Abstract
Abstractκ‐Carrageenan‐g‐PMMA copolymer has been synthesized by copolymerizing κ‐carrageenan with methyl methacrylate (MMA) in aqueous medium at about pH 7. The copolymerization was carried out under microwave irradiation in the presence of a water‐soluble initiator potassium persulphate. Optimum microwave irradiation conditions for obtaining maximum yields are described. The structural characteristics and thermal stability of κ‐carrageenan‐g‐PMMA was studied by FTIR, NMR, and thermo gravimetric (TGA) measurements. Crystallinity of the copolymer was studied by powder X‐ray diffraction. TGA, IR, and XRD data indicated that the κ‐carrageenan was considerably modified. Optical micrograph of the copolymer was also studied. A probable mechanism of formation of the copolymer is proposed. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 101: 161–166, 2006
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