Determination of copolymerization parameters of methyl methacrylate with dodecyl methacrylate by means of FTIR spectroscopy

✍ Scribed by Angela Kleinová; Eberhard Borsig; Ulrich Schulze; Jürgen Pionteck

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 402 KB
• Volume: 197
• Category: Article
• ISSN: 1022-1352
• DOI: 10.1002/macp.1996.021970719

✦ Synopsis

Abstract

The bulk copolymerization of methyl methacrylate (MMA) with dodecyl methacrylate (DMA) initiated by 2,2′‐azoisobutyronitrile (AIBN) at 60°C was used to prepare samples with different MMA/DMA ratios. The composition of the copolymers was determined by means of FTIR spectroscopy, using the absorption intensity ratio of CH~2~/CO for copolymers in CDCl~3~ solution and as KBr tablets. Reactivity ratios, determined by the Kelen‐Tüdős method, were found to be: r~MMA~ = 1.58 and r~DMA~ = 1.88 for copolymers analyzed in solution, and r~MMA~ = 1.67 and r~DMA~ = 1.95 for samples prepared as KBr tablets. Comparison of copolymer composition of some samples was made with elemental analysis data. It was found that the shift in the CO maximum observed for the copolymer in CDCI~3~ solution, compared to the corresponding homopolymer solutions, could also be used for determining copolymer composition.