Copolymerization of N-Vinyl pyrrolidone with methyl methacrylate by Ti(III)-DMG redox initiator

Authors : Ajithkumar Manayan PARAMBIL, Yashoda Malagar PUTTAIAHGOWDA

Pages : 397-409

Doi:10.3906/tar-1203-75

View : 14 | Download : 6

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :Redox copolymerization of N-vinyl-2-pyrrolidone insert ignore into journalissuearticles values(NVP); with methyl methacrylate insert ignore into journalissuearticles values(MMA); was carried out using titaniuminsert ignore into journalissuearticles values(III);-- dimethylglyoxime [Tiinsert ignore into journalissuearticles values(III);-DMG] redox initiator in aqueous sulfuric acid-alcohol media. The resulting copolymer was characterized by FTIR, 1H-NMR, and 13C-NMR spectroscopic methods and elemental analysis. Thermal properties of the copolymer were determined by differential scanning calorimetric technique and thermogravimetric analysis. The reactivity ratios of the monomers were computed by Fineman-Ross, Kelen-Tudos, and extended Kelen-Tudos methods at lower conversion. The reactivity ratios obtained r1 insert ignore into journalissuearticles values(MMA); 1.69 and r2 insert ignore into journalissuearticles values(NVP); 0.03 showed richer content of MMA than NVP in the copolymer having extreme ideal behavior. The distribution of monomer sequence along the copolymer chain was calculated using a statistical method based on reactivity ratios. Tiinsert ignore into journalissuearticles values(III);-DMG redox initiator showed increased addition of NVP to MMA during copolymerization.
Keywords : Redox initiator, copolymerization, reactivity ratios