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Determination of copolymerization parameters of methyl methacrylate with dodecyl methacrylate by means of FTIR spectroscopy
Author(s) -
Kleinová Angela,
Borsig Eberhard,
Schulze Ulrich,
Pionteck Jürgen
Publication year - 1996
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.1996.021970719
Subject(s) - copolymer , methacrylate , polymer chemistry , fourier transform infrared spectroscopy , methyl methacrylate , spectroscopy , chemistry , materials science , polymer , chemical engineering , organic chemistry , physics , engineering , quantum mechanics
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 /CO 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 CO maximum observed for the copolymer in CDCI 3 solution, compared to the corresponding homopolymer solutions, could also be used for determining copolymer composition.