Synthesis and characterization of Sodium salt of partially carboxymethylated starch

Sodium salt of partially carboxymethylated starch (Na-PCMS) was prepared in a completely heterogeneous process in an isopropyl water slurry and the influence of the reaction conditions on the degree of substitution (DS) was checked. The concentration of aqueous sodium hydroxide solution, which was u...

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Bibliographic Details
Published in:International journal of polymeric materials 2002-01, Vol.51 (12), p.1081-1085
Main Authors: Pandya, Prashant D., Patel, Nirmal K., Sinha, Vijay K.
Format: Article
Language:English
Subjects:
Applied sciences
Carboxymethylated Starch
Exact sciences and technology
Ir Spectrum Synthetic Conditions
Natural polymers
Physicochemistry of polymers
Starch and polysaccharides
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Summary:Sodium salt of partially carboxymethylated starch (Na-PCMS) was prepared in a completely heterogeneous process in an isopropyl water slurry and the influence of the reaction conditions on the degree of substitution (DS) was checked. The concentration of aqueous sodium hydroxide solution, which was used to activate the starch, was varied in the range from 8 to 30% Wt, reaction time from 2 to 6 hr at 55°C. The reaction with sodium monochloroacetate leads to the highest degree of substitution of 1.24 at a NaOH concentration of 15% and 5 hr reaction time. Using a lye concentration of 30% no influence of the reaction time between 2 hr and 6 hr was found. From FTIR spectroscopical studies it was concluded that all the samples were Na-PCMS.
ISSN:0091-4037
1563-535X
DOI:10.1080/714975698