Polymers in strong magnetic fields
Triggering chemical reactions across polymer-polymer interfaces
Polymer composites are of great importance in the development of new synthetic materials. Important is the knowledge about molecular processes and interactions between different polymers in order to obtain materials with tailored and outstanding properties. In terms of long term stability and high mechanical stability the formation of covalent bonds between different polymers are of high impact. However, there are a number of restrictions for the formation of such bonds between polymers. Reactive additives or special interface layers have to be introduced for bonding polymers. However these additives may lead either to unwanted properties of the material.
The aim of project is focused on the triggering of chemical reactions between poly-mers. When small metal particles, embedded in the polymer-polymer interface, ex-posed to high magnetic field pulses an Eddy current heating occurs. The local ele-vated temperature triggers chemical reactions between functional groups of two dif-ferent polymers. The major advantage is that the increased temperature is limited to the polymer-polymer interface.
Fig. Scheme of magnetic pulse triggered chemical reaction inbetween Polycarbon-ate and Poly(vinyl amine)
Reactive Welding of polymers - new materials
The welding process between two or more different polymers is initiated by local heating of metal particles due to Eddy current caused by very short but strong mag-netic pulses. Since the metal particles are placed in the polymer-polymer interface bulk material will be not heated. The magnetic pulse welding initiated also the for-mation of covalent bonds so that new types of materials with high performance fea-tures can be produced.
- Helmholtz-Zentrum DresdenRossendorf, Hochfeld Magnet-Labor
- Technische Universität Dresden, Medizinische Fakultät Carl Gustav Carus, Klinisches Sensoring und Monitoring
- Vilnius University, Lithuania, Department of General Physics and Spectroscopy