In this paper, the chemical structure of pectin has been
modified by reacting of carboxyl group in pectin with tetrabutyl
ammonium hydroxide [TBA-OH], (acid-base) reaction, to change
hydrophilic properties by adding hydrophobic alkyl chains to the
polymer chain in pectin, Some physical properties of both: pectin
and tetrabutyl ammonium pectin; has been determined by
measuring the Kinematic viscosity, degree of turbidity and density
of their water solutions at different concentration.
In this paper, the chemical structure of chitosan has been
modified by trans esterification reaction with methyl esters both of
octanoic and dodecanoic acid, using potassium carbonate as a based
catalyst, the degree of substitution has been determ
inated to change
hydrophilic properties, Some physical properties of trans
esterification products has been determined by measuring the
Kinematic viscosity, degree of turbidity and density of their water
solutions.
