Novel materials that can reversibly adapt to their environment are important as functional materials. In polymer networks, dynamic bonding of the crosslinks, which can break and reform under an external stimuli (e.g. heat or mechanical stress) are of interest for functional material properties, (e.g. self-healing or shape memory). One general route to introduce dynamic bonds is through non-covalent interactions. Ion-pairing, is another potential non-covalent dynamic bond that has not been fully investigated especially when compared to other interactions like hydrogen bonding and metal-ligand interactions. In this work, ionically crosslinked networks of a poly(butyl acrylate) elastomer by vinyl benzyl tri-n-octyl ammonium/phosphonium styrene sulfonate ion pairs were prepared as model system to study the thermo-mechanical properties as a function of the network parameters, including ion-pair chemistry and crosslink density. Results of rheological behavior, mechanical and thermal properties of these materials will be comprehensively studied compared to other ionic systems, such as ionomers with pendant counter ions.

Synthesis and characterization of organic ion-pairs as dynamic bonds for stimuli-responsive polymers

253rd National Meeting (2017)

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