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The viscosity of a solution containing HEC is dependent on several factors, including the concentration of HEC, the molecular weight of the polymer chains, and the temperature of the solution. Higher concentrations of HEC and longer polymer chains typically result in a thicker solution

hydroxyethyl cellulose thickening mechanism. Additionally, HEC solutions are temperature-dependent, with higher temperatures leading to a decrease in viscosity due to the weakening of hydrogen bonds between the polymer chains.