[The studies on YCl3/PEU system by rheology analysis and FTIR].

FTIR spectroscopy and rheology analysis were applied to study the YCl3/PEU system. It is apparent that modification with lanthanide complexes such as yttrium leads to a slight increase in viscosity of the polyether urethane solution. The authors conclude that this may be due to the interaction between the lanthanide ions and the polar group in urethane.A new band appears at 1650 cm(-1) in the infrared spectra of the YCl3/PEU system, which corresponds to the new carbonyl structure formed through the coordination with yttrium cations. The dynamic rheological behaviors of the solutions demonstrate the interaction furthermore. A higher molecular weight formed with the higher concentration of the lanthanide ions in this DMF solution. And this could be an effective method to characterize the structure of the polymer solutions.