Title: CHARACTERIZATION AND MODELLING OF THE REACTION PROGRESS OF A FAST-CURING POLYURETHANE SYSTEM
Authors: Philipp Surray, Dominik Foerges, Kai Fischer, Christian Hopmann
Abstract: For the development and simulation of production processes of composite or plastic components using reactive resins, such as polyurethane or epoxy, the availability of cure data is decisive. A broad variety of methods is used for the characterization of the curing process, of which differential scanning calorimetry is one of the most discussed methods in literature. The characterization of fast-curing resins, which cure without inhibition time, below ambient temperatures and in less than two minutes often results in incomplete data. To overcome these drawbacks the authors have developed a differential scanning calorimetry with a direct injection mechanism allowing the start of the measurement less than 10 seconds after mixing the resins. Using this measuring cell, the complete characterization of the reaction progress for a fast-curing polyurethane system with a gel time of 8 s to 10 s at 80 °C is possible for non-isothermal as well as isothermal conditions. Cure models calibrated with the gathered data show good prediction quality. The results close a gap in current measurement systems for cure analysis and are the basis for improving simulation and analysis of short-cycle manufacturing processes.
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Conference: SAMPE 2023
Publication Date: 2023/04/17
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