Microrheological properties of poly2-hydroxyethyl methacrylate

This paper takes poly2-hydroxyethyl methacrylate (PHEMA) as an example, the effects of linear and branched structures on the microrheological properties of polymers are studied to further supplement and further understand the importance of microrheological properties for optimising material properties and expanding the scope of application. The experimental results show that the higher the molecular weight of linear PHEMA, the higher the storage modulus and the higher the complex viscosity; the higher the degree of branching of branched PHEMA, the lower the storage modulus and the lower the complex viscosity. The mean square displacement of tracer particles in isopropanol solutions of linear and branched PHEMA has a good linear relationship with the lag time, and the slope of the curve of linear PHEMA(0.74 ~ 0.86) is smaller than that of branched PHEMA(0.91 ~ 0.95). The loss factor of linear PHEMA is lower than that of branched PHEMA.