Polymerization Catalysts for the Reversible Switching Between Vinyl Insertion and Ring-Opening Metathesis Polymerization

用于乙烯基插入和开环复分解聚合之间可逆转换的聚合催化剂

基本信息

批准号：
226688656
负责人：
Professor Dr. Michael R. Buchmeiser
金额：
--
依托单位：
Lehrstuhl für Makromolekulare Stoffe und Faserchemie
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2012
资助国家：
德国
起止时间：
2011-12-31 至 2015-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/226688656?language=en
关键词：
Polymerization Catalysts Reversible Switching Between

项目摘要

The project goal is the design, synthesis and evaluation of novel transition metal-based initiators that allow for the controlled and multiple, reversible switching between two polyinsertion-based mechanisms, i.e. vinyl insertion (1-olefin) polymerization (VIP) and ring-opening metathesis polymerization (ROMP). The entire process, i.e. the polymerization of cyclic olefins via both a VIP and ROMP-based mechanism shall be accomplished in the presence of acyclic olefins, e.g. ethylene or styrene. The extent of vinyl insertion polymerization and ROMP shall be governed by temperature. In combination with suitable monomers (ethylene, cyclopentene, cis-cyclooctene, norborn-2-ene, etc.) and reaction conditions, this will allow for the synthesis of unprecedented polymer structures, preferably with short unsaturated (olefinic) sequences. These will not only influence the physical properties of the resulting polymers (Tm, Tg, Youngs Modulus, ), but also allow for a broad spectrum of derivatization reactions, all to be carried out in form of post-polymerization reactions. In this context, we aim at dihalogenation, hydrohalogenation and epoxydation/dihydroxylation reactions as well as graft polymerizations, e.g., via controlled radical polymerization techniques such as atom-transfer radical polymerization (ATRP) and wish to study the properties of the resulting polymers. Finally, if applicable, the polymers shall also be subjected to basic spinning experiments.

该项目的目标是设计、合成和评估新型过渡金属引发剂，允许在两种基于多插入的机制之间进行受控和多重可逆切换，即乙烯基插入（1-烯烃）聚合（VIP）和开环易位聚合（ROMP）。整个过程，即通过基于 VIP 和 ROMP 的机制进行环烯烃聚合，应在无环烯烃（例如无环烯烃）存在下完成。乙烯或苯乙烯。乙烯基插入聚合和ROMP 的程度应受温度控制。与合适的单体（乙烯、环戊烯、顺式环辛烯、降冰片-2-烯等）和反应条件相结合，这将允许合成前所未有的聚合物结构，优选具有短不饱和（烯属）序列。这些不仅会影响所得聚合物的物理性质（Tm、Tg、杨氏模量），而且还允许进行广泛的衍生反应，所有这些反应都以后聚合反应的形式进行。在这方面，我们的目标是二卤化、氢卤化和环氧化/二羟基化反应以及接枝聚合，例如通过原子转移自由基聚合（ATRP）等受控自由基聚合技术，并希望研究所得聚合物的性能。最后，如果适用，聚合物还应进行基本纺丝实验。