Berlin 2024 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 63: Poster DS (joint session DS/MM/O)
O 63.30: Poster
Mittwoch, 20. März 2024, 17:00–19:00, Poster B
Influence of processing atmospheres on curing and bonding of cyanoacrylate adhesives — •Philipp Moritz, Oliver Höfft, Lienhard Wegewitz, and Wolfgang Maus-Friedrichs — Technical University Clausthal, Clausthal-Zellerfeld, Germany
Cyanoacrylates are fast-curing adhesives that are often used in joining technology to bond components together quickly. The curing and strength of the bond are often improved with numerous additives and surface pre-treatments. However, the surrounding process atmosphere is an aspect that has hardly been used to control curing and adhesive interactions.
To investigate the interactions and curing, thin films of cyanoacrylate are deposited on natively oxidized copper substrates. The surrounding atmosphere is varied between (i) air atmosphere, (ii) argon and (iii) an oxygen-free environment (O2 partial pressure < 10−20 mbar).
The curing and underlying molecular interactions at the interface between cyanoacrylate and oxidized copper are investigated using spectroscopic and microscopic methods.
Curing in argon and the O2-free atmosphere is significantly slower than in air. Nevertheless, strong interactions occur in an oxygen-free atmosphere and air, e.g. hydrogen bonds and ionic interactions. In argon, on the other hand, no molecular interactions are observed.
Funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) – Project-ID 394563137 – SFB 1368.