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 language | British English |
|---|---|
| Pages (from-to) | 1161-1169 |
| Number of pages | 9 |
| Journal | Journal of Macromolecular Science, Part A: Pure and Applied Chemistry |
| Volume | 44 |
| Issue number | 11 |
| DOIs | |
| State | Published - Nov 2007 |
Keywords
- Comonomer sequence and distribution
- Ethoxyethyl methacrylate
- N-vinylpyrrolidone
- Reactivity ratio