Read e-book online Starch derivatization: fascinating and unique industrial PDF

By K. F. Gotlieb

ISBN-10: 1578083893

ISBN-13: 9781578083893

ISBN-10: 9076998604

ISBN-13: 9789076998602

"The ebook is meant for the (industrial) starch researcher in addition to for everybody else attracted to the derivatization and alertness of polysaccharides and traditional polymers."--BOOK JACKET.

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Extra info for Starch derivatization: fascinating and unique industrial opportunities

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With NaOH as well as with Ca(OH)2 as catalyst the formation of oxyperoxides is assumed. Gluconic acid is converted faster than sorbitol into low molecular products. Carbohydrates with a cyclic structure (saccharose, methylglucoside) are only degraded at higher temperatures. O ] is possibly suited for the degradation of polysaccharides. The kinetics of the starch oxidation are similar to those of the sucrose oxidation. Especially from the patent literature it is known that Ca(OH)2 can be used instead of NaOH in various alkali catalyzed etherifications of starch.

This is probably explained by the complexing of the 2-nitropropylacetate by the amylose after which the C-OH groups reacts. References 1. J. Schoch, Cereal Chem. 1941; 18: 121. 2. J. Schoch, J. Amer. Chem. Soc. 1942; 64: 2957. 3. , Tetrahedron Letters. 1983; 24(33): 3501-3504. 4. W. Kubick, Starch /Stärke. 1993; 45: 220. 5. A. , Nature. 1992; 356: 325. 6. A. , Macromol. Rep. 1995; A32(supl5,6): 813-819. 7. , Chem. Commun. 2001; 449-450. 8. V. , Macromolecules. 1997; 30: 5361-5366. 9. , J. Appl.

So far this question - not an easy one as all products to be investigated have to be made from the same raw materials and the same chemicals under identical conditions - has not been studied. Another issue - for those cases where viscosity is not predominant - is the use of carboxymethyl/hydroxyethyl ethers of starch, cellulose etc. In the preparation of super absorbents (4, 5) based on CMC and HEC in one case mixtures of CMC and HEC are cross-linked with divinylsulfon while in the other case mixtures of CMC and HEC are used.

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Starch derivatization: fascinating and unique industrial opportunities by K. F. Gotlieb

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