Influence of self-complementary hydrogen bonding on solution properties of cellulose acetate phthalate in solvent/non-solvent mixtures

The transition from the unentangled regime to the entangled one at higher concentration and the existence of hydrogen bonding were analyzed by dynamic viscosity. In addition, morphological properties of cellulose acetate phthalate (CAP) in solvent/non-solvent mixtures of 2-methoxyethanol/water were studied. The increase of water content contributed significantly to hydrogen bonding with cellulose acetate phthalate, generating the entanglement process, along with other types of interactions. Our research demonstrated that CAP easily dissociate in a relatively low polar solvent, such as 2-methoxyethanol, leading to strong intermolecular interaction with the addition of water, ascertaining the influence of hydrogen bonding on the thermodynamic properties. This study is significant for using cellulose acetate phthalate in different domains.