ADSORBED LAYERS OF TRITON X-100 ON A POLYETHYLENE SURFACE

Adsorption of Triton-100 from aqueous solutions on polyethylene (PE) w as studied using a piezoelectric microweighing method. This method was developed using a quartz microbalance and is based on the dependence of the vibration frequency of the quartz resonator (microbalance trans ducer) on the amount of the substance deposited on its surface. PE fil m was deposited on a resonator from an organic solvent. The advancing contact angles THETA(a) of water drops on the modified PE surface were measured on the same specimens. A comparison of GAMMA(c) and THETA(a) (C) isotherms showed that adsorbate was distributed nonuniformly over the PE surface; i.e., the adsorbed layer has an ''island'' structure.