Abstract
The effect of some following factors on viscosity of pectin solution were determined by the coaxial type rotational viscometer: pH, storage temperature, storage period, velocity gradient, concentration and temperature.
The reduced viscosity showed the minimum value at the 0.2-0.4% pectin concentration, and increased according to the decrease of the concentration. When sodium chroride was added in different quantities viscosity behavior of pectin gel showed typical curves for polyelectrolytes.
Apparent activation energy was depend to the temperature and calculated using the Andrade's equation in the range of 10-90°C as follows: 2.8-5.4 kcal/mol at the lower temperature, 1.7-4.3 kcal/mol at the higher temperature.
