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Dynamic dissolution of persimmon leaves in DMSO and DMAc and the influence of acid-base interactions
1Department of Polymer Material and Engineering, Donghua University, 1882 W. Yan An Road, 200051 Shanghai, China.
Abstract:
Applying conductivity as a measure, dynamic behavior for dissolution of persimmon leaves in two organic solvents, e.g. DMSO and DMAc, respectively, were recorded and a mathematical model described as: dC/dt = k0 + k1C + k2C2 was deduced (of which, C is the concentration dissolved, k0, k1 and k2 are the different dissolution rate constants corresponding different dissolution stages and t is the time). Results showed that the DMAc seems to be better than that of DMSO due probably to the former having a higher activation energy and smaller acid/base ratio and polarity comparing to the latter. However, for a lower temperature, it seems to be contrary due to DMSO presented greater dissolution rate constant than that of DMAc.
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