A new class of supramolecular thermoplastic elastomers for self-healing coatings

A new class of supramolecular thermoplastic elastomers for self-healing coatings

Diaz, M.M.
Voorhaar, L.
Perkisas, T.
Abakumov, A.
Van Assche, G.
Van Mele, B.
Hoogenboom, R.

2013-06-16

A supramolecular material exhibiting self-healing properties was studied in this work. The material is based on the mixture of two ABA-type oligomeric triblock copolymers, the first consisting of positively charged end blocks and the second one of negatively charged ones. Each oligomeric triblock consists of a soft middle block and soft end blocks. When mixed together the resulting material phase-separates in an electrostatically assembled phase with a high glass transition temperature (Tg) and an uncharged phase with a low Tg. The mechanical and physical properties of the resulting thermoplastic elastomer can be tuned by varying the size of the charged blocks, using different polymer architectures and using different monomers. The building block oligomers are synthesized via reversible addition-fragmentation chain transfer (RAFT) polymerization using a bifunctional chain transfer agent and purified by precipitation. Characterization was done by Modulated Differential Scanning Calorimetry (MDSC), Dynamic Mechanical Thermal Analysis (DMTA) and Transmission Electron Microscopy (TEM). The self-healing behaviour of the coating was studied under optical microscope proving self-healing abilities after scratching.

supramolecular polymer
thermoplastic elastomer
coatings
phase separation

http://resolver.tudelft.nl/uuid:8b4d4641-91cb-4eec-ac2b-9848175c5157

Conference proceedings

conference paper

(c) 2013 Diaz, M.M.; Voorhaar, L.; Perkisas, T.; Abakumov, A.; Van Assche, G.; Van Mele, B.; Hoogenboom, R.