Skarlupka, R Seo, Y Yu, HU 2024-01-21T17:41:01Z 2024-01-21T17:41:01Z 2021-09-05 1998-01 0032-3861 https://pubs.kist.re.kr/handle/201004/143420 The surface viscoelastic properties of poly(vinyl acetate) (PVAc), spread as a monolayer at the air-water interface, were determined using the electrocapillary wave diffraction (ECWD) technique with the Wilhelmy plate method for static surface tension measurements. Surface longitudinal viscosity, kappa, and elasticity, epsilon, were calculated from the dispersion equation for surface waves over a range of surface concentrations. The static and dynamic elasticities were in agreement at the low surface concentrations but showed some differences at higher concentrations. The difference in surface viscoelastic properties measured by ECWD and by surface quasi-elastic light scattering (SLS) was ascribed to the difference in monolayer response to waves of different wavelengths. Because of the relatively long wavelengths of ECWD capillary waves, the monolayer surface elasticities measured by ECWD were smaller than the static elasticities in the concentration range where maximum damping due to the resonance between the longitudinal wave and the transverse capillary wave occurs. (C) 1997 Elsevier Science Ltd. English ELSEVIER SCI LTD LIGHT-SCATTERING POLYVINYL ACETATE) POLY(ETHYLENE OXIDE) CAPILLARY WAVES MONOLAYERS FILMS POLY(DIMETHYLSILOXANE) PROPAGATION DEPENDENCE LAYERS A study of the surface viscoelasticity of poly(vinyl acetate) at the air-water interface using the electrocapillary wave diffraction technique Article 10.1016/S0032-3861(97)00275-9 1 POLYMER, v.39, no.2, pp.387 - 392 POLYMER 39 2 387 392 scie scopus A1998YJ31700017 2-s2.0-0031673704 Polymer Science Polymer Science Article LIGHT-SCATTERING POLYVINYL ACETATE) POLY(ETHYLENE OXIDE) CAPILLARY WAVES MONOLAYERS FILMS POLY(DIMETHYLSILOXANE) PROPAGATION DEPENDENCE LAYERS poly(vinyl acetate) surface viscoelasticity electrocapillary wave diffraction