Polymer networks containing consist of long polymer linked together using crosslinking points, making them strong and tough materials, but often at the expense of recyclability or adaptability. Introduction of dynamic linkers, such as non-covalent or dynamic covalent linkers into a polymer material can give materials with properties such as self-healing, increased toughness and shape memory characteristics. This enables dynamic materials be reused, remolded and reprocessed. However, there is a delicate tradeoff between desirable dynamic characteristics and also undesirable mechanical instability under load or susceptibility to creep. Therefore, designing dynamic linkers with optimized for dynamic character and performance under ambient conditions is critical to applications of these materials. This talk will focus on polymer materials that contain both dynamic covalent and dynamic non-covalent bonds in a single material. Distinct dynamic covalent chemistries will be explored, leading to a synergy of dynamic character from the fast exchanging bond and stability from the tunable slow exchanging bond. Polymer architecture is a further tool that can be used to enhance and tune material properties, with both macromolecular and network architecture explored. This presentation will focus primarily on how network architecutre can be used to tune material and composite materials in a general manner.

Responsive materials tailored by dynamic chemistry and network architecture

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ACS Spring 2023

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