ISSN:
1436-2449
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Summary In order to characterize heavyweight carboxymethylcellulose (C.M.C) by 13C NMR it is necessary to hydrolysis them. This paper proposes and compares three different ways of degradation: acidic hydrolysis, sonication and enzymatic degradation. Acidic hydrolysis leads to poor results due to a strong alteration of the sample. Sonication gives quite good results but the enzymatic degradation is the most efficient method for degrading C.M.C under good conditions. After hydrolysis, the sample was analysed by 13C NMR and HPLC to obtain structural information such as substitution degree, preferential substitution sites and regularity of the substitution along the polymeric chain.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00302615
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