Versatile Bimolecular Ring-Closure Method for Cage-Shaped Polymers
Versatile Bimolecular Ring-Closure Method for Cage-Shaped Polymers
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笼状聚合物的多功能双分子闭环方法
DOI：
10.1021/acs.macromol.1c00949
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发表时间：
2021-07
期刊：
影响因子：
5.5
通讯作者：
Ke Zhang
中科院分区：
文献类型：
--
作者：
Yuanxing Zhang;Ying Wu;Yilin Zhao;Liangcai Zhang;Ke Zhang
A scalable bimolecular ring-closure method was reported to prepare cage-shaped polymers using a self-accelerating double-strain-promoted azide–alkyne click reaction (DSPAAC) as the cyclization reaction. The success of this method was illustrated by the formation of four-arm and six-arm cage-shaped polycaprolactone (PCL). The well-defined four-arm and six-arm star PCL with para-ether bonded 2,6-diisopropylphenyl azide terminal groups were prepared by a living ring-opening polymerization and an end group modification process. The four-arm and six-arm cage-shaped PCL were then produced by employing the small linkers containing two or three sym-dibenzo-1,5-cyclooctadiene-3,7-diyne (DIBOD) groups to cyclize the corresponding four-arm and six-arm star PCL precursors. By slowly feeding a concentrated star PCL solution into a small volume of small linker solution, the productivities were optimized as around 0.8 g/L/15 h for the formation of four-arm and six-arm cage-shaped PCL with purities above 70%.
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