Accurso, Adrian A. and Delaney, Mac and O'Brien, Jeff and Kim, Hyonny and Iovine, Peter M. and Diaz Diaz, David and Finn, M. G. (2014) Improved Metal-Adhesive Polymers from Copper(I)-Catalyzed Azide-Alkyne Cycloaddition. CHEMISTRY-A EUROPEAN JOURNAL, 20 (34). pp. 10710-10719. ISSN 0947-6539, 1521-3765
Full text not available from this repository. (Request a copy)Abstract
Electrically conductive adhesive polymers offer many potential advantages relative to Sn-Pb solders, including reduced toxicity, low cost, low processing temperatures, and the ability to make application-specific formulations. Polymers generated from the copper(I)-catalyzed cycloaddition (CuAAC) reaction between multivalent azides and alkynes have previously been identified as strong metal-binding adhesives. Herein we demonstrate that the performance of these materials can be remarkably improved by the incorporation of a flexibility-inducing difunctionalized component and a tertiary amine additive in optimized concentrations. The best formulations were identified by means of rapid adhesion testing of a library of potential candidates by using a custom-built instrument and validated in an American Society for Testing and Materials (ASTM)-standard lap-shear test. Characteristic phase transitions were identified by differential scanning calorimetry (DSC) for adhesives with and without the additives as a function of curing temperature. The incorporation of flexible components was found to more than double the strength of the adhesive. Moreover, the adhesive was made electrically conductive by the inclusion of 20 wt% silver-coated copper flakes and further improved in this regard by the incorporation of multiwalled carbon nanotubes in the formulation.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | CONJUGATED MOLECULAR WIRES; RUBBER-TOUGHENED EPOXY; CYANATE-ESTER POLYMERS; CLICK CHEMISTRY; CONDUCTIVE ADHESIVES; HETEROGENEOUS CATALYSIS; FRACTURE-BEHAVIOR; THIN-FILMS; POLYMERIZATION; POLYIMIDE; adhesives; click chemistry; conducting materials; polymers; silver |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Organische Chemie > Arbeitskreis Prof. Dr. David Díaz Díaz |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 30 Aug 2019 12:42 |
| Last Modified: | 30 Aug 2019 12:42 |
| URI: | https://pred.uni-regensburg.de/id/eprint/9738 |
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