Multifunctional Polymer Networks Based on a Hydrogen Bonding and Dynamic Covalent Thiourea Motif for Emerging Applications
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Significant progress has recently been made in developing dynamic covalent polymer networks (DCPNs) for advanced emerging applications. However, creating simplified yet highly effective network architectures with multifunctional capabilities using DCPNs still remains a challenge. Here, we present the utilization of thiourea linkage as a hydrogen bonding and dynamic covalent dual-functional motif, enhancing the mechanical versatility of DCPNs. Incorporating thiourea bond chemistry, along with oligoether spacers, empowers DCPNs with diverse mechanical characteristics, including stiffness, strength, toughness, resilience, and adaptability. This approach also introduces functionalities like malleability and reprocessability. By carefully tailoring the molecular structure of these networks, we demonstrate their versatility in various applications, including multifunctional electrode binders, reprocessable ion-conducting elastomers, and recyclable artificial muscles.