New Approaches to the Ring-Opening Polymerization of Renewable Resource Cyclic Esters

可再生资源环酯开环聚合的新方法

• 批准号: 0236662
• 负责人: William Tolman
• 金额: $ 41.4万
• 依托单位: University of Minnesota-Twin Cities
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-01-15 至 2005-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0236662&HistoricalAwards=false
• 关键词: New; Approaches; Ring; Opening; Polymerization

The foci of this research are twofold. First, new cyclic ester polymerization catalysts that contain two metal ions (Zn2 and/or Co2) bound to binucleating ligands will be prepared and used to catalyze the transformation of lactide (LA) into polylactide (PLA). Second, the physical properties of PLA will be manipulated by the synthesis of a new class of alternating copolymers of lactic acid and a cyclic ether component. The physical properties of the new polymers and blends of the new polymers with PLA will be examined with the goal of developing macromolecular plasticizing agents useful for the toughening of crystalline PLA.With this award, the Organic and Macromolecular Chemistry Program is supporting the research of Drs. William B. Tolman and Marc A. Hillmyer of the Department of Chemistry at the University of Minnesota-Twin Cities. The Principal Investigators will focus their work on the development of efficient, controlled and versatile methods for the synthesis of polymers derived from renewable resources. To this end, the cyclic dimer of lactic acid (LA) will be used as precursor to the aliphatic polyester polylactide (PLA). The design of discrete catalysts for the conversion and manipulation of the physical properties of PLA will be carried out. The project has broader impacts for the environment and as an excellent area for the training of students.

这项研究的重点是双重的。 首先，新的环酯聚合催化剂，含有两个金属离子（锌和/或钴）绑定到双核配体将被制备和用于催化转化的丙交酯（LA）到聚丙交酯（PLA）。 第二，PLA的物理性质将通过合成一类新的乳酸和环醚组分的交替共聚物来操纵。 新的聚合物和新的聚合物与PLA的共混物的物理性能将被检查，目的是开发用于结晶PLA增韧的大分子增塑剂。Tolman和Marc A.明尼苏达大学双城分校化学系的希尔迈尔说。 主要研究人员将专注于开发高效，可控和通用的方法来合成来自可再生资源的聚合物。 为此，乳酸（LA）的环状二聚体将用作脂肪族聚酯聚乳酸（PLA）的前体。将进行离散催化剂的转化和PLA的物理性质的操纵的设计。 该项目对环境产生了更广泛的影响，并成为学生培训的一个很好的领域。