Laboratory of Applied Chemistry, Karlsruhe Institute of Technology (KIT), Institute of Organic Chemistry, Fritz-Haber-Weg 6, 76131 Karlsruhe, Germany.
Macromol Rapid Commun. 2012 Dec 13;33(23):2023-8. doi: 10.1002/marc.201200487. Epub 2012 Sep 5.
Olefin cross-metathesis is introduced as a versatile polymer side-chain modification technique. The reaction of a poly(2-oxazoline) featuring terminal double bonds in the side chains with a variety of functional acrylates has been successfully performed in the presence of Hoveyda-Grubbs second-generation catalyst. Self-metathesis, which would lead to polymer-polymer coupling, can be avoided by using an excess of the cross-metathesis partner and a catalyst loading of 5 mol%. The results suggest that bulky acrylates reduce chain-chain coupling due to self-metathesis. Moreover, different functional groups such as alkyl chains, hydroxyl, and allyl acetate groups, as well as an oligomeric poly(ethylene glycol) and a perfluorinated alkyl chain have been grafted with quantitative conversions.
烯烃交叉复分解被引入作为一种通用的聚合物侧链修饰技术。在 Hoveyda-Grubbs 第二代催化剂的存在下，具有末端双键的聚（2-恶唑啉）与各种功能丙烯酸酯的反应已经成功进行。通过使用过量的交叉复分解伙伴和 5 mol%的催化剂负载量，可以避免导致聚合物-聚合物偶联的自复分解。结果表明，大体积的丙烯酸酯由于自复分解而减少了链-链偶联。此外，已经定量接枝了不同的官能团，如烷基链、羟基和烯丙基乙酸酯基团，以及低聚聚（乙二醇）和全氟烷基链。
