界面效应对高分子溶液粘度的影响

Using a viscometer with PTFE capillary, viscosity measurements, in the dilute concentration regime, of aqueous solution of neutral polymer polyethylene oxide(PEO) with molecular weight ranging from 100,000 to 1000,000 were carried out, the experimental results were compared with those from glass viscometer. Then viscosity parameters were obtained by fitting the obtained viscosity data and analyzed. The results indicate that the apparent viscosity phenomenon due to solute adsorption onto glass capillary inner surface in the course of viscosity measurement. According to the adsorption theory of neutral polymer solutions, a description of quantitative relationship of viscosity of neutral polymer solutions can be found.