Essay Examples on Viscosity

The solution of methylcellulose is having a special gelation phenomenon

The solution of methylcellulose is having a special gelation phenomenon that commonly occurs by heating it so that it can change to gel and by cooking in order to form a clear solution Hirrien et al 1996. An increase in the viscosity of solution the gelation temperature of a given degree of substitution gets decreases with the addition of electrolytes lowers the gelation temperature Brandt 1986. The quantities of salts added also affected it. A few of these salts played a lead role in the prevention of dissolution of methylcellulose at ambient temperature Levy and Schwarz 1958. The addition of electrolytes and the procedure of heating destroy the hydrated structure. During this hydrogen bond between water and the polymer gets broken. When polar water mixed with organic solvents for instance alcohol or glycols are added then the solution of Methylcellulose gets stabilized Kundu et al 2003. Methylcellulose and the polar additives form strong hydrogen bonds which increase gelation temperatures and able to create more stable soluble complexes in the solution Brandt 1986 Kundu et al 2003.

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