Rheo-Raman: Chemo-mechanical monitoring of the cross-linking process in epoxy resins
Sprache des Vortragstitels:
Sprache des Tagungstitel:
Mechanical properties of pure epoxy resins depend on the cross-linking density. Additives are used to tailor the properties of resins. To investigate their influence, two methods are used: A) Mechanical: Rheological data give information regarding the storage and loss modulus, viscosity, gel point etc. B) Chemical: Raman-microscopy is an excellent tool for the observation of cross-linking of epoxy resins, as it displays the splitting of the epoxy bonds at 1257 cm-1. The combination of both methods provides extensive insight in the curing process of different resin systems. By the in situ measurements of Raman and rheological data one can investigate the influence of the degree of cross-linking on the viscosity, storage and loss modulus. The simultaneous investigation of rheological and spectroscopic data enables a closer look at the processes and the responses of the system during the curing of resins. The Rheo-Raman-System consists of a Thermo Fischer DXR Raman Microscope and an Anton Paar MCR 502 Rheometer, linked by an optical adapter. The aim of the project is to investigate the cross-linking of epoxy resins with different additives like accelerators, flexibilizers or diluents, at different curing temperatures by in situ Rheo-Raman-measurements.