Modeling Of UV Oligomers and Monomers Properties : Viscosity and Shrinkage

摘要

Possibilities and limitations of molecular modeling as applied to understand, predict and calculate UV oligomers and monomers propertiesare discussed, on the basis of several case studies. A model has been developped to predict viscosities of oligomers and oligomer/monomer blemds. The model based on a classical scaling law for the molecular weight dependence and on the Williams-Landel-Ferry (WLF) equation for the temperature dependence leads to remarkable results. The model takes into account the monomeric composition, physical properties of oligomers such as glass transition and critical molecular weight and the intrinsic glass transition of monomers. Calculation of shrinkage of UV monomers can be performed through group contribution techniques. Agreement between calculated and experimental values is good. Importance of vitrification is stressed.