3-dimethylimidazolium (phosphonooxy-)oligosulfanide was characterized by 1H NMR, FTIR and MALDI spectroscopy. 1H NMR spectroscopy revealed an interaction under moderate heating between glycidyl methacrylate and 1,3-dimethylimidazolium (phosphonooxy-)oligosulfanide, accompanied by the formation of a mixture of unsaturated products of complex structure, presumably acting as crosslinking agents. It is shown that when the molar ratio of N-vinyl-2-pyrroldione/glycidyl methacrylate comonomers is 0.89, a densely crosslinked copolymer is formed, capable of limited swelling in water with a velocity constant of 5.06 × 10−2 min−1 and an equilibrium degree of swelling of about 227%.
Highlights
Poly(N-vinyl-2-pyrrolidone) is one of the water-soluble polymers promising for the creation of adhesive compositions [1], wastewater treatment systems [2,3] and drug delivery [4,5,6]
Since three-dimensional polymer networks are formed as a result of the “one-pot”
Radical copolymerization of VP and GMA initiated by Azobisisobutyronitrile (AIBN) in the presence of POOS at 348 K, the reaction of GMA and POOS was investigated at first
Summary
Poly(N-vinyl-2-pyrrolidone) is one of the water-soluble polymers promising for the creation of adhesive compositions [1], wastewater treatment systems [2,3] and drug delivery [4,5,6]. The crosslinking of poly(N-vinyl-2-pyrrolidone) under the influence of high-energy radiation can lead to the parallel development of the radiation destruction process, and the use of polyunsaturated crosslinking agents creates difficulties in cleaning hydrogels. Another approach to the crosslinking of chains and the formation of hydrogels is the copolymerization of N-vinyl2-pyrrolidone with monomers containing reactive functional groups, for example, epoxy group [23]. In this case, the formation of hydrogels containing hydrophilic residues of
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