Two-State Living Coordinative Olefin Polymerization

有了这个奖项从化学催化计划，教授劳伦斯R。来自马里兰州大学帕克分校的Sita将致力于发现和开发新的范例、催化剂和聚合工艺，这些新的范例、催化剂和聚合工艺可用于显著扩大聚烯烃的范围及其最终用途应用，以支持新技术。 将追求的主要假设是，可以引入与链增长传播竞争的不同类别的快速和可逆的动态过程，以建立双态活性配位烯烃聚合，其中动态过程和传播的相对速率可以受到外部控制，以在由两个极端边界结构描绘的光谱上直接生产聚烯烃。几个新的范例将被构思和开发，以消除现有的限制，目前所施加的经典方法是基于一对一，催化剂结构和聚烯烃产品之间的一种关联。除了科学影响外，这项工作还将为美国在全球聚烯烃和化学工业中持续的科学和经济竞争地位提供支持，并支持未来的培训。为科学、技术、工程和数学（STEM）相关职业培养一代科学家和工程师。重要的是，发现和开发具有商业价值的新技术发明和创新将支持国民经济。

With this award from the Chemical Catalysis Program, Professor Lawrence R. Sita from University of Maryland at College Park will work on discovering and developing new paradigms, catalysts and polymerization processes that can be used to significantly expand the range of polyolefins and their end-use applications in support of new technologies. The primary hypothesis that will be pursued is that different categories of fast and reversible dynamic processes that are competitive with chain-growth propagation can be introduced to establish two-state living coordination olefin polymerization in which the relative rates of the dynamic process and propagation can be brought under external control to direct polyolefin production over a spectrum that is delineated by two extreme boundary structures. Several new paradigms will be conceived and developed in order to remove existing restrictions that are presently imposed by classical approaches that are based on a one-to-one correlation between catalyst structure and polyolefin product.In addition to the scientific impact this work will provide support for a continued scientific and economic competitive position of the U.S. in the global polyolefin and chemical industries and support training of future generation of scientists and engineers for science, technology, engineering, and mathematics (STEM) related careers. Importantly, the discovery and development of new technological inventions and innovations of commercial value will support the national economy.