A Metal Salt Dependent Self-Healing Response in Supramolecular Block Copolymers

作者：Enke Marcel; Bose Ranjita K; Bode Stefan; Vitz Juergen; Schacher Felix H; Garcia Santiago J; van der Zwaag Sybrand; Hager Martin D^*; Schubert Ulrich S^*

来源：Macromolecules, 2016, 49(22): 8418-8429.

DOI：10.1021/acs.macromol.6b02108

Different block copolymers containing terpyridine were synthesized applying the reversible addition-fragmentation chain transfer (RAFT) polymerization. The block copolymers contain polystyrene as hard block, and the soft block consists of n-butyl acrylate (BA) as well as terpyridine units as ligand. These block copolymers were further cross-linked with several metal salts in order to tune the self-healing behavior. Metallopolymers cross-linked with manganese(II) chloride featured the best self-healing behavior. Furthermore, a two-step mechanism behind the self-healing process of these metallopolymers could be attributed to each block of the copolymer and was studied extensively. In addition, rheological parameters were determined and correlated with the other results.

• 出版日期2016-11-22