Kinetic Features of the Homopolymerisation of 2-Hydroxyethyl Methacrylate in Various Media

Reaction Medium and Kinetics of (Co)Polymerisation of N-Vinyl-3(5)-Methylpyrazole

“…The positioning of the monomers AA and HOEMA in this order of activity is also justifi ed in view of the fact that, in a study of the binary copolymerisation of HOEMA with AA in an aqueous solution in the presence of an AP-AscA initiating system, it was shown that HOEMA has higher activity than AA, as indicated by the values of the copolymerisation constants [33]:…”

“…As was the case during the copolymerisation of VMP with VA, an induction period is observed. In reactions of copolymerisation with N-vinyl compounds, HOEMA exhibits high reactivity [31][32][33]. This is observed when the reaction is carried out with VMP: an increase in the rate of the reaction from 2.2 × 10 -4 to 2.8 × 10 -4 mol/l s is noted with reduction in the content of the less active monomer VMP from 0.75 to 0.25 mole fractions, and the composition of the copolymer is enriched with HOEMA units by comparison with the composition of the initial monomer blend ( Table 4).…”

Theoretical and Practical Aspects of the Synthesis of Medical Polymers Based on N-Vinylsuccinimide in Aqueous Media

“…The kinetic dependences obtained in a study of the kinetics of polymerisation of 2-hydroxyethyl methacrylate (HOEMA) in water in the presence of the AP-AscA initiating system are particularly close [45]. Of course, monomers of different chemical nature exhibit difference activities in polymerisation reactions.…”

“…The activation energy of the polymerisation of VSI in the temperature range 25-40°C amounts to 38.2 kJ mol -1 [40], and for the polymerisation of HOEMA in argon this value amounts to 40.1 kJ mol -1 [45].…”

“…Analysis of the effect of change in the concentration of the components of the reaction mixture on the values of the molecular weight of VSI polymers obtained in water in the presence of the AP-AscA initiating system showed a considerable difference from the results of investigations using acrylic monomers [43,45,46]. Whereas in reference [43] it was noted that change in the concentration of AscA hardly affected the molecular weight of poly-2-hydroxyethyl methacrylate, and this was attributed to the same factors as the absence of any influence of the AscA concentration on the polymerisation rate, in the study of the polymerisation of VSI it was noted that, although change in the AscA concentration has less influence on the molecular weight of PVSI than change in the monomer or AP concentration (see Table 1), it is nevertheless extremely important.…”