Reference : Functional nano fillers in epoxy-dicyandiamide adhesives for prolonged shelf life and...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
Engineering, computing & technology : Materials science & engineering
http://hdl.handle.net/10993/13858
Functional nano fillers in epoxy-dicyandiamide adhesives for prolonged shelf life and efficient cure
English
Gaukler, J. Ch [Saarland University > Chair of Adhesion & Interphases in Polymers]
Müller, Ulrich mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit >]
Krüger, Jan-Kristian mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit >]
Possart, W. [Saarland University > Chair of Adhesion & Interphases in Polymers]
2011
e-Polymers
European Polymer Federation
10
1-15
Yes (verified by ORBilu)
International
1618-7229
Eindhoven
Netherlands
[en] Shelf life at room temperature and curing behaviour at elevated temperature are studied for hot-curing accelerated epoxies (EP, diglycidylether of bisphenol A plus dicyandiamide (Dicy)) by FTIR-spectroscopy and modulated DSC. The accelerator is added either directly or with nano-zeolite filler to the EP. Due to the immobilization of the accelerator in the pores of the nano-zeolite, the shelf life of this EP is 5 times longer than for the EP containing free accelerator. While the free accelerator acts during the whole heating step to curing temperature, the nano-zeolite does not release the accelerator before ca. 100 °C. As monitored by light microscopy, the released accelerator not only supports the curing but also stimulates the dissolution of the solid Dicy. As the result, network formation at 170 °C finishes within less than 25 minutes for the nano-filled EP.
http://hdl.handle.net/10993/13858
http://www.e-polymers.org/journal/download.cfm?abstract_Id=4302&pdf_name=wpossart_010311.pdf

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