Mechanical and Rheological Moduli of Interpolymer Complex Solutions: Experimental and Theoretical Analysis
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In this study, the rheological and mechanical properties of aqueous polymer solutions and interpolymer complexes (IPCs) composed of sodium carboxymethylcellulose (Na-CMC) and polyacrylamide (PAA) were investigated using the Anton Paar MCR 92 rotational rheometer. The experiments included measurements of torque, shear stress, and calculations of the elastic modulus ( G ) across a wide angular frequency range (0.314–628 rad/s). The results demonstrated that IPCs, particularly the Na-CMC:PAA composition at an 80:20 ratio, showed substantially higher torque values (up to 56.287 mN·m) and G modulus (up to 13,796 Pa) compared to individual Na-CMC or PAA solutions. This increase is attributed to enhanced intermolecular interactions, including hydrogen bonding and electrostatic forces, forming a more cohesive and elastic polymer network. These findings suggest the high potential of such IPCs in advanced materials requiring superior viscoelastic performance. PACS: 62.20.de
