Free radical graft copolymerization of methacrylamide onto agar

Graft copolymerization of methacrylamide (MAM) onto agar was studied in an aqueous solution using ceric ammonium nitrate, as an initiator. The grafting reaction was influenced by the reaction time, concentrations of monomer and initiator and material-to-liquor ratio. The grafting reaction has also b...

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Bibliographic Details
Published in:European polymer journal 1999-07, Vol.35 (7), p.1237-1243
Main Authors: Athawale, V.D., Padwaldesai, M.P.
Format: Article
Language:English
Subjects:
Agar
Applied sciences
Ceric ammonium nitrate
Exact sciences and technology
Graft copolymerization
Methacrylamide
Natural polymers
Physicochemistry of polymers
Starch and polysaccharides
TGA
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Summary:Graft copolymerization of methacrylamide (MAM) onto agar was studied in an aqueous solution using ceric ammonium nitrate, as an initiator. The grafting reaction was influenced by the reaction time, concentrations of monomer and initiator and material-to-liquor ratio. The grafting reaction has also been studied in the presence of solvents. The maximum percentage add-on (17.28) has been observed at 30°C for the concentration of monomer (0.69 mol/L), initiator (20 mmol/L), for the reaction time of 3 h. Acid hydrolysis and infrared (IR) spectroscopy were used for confirmation of the graft copolymer formation. Further, thermogravimetric analyses (TGA) of agar and a typical graft copolymer were studied. The solubility/swellability and the gelatinization characteristics are reported.
ISSN:0014-3057
1873-1945
DOI:10.1016/S0014-3057(98)00200-6