Berlin 2018 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 32: Poster Session II

CPP 32.8: Poster

Dienstag, 13. März 2018, 14:00–16:00, Poster B

UV-Rheo-Raman: Chemo-mechanical monitoring of UV- cross-linking of polymers — •Moritz Strobel, Robert Gerstmayr, Milan Kracalik, and Sabine Hild — Johannes Kepler University, Institute for Polymer Science, Linz, Austria

Hydrogels are rising up to meet requirements of many different fields and are of increasing interest in various applications, such as soft contact lenses, wound dressing or stretchable electronics. Many studies have focused on the different areas of applications but fewer investigate the connection between mechanical and chemical properties of these polymers and the influence of different curing parameters on the obtained product. In our approach we investigate simultaneously the chemical and mechanical properties at the different stages of curing of the hydrogels. This allows us to recognize correlations between for example the reaction turnovers and the gel point. Aim of this study is to investigate the influence of the intensity and the exposure time of the UV-light initiating the curing process on the obtained hydrogel. Therefore, mechanical properties are obtained by shear rheology measurements analyzing the storage and the loss modulus. An installed UV-laser enables us to perform in-situ rheo-Raman-measurements while curing the hydrogel. Chemical information regarding the cross-linking of the polymers while initiating the curing with UV-light is obtained by adding Raman spectroscopy to this set-up.