复旦大学陈茂团队开发了通过光驱动的间歇和流动可逆失活共聚交替顺序控制的主链含氟聚合物。相关研究成果于2022年1月13日发表于国际一流学术期刊《德国应用化学》。

具有可调节的交替结构的聚合物在实际应用中具有吸引力，尤其是对于主链含氟聚合物。

该文中，研究人员首次通过光驱动工艺，使用新型氟化黄原酸酯试剂，实现了交替顺序调节的受控含氟聚合物合成，实现了三氟氯乙烯和乙烯基酯/酰胺在间歇和流动条件下在环境压力下的按需共聚。该方法可方便地获得含氟聚合物，其具有广泛的交替单元、低分散性和高链端保真度。

此外，建立了一个两步光流平台，以简化从氟乙烯连续向前所未有的嵌段共聚物的原位链延伸。用热性能和表面性能说明了结构控制的影响。研究工作将促进定制含氟聚合物的先进材料工程。

附：英文原文

Title: Main-Chain Fluoropolymers with Alternating Sequence Control via Light-Driven Reversible-Deactivation Copolymerization in Batch and Flow

Author: Mao Chen, Kaixuan Chen, Yang Zhou, Shantao Han, Yinli Liu

Issue&Volume: 2022-01-13

Abstract: Polymers with regulated alternating structures are attractive in practical applications, particularly for main-chain fluoropolymers. We for the first time enabled controlled fluoropolymer synthesis with alternating sequence regulation using a novel fluorinated xanthate agent via a light-driven process, which achieved on-demand copolymerization of chlorotrifluoroethylene and vinyl esters/amides under both batch and flow conditions at ambient pressure. This method creates a facile access to fluoropolymers with a broad fraction range of alternating units, low dispersities and high chain-end fidelity. Moreover, a two-step photo-flow platform was established to streamline the in-situ chain-extension toward unprecedented block copolymers continuously from fluoroethylene. Influences of structural control were illustrated with thermal and surface properties. We anticipate that this work will promote advanced material engineering with customized fluoropolymers.

DOI: 10.1002/anie.202116135

Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202116135