Acyclic Diene Metathesis Polymerization

无环二烯复分解聚合

• 批准号: 9520803
• 负责人: K. Wagener
• 金额: $ 28.5万
• 依托单位: University of Florida
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-07-01 至 1999-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9520803&HistoricalAwards=false
• 关键词: Acyclic; Diene; Metathesis; Polymerization

9520803 Wagener The viability of acyclic diene metathesis (ADMET) polymerization has been demonstrated during the most recent funding period by identifying the functionalities which can be tolerated during this condensation reaction. This new chemistry has led to telechelic hydrocarbon polymers synthesized by depolymerization reactions, as well as to many advanced polymer systems. This grant addresses four generally related research areas which expand upon what has been done thus far with ADMET polymerization. The chemistry of conjugated dienes will be explored. Hydrocarbon conjugated dienes will be examined fipst followed by expansion to aromatic conjugated dienes. The mechanistic enigma associated with terminal aliphatic dienes will be elucidated. Further, the catalyst base for ADMET chemistry will be expanded to include considerably less expensive systems, and speed of these reactions (the kinetics) will be elucidated in such detail that the practical application of these results will be well understood. Thermoreversible network polymers will be made with the goal of improving the recyclability of waste plastics systems, and finally, chiral polymers will be prepared to broaden the utility of this new chemistry. %%% Interest in the commercial utility of ADMET chemistry is high, as judged by the response from American industry during the past three years of NSF support. Particularly significant are applications to the synthesis of specialty polymers, the preparation (via depolymerization) of targeted molecules of high commercial value, and the utility of ADMET chemistry in the reuse of well known commercial polymers, such as polybutadiene. This renewal builds upon all of these opportunities. ***

9520803 Wagener 无环二烯复分解 (ADMET) 聚合的可行性已在最近的资助期间通过确定缩合反应期间可以耐受的官能团得到证明。 这种新的化学反应导致了通过解聚反应合成的遥爪烃聚合物，以及许多先进的聚合物系统。 这笔资助涉及四个普遍相关的研究领域，这些领域扩展了迄今为止在 ADMET 聚合方面所做的工作。 将探索共轭二烯的化学性质。 首先检查烃类共轭二烯，然后扩展到芳香族共轭二烯。 与末端脂肪族二烯相关的机制之谜将被阐明。 此外，ADMET 化学的催化剂基础将得到扩展，以包括相当便宜的系统，并且这些反应的速度（动力学）将得到详细阐明，以便更好地理解这些结果的实际应用。 制造热可逆网络聚合物的目的是提高废塑料系统的可回收性，最后，将制备手性聚合物以扩大这种新化学物质的用途。 %%% 从过去三年 NSF 支持期间美国工业界的反应来看，人们对 ADMET 化学的商业用途的兴趣很高。 特别重要的是在特种聚合物的合成、高商业价值目标分子的制备（通过解聚）以及 ADMET 化学在众所周知的商业聚合物（例如聚丁二烯）的再利用中的应用。这次更新建立在所有这些机会的基础上。 ***