The solution properties of various types of telechelic hydrophobically modified ethylene oxide urethane polymer (HEUR) in the presence of cyclodextrins were examined. Methylated (3 cyclodextrin (m-pCD) could effectively reduce the steady shear viscosity and the dynamic moduli of HEUR aqueous solutions. It was found that m- PCD interacts with HEUR in three progressive steps. At very low m-(3CD concentrations, m-pCD encapsulates the hydrophobes of looping HEUR chains, which destabilizes the transient network, while maintaining the number of mechanically active chains. However, the m-pCD/HEUR complex solutions become more sensitive to shear stress. At moderate m-pCD concentrations, m-pCD begins to deactivate the bridging chains resulting in a reduction in the number of mechanically active chains and this further weakens the transient network. Finally, when m-pCD is in excess, the network Methylated P-Cyclodextrin could effectively reduce the steady shear viscosity and dynamic moduli of HEUR aqueous solutions.

285 p.