Tuning the molecular weight distributions of vinylketone-based polymers using RAFT photopolymerization and UV photodegradation
Tuning the molecular weight distributions of vinylketone-based polymers using RAFT photopolymerization and UV photodegradation
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DOI：
10.1039/d1py01129d
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发表时间：
2021-11-05
影响因子：
4.6
通讯作者：
Konkolewicz, Dominik
中科院分区：
文献类型：
--
作者：
Nwoko, Tochukwu;Watuthanthrige, Nethmi De Alwis;Konkolewicz, Dominik
在可逆加成/断裂链转移聚合中，链转移剂的选择已被证明有助于调节某些聚苯基乙烯基酮（PVK）的分散性。利用蓝光自引发的单体PVK合成了均聚物、嵌段共聚物和梯度聚合物。无论聚合物结构或聚合度如何，聚合物分散性的一致趋势被量化，活性较低的链转移剂黄原酸酯的较高负载导致较高的分散性。分散性可以通过在UV照射下乙烯基酮聚合物的光降解来进一步调节。
The choice of chain transfer agent in reversible addition/fragmentation chain transfer polymerization has proven to be instrumental in modulating the dispersity of a certain polyphenyl vinyl ketone (PVK). The monomer, PVK, which can self-initiate when exposed to blue light, was used to synthesize homopolymers, block copolymers by extending with a different monomer and gradient polymers. Regardless of the polymer architecture or degree of polymerization, a consistent trend in polymer dispersity was quantified, with higher loadings of the less active chain transfer agent xanthate leading to higher dispersities. The dispersity could be further modulated by photodegradation of vinyl ketone polymers under UV irradiation.