Application of Redox-Switchable Polymerization for the Synthesis of Advanced Polymeric Materials

氧化还原切换聚合在先进高分子材料合成中的应用

• 批准号: 1955926
• 负责人: Dunwei Wang
• 金额: $ 40万
• 依托单位: Boston College
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-08-15 至 2024-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1955926&HistoricalAwards=false
• 关键词: Application; Redox; Switchable; Polymerization; Synthesis

With this award, the Chemical Catalysis Program of the NSF Division of Chemistry is supporting the research of Dr. Jeffery A. Byers of the Department of Chemistry at Boston College to develop new catalysts that can change what type of polymer is produced when exposed to external stimuli such as oxidants, reductants, or electrolysis. These switchable catalytic polymerization tools are being used to accelerate the development of sophisticated materials with tailored physical and mechanical properties, including degradable plastics. A diverse group of undergraduate and graduate students are being trained in catalyst development and polymer synthesis. A summer research program for local high school students called “Paper to Plastics” is being continued, evolved, and expanded to spark interest in STEM fields and to communicate the needs and challenges involved with the development of sustainable materials with useful properties.Redox-switchable polymerization catalysts are being developed to control block co-polymerization processes and polymer molecular weight distributions. An iron-catalyst system discovered by Dr. Byers and his research group undergoes a change in monomer selectivity when exposed to redox reagents and is being adapted to expand the types of monomers that can engage in redox-switchable polymerization reactions. Activation of this catalyst system with electrical current is being investigated to remove the need for chemical redox reagents and further broaden substrate scope to include reagents that need to be used under pressure. Electrolysis is also being studied to control molecular weight distributions through catalyst redox-switching, which provides additional opportunities to control polymer characteristics. The overarching goal of these activities is to enable the synthesis of sophisticated polymeric materials with desirable materials properties.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.

有了这个奖项，NSF化学部的化学催化计划支持波士顿学院化学系的Jeffery A. Byers博士的研究，以开发新的催化剂，这些催化剂可以改变当暴露于氧化剂，氧化剂，减少或电子分析等外部刺激（例如外部刺激）时产生的聚合物类型。这些可切换的催化聚合工具用于加速具有量身定制的物理和机械性能（包括可降解塑料）的复杂材料的开发。一组群组的本科生和研究生正在接受催化剂开发和聚合物合成的培训。一项针对当地高中生的夏季研究计划，称为“纸塑料”，正在继续，进化和扩展，以激发对STEM领域的兴趣，并传达具有有用特性的可持续性材料开发所涉及的需求和挑战。正在开发可转换的聚合催化剂，以控制控制块共聚合过程和聚合分子体重分布。 Byers博士及其研究小组发现的铁催化剂系统在暴露于氧化还原试剂时会改变单体选择性，并正在适应扩大可以从事可氧化氧化还原 - 可转换聚合反应的单体类型。正在研究使用电流的催化剂系统的激活，以消除对化学氧化还原试剂的需求，并进一步扩大底物范围，以包括需要在压力下使用的试剂。电解也正在研究通过催化剂氧化还原转换来控制分子量分布，这为控制聚合物特性提供了额外的机会。这些活动的总体目标是使具有理想材料特性的复杂聚合物材料合成。该奖项反映了NSF的法定任务，并通过使用基金会的知识分子优点和更广泛的影响审查标准来评估被认为是宝贵的支持。