N-vinylpyrrolidone and ethoxyethyl methacrylate copolymer: Synthesis, characterization and reactivity ratios

  • S. Vijay Kumar
  • , T. E. Musturappa
  • , S. Prasannakumar
  • , K. M. Mahadevan
  • , B. S. Sherigara

    Research output: Contribution to journalArticlepeer-review

    14 Scopus citations

    Abstract

    Free radical copolymerization of N-vinyl-2-pyrrolidone with 2-ethoxyethyl methacrylates was carried out with 2,2'-azobisisobutyronotrile as an initiator in 1,4-dioxane. The resulting copolymer was characterized by FTIR, H1-NMR and C13-NMR spectroscopic techniques thermal properties of copolymer were determined by DSC and TGA. The reactivity ratios of the monomers were computed by the Fineman-Rose (F-R), Kelen-Tudos (K-T) and extended Kelen-Tudos (EK-T) method at lower conversion, using the data obtained from both FTIR and elemental analysis studies; the results are in good agreement with each other. The average reactivity ratio, Alfrey-Price Q and e values were found to be r1=0.769, r2=0.266 and Q1=0.0859, e1=0.4508, respectively for NVP/EOEMA copolymer. The distribution of monomer sequence along the copolymer chain was calculated using a statistical method based on obtained reactivity ratio. The number average molecular weight and polydispersity were determined by GPC.

    Original languageBritish English
    Pages (from-to)1161-1169
    Number of pages9
    JournalJournal of Macromolecular Science, Part A: Pure and Applied Chemistry
    Volume44
    Issue number11
    DOIs
    StatePublished - Nov 2007

    Keywords

    • Comonomer sequence and distribution
    • Ethoxyethyl methacrylate
    • N-vinylpyrrolidone
    • Reactivity ratio

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