Synthesis, characterization and applications of graft copolymer (Chitosan-g- N, N-dimethylacrylamide)
An unreported graft copolymer of N, N-dimethylacrylamide (DMA) with chitosan has been synthesized under nitrogen atmosphere using peroxymonosulphate/mandelic acid redox pair. The effect of reaction conditions on grafting parameters i.e. grafting ratio, efficiency, conversion, add on and homopolymer...
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Published in | Carbohydrate polymers Vol. 79; no. 1; pp. 40 - 46 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier Ltd
05.01.2010
|
Subjects | |
Online Access | Get full text |
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Summary: | An unreported graft copolymer of
N,
N-dimethylacrylamide (DMA) with chitosan has been synthesized under nitrogen atmosphere using peroxymonosulphate/mandelic acid redox pair. The effect of reaction conditions on grafting parameters i.e. grafting ratio, efficiency, conversion, add on and homopolymer has been studied. Experimental results show that maximum grafting has been obtained at 1.0
g
dm
−3 concentration of chitosan, 30
×
10
−2
mol
dm
−3 concentration of
N,
N-dimethylacrylamide and 7.0
×
10
−3
mol
dm
−3 concentration of hydrogen ion. It has also been observed that grafting ratio, add on, conversion and efficiency increase upto 3.2
×
10
−3
mol
dm
−3 of mandelic acid, 12.0
×
10
−3
mol
dm
−3 of potassium peroxymonosulphate, 150
min of time and 40
°C of temperature. Grafted polymer has been characterized by FTIR spectroscopy and thermogravimetric analysis. Water swelling capacity of chitosan-g-
N,
N-dimethylacrylamide has been determined. It has been observed that the graft copolymer is thermally more stable than parent backbone. |
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ISSN: | 0144-8617 1879-1344 |
DOI: | 10.1016/j.carbpol.2009.07.026 |