Basically, different curing reactions can be found in industrial applications for polyurethane adhesives: In addition to the moisture-curing one-component systems, two-component polyurethanes are also used. Both variants can have comparable final properties. The curing reaction of an adhesive system is more or less strongly dependent on the temperature. For this reason, curing times in the application process can be controlled via temperature control. However, it should be noted that not every adhesive and especially not every polyurethane system is suitable for curing at elevated temperatures. The project focuses especially on a temperature increase with a fast heating rate, e.g. by inductive heating.
The aim of the project is to understand and describe the thermo-hygric processes occurring during accelerated curing in the adhesive. For this purpose, analytical investigations of the dependence of the mechanical properties of the adhesive on the temperature control during the curing process are performed. A thermomechanical-chemical coupled material model will be developed by the project partner and implemented in a finite element program. At the end of the project the developed material model will be validated and parameter studies will be performed to optimize the curing process.
