Mechanistic Investigation of Amidinate-Based Catalysts for Living Ziegler-Natta Polymerization

活性齐格勒-纳塔聚合脒基催化剂的机理研究

• 批准号: 0092493
• 负责人: Lawrence Sita
• 金额: $ 38.69万
• 依托单位: University of Maryland, College Park
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-01-01 至 2005-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0092493&HistoricalAwards=false
• 关键词: Mechanistic; Investigation; Amidinate; Based; Catalysts

This award in the Inorganic, Bioinorganic and Organometallic Chemistry Program supports Lawrence Sita, University of Maryland College Park, for work on amidinate-based olefin polymerization catalysts. Compounds such as cyclopentadienyl dimethyl zirconium acetamidinate are activated with borate cocatalysts to provide an active species that promotes the stereospecific living Ziegler-Natta polymerization of olefins and the living cyclopolymerization of non-conjugated dienes. New catalysts will be designed, synthesized and evaluated. Kinetic analyses will probe the detailed mechanism, including identification of factors that control the stereochemistry of the growing polymer chain. Polyolefins are a large class of commercial plastics that includes polyethylene and polypropylene. Block copolymers often show desirable properties such as elasticity, crystallinity, thermoplasticity and solubility. These new specialty plastics are used in the packaging, electronics and textile industries. Metallocene and amidinate catalysts provide routes into new and useful polyolefins.

该奖项在无机，生物有机和有机金属化学计划中支持马里兰州大学公园的劳伦斯·西塔（Lawrence Sita），旨在从事基于阿米丁酸酯的烯烃聚合催化剂的工作。诸如环戊二烯基二甲基二甲基乙酰氨基氨酸酸二甲基二甲基二甲基氨基酸二甲基二甲基二甲基二甲基二甲基二甲基二甲基二甲基二甲基二甲基二甲基二甲基二甲基二甲基氨基氨基酸酯，以提供一种活跃物种，可促进烯烃的立体特异性活体Ziegler-Natta聚合和非偶联dienes的活环聚合。将设计，合成和评估新的催化剂。动力学分析将探测详细的机制，包括鉴定控制生长聚合物链立体化学的因素。聚烯烃是包括聚乙烯和聚丙烯在内的大型商业塑料。块共聚物通常显示出理想的特性，例如弹性，结晶度，热塑性和溶解度。这些新的专业塑料用于包装，电子和纺织工业。金属新世和胺化催化剂提供了新的和有用的聚芬蛋白的路线。