Viscosity behavior of hydroxylated and acetoacetylated polyesters

Abstract

AbstractViscosity studies on polyester polymers are important for governing their processing characteristics before their industrial application. In this study, the viscosity properties of hydroxylated polyesters with different diols and partially acetoacetylated polyesters with different amounts of ethyl acetoacetate were examined. The melt viscosities of these polymers were measured with different shear rates and at varying temperatures. The results were analyzed with the Williams–Landel–Ferry equation. In high‐solid‐coatings applications, an understanding about the surface properties and thermodynamic quantities, such as cohesive energy density, the solubility parameter, and the Flory–Huggins interaction parameter, are important. To evaluate these quantities, an atomistic simulation methodology based on Accelrys software was used, which provided insights into the structures of these compounds for further applications. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 100: 2422–2435, 2006