Circularizing Squarate-Based Materials: Novel Dynamic Networks

圆形方形材料：新型动态网络

• 批准号: 2404144
• 负责人: Brent Sumerlin
• 金额: $ 66.46万
• 依托单位: University of Florida
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2024
• 资助国家: 美国
• 起止时间: 2024-06-01 至 2028-05-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2404144&HistoricalAwards=false
• 关键词: Circularizing; Squarate; Based; Materials; Novel

NON-TECHNICAL SUMMARYThis project seeks to develop the next wave of sustainable polymers, merging sustainability with material durability and practicality. A central objective is to overcome the current dichotomy within polymer science wherein recyclable and reprocessable materials often lack stability, while more robust ones lead to negative consequences because of their long-term environmental persistence. Through innovative design and precise molecular manipulation, this project aims to develop polymers that offer both long-term usability and innate reparability while maintaining their robust nature and resistance to solvents and high temperatures. The research will explore the critical molecular parameters of an underutilized chemical moiety that will govern polymer lifecycle—from synthesis to degradation—balancing processability with performance. The success of this project will lead to materials that require less frequent replacement, thereby reducing waste and promoting sustainability. Critical components of this project involve educational and outreach activities directed toward local students of all levels, as well as training and professional development of graduate and undergraduate students in emerging areas of chemistry and polymer science.TECHNICAL SUMMARYThe research focuses on four specific aims that collectively seek to expand the capabilities of covalent adaptable materials (CANs). Aim 1 investigates using pendent squarate esters as a novel dynamic exchange mechanism for CANs to improve the diversity of catalyst-free exchange chemistries for vitrimer materials. Aim 2 will explore the influence of pendent group squaramides on supramolecular polymer networks, aiming to understand how squaramides contribute to network properties and responsive behavior. The work in Aim 3 will combine squaramide and vinylogous urethane exchange to generate materials that are both dynamic-covalent and supramolecular, aiming to illustrate the enhanced properties that can be attained through straightforward methods. Aim 4 seeks to develop a new dynamic exchange approach through step-growth polycondensation, aiming to introduce unique exchange chemistry for CANs. The research employs a comprehensive set of molecular manipulations designed to elucidate fundamental structure-property relationships. The modularity of the approach provides a viable platform for understanding the roles of chain structure, topology, and functionality in the dynamic behavior of associatively crosslinked polymers. The scientific broader impacts of this research contribute to sustainability by designing polymers with longer life spans and recyclability. The work extends the benefits of dynamic networks to new exchange mechanisms, offering an alternative route to sustainable materials. The educational goals include this project serving as a training ground for the next generation of scientists. Students will acquire expertise in various synthetic and materials characterization methods, gaining a balanced understanding of both contemporary and foundational aspects of polymer science. A multi-pronged outreach program aims to foster excitement and broaden participation in science. The program includes research experiences with a focus on underrepresented minorities. By integrating scientific research with educational and outreach activities, the project aims to make a significant contribution to the field of polymer science while also addressing broader societal needs..This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

非技术总结项目旨在发展可持续的聚合物，而更强大的人会导致负面的环境持久性，旨在开发可提供长期可用性和可再生性的聚合物。对溶剂和高温的抗性将探索不足的化学物质的片段。对各个层面的当地学生，在化学和聚合物的新兴领域介绍了我们的特定目标，这些目标集体寻求扩大共价材料的能力（罐头）。玻璃体材料的化学材料。通过STRAITFORK WADION 4。共同的交联聚合物。在科学中，当代和基础方面的范围都包括在内的研究经验。还解决了更广泛的社会。这一点反映了NSF值得通过使用Toundation Acts审查标准进行评估的支持。