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1. Hydrogen Bonding One of the key interactions in the thickening process of HEC is hydrogen bonding. The hydroxyethyl groups on the HEC chains can form hydrogen bonds with water molecules. This interaction not only contributes to the solubility of HEC but also helps in stabilizing the structure of the thickened solution. The extensive hydrogen bonding network formed in the solution increases resistance to flow, thereby enhancing viscosity.
hydroxyethyl cellulose thickening mechanism

Temperature is another vital factor that impacts solubility. As the temperature of the water increases, the solubility of HEC also tends to improve. This is primarily because elevated temperatures increase kinetic energy, allowing polymer chains to move more freely and interact more effectively with water molecules. However, it is important to note that while heat can facilitate solubility, excessive temperatures might also degrade the polymer, leading to a loss of desirable properties.
hydroxyethyl cellulose solubility in water
