以自由基反應合成官能化高分子

Polymer Functionalization through Radical Reactions

劉英麟(Ying-Ling Liu)

《化學》 81卷2期 (2023/06) Pp. 71-79

https://doi.org/10.6623/chem.202306_81(2).001

摘要

自由基具有高度化學反應活性，除在高分子聚合中扮演重要的角色，在有機化學反應中也有許多運用之處，但因為缺乏可調控性，自由基反應以往在高分子官能化的應用較少。雖然如此，對於不具化學反應活性基團的高分子鏈，自由基反應可以有效活化以及帶入後續官能化反應於高分子鏈上。因此，本文介紹了基於自由基反應的高分子官能化的反應途徑，以利拓展官能化高分子的合成方法，提高分子設計以及性質調控的彈性，包括於高分子鏈生成過氧化基作為自由基前軀體、結合可控自由基聚合反應以及自由基轉移反應的高分子官能化反應、以及以硫元素為前軀體的硫自由基反應等等。

關鍵字

自由基 ； 自由基轉移 ； 臭氧 ； 高分子反應 ； 官能化高分子

並列摘要

Free radicals possess high chemical reactivity and have been employed in radical polymerization and some organic synthesis routes. Due to the high reactivity and poor controllability, radical reactions are not widely employed in polymer reactions and functionalization. As the first step to functionalize inert polymers chains, which do not possess any chemically reactive sites, is chemical activation, the highly reactive radicals should be of potential for polymer functionalization. In this article, some developed radical reaction-based polymerization functionalization approaches are discussed, including ozone-mediated formation of peroxide groups at polymer chains as radical precursors, integration of controlled radical reactions and radical transfer reaction in polymer functionalization, and radical-mediated polymer reactions with sulfur elements.

並列關鍵字

Free radical ； Free radical transfer ； Ozone ； Polymer reaction ； Polymer functionalization