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Configuration of Amylose Acetate in Dilute Solution by Patel, R. S. ;Patel, R. D. is a Chemistry article available to read on EtoBox.

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Intrinsic viscosities of potato amylose acetate fractions ha>e been h e s t i g a t e d as function of temperature, solvent, and molecular weight. Relationship of viscosity with molecular weight has been established and the exponenhas been = KMv has been discussed in the light of heterogeneity of the fractions. From the study of flexibility of the amylose acetate molecule in CH,NO, as calculated from the effective bond length the KUHN-KUHN equivalent chain segment length, and the ratio of the unperturbed dimension to the dimension assuming free rotation of chain units, it has been observed that-amylose acetate is not as stiff as cellulose but stiffer than polystyrene. However, the values of GG @ indicates that the steric hindrance in the amylose chain is equal t o that in the cellulose chain which is much higher than a flexible polymer chain. ## ZU SAMMENFASSUNG: Die Viskositatszahl von Kartoffe!arnyloseacetat-Fraktioncn wurde als Funktion von Temperatur, Losungsmittel und vom Molekulargewicht untersucht. Die Beziehung zwischenviskositat und Molekulargewicht wurde aufgestellt,und der Exponent v der Gleichung [q] = K M v wurde im Lichte der Heterogenitat der Fraktionen diskuticrt. A

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Author
Patel, R. S. ;Patel, R. D.
Publisher
Wiley (John Wiley & Sons); Wiley (ISSN 0025-116X)
Published
1966
Language
EN
Field
Chemistry (Physical Sciences)

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