Visible Light Induced RAFT Polymerization of 2-Vinylpyridine without Exogenous Initiators or Photocatalysts

被引:24
|
作者
Luo, Juxiang [1 ,2 ]
Li, Mingchun [1 ]
Xin, Meihua [1 ]
Sun, Weifu [3 ]
Xiao, Wangchuan [2 ]
机构
[1] Huaqiao Univ, Coll Mat Sci & Engn, Xiamen 361021, Peoples R China
[2] Sanming Univ, Sch Resourses & Chem Engn, Sanming 365004, Peoples R China
[3] Univ Birmingham, Sch Chem Engn, Birmingham B15 2TT, W Midlands, England
基金
美国国家科学基金会;
关键词
2-vinylpyridine; blue LED; kinetics; reversible addition fragmentation chain transfer (RAFT); FREE-RADICAL POLYMERIZATION; FRAGMENTATION CHAIN TRANSFER; AMBIENT-TEMPERATURE; DIBENZYL TRITHIOCARBONATE; ULTRAVIOLET-RADIATION; BLOCK-COPOLYMER; 4-VINYLPYRIDINE; CATALYSTS; ACID;
D O I
10.1002/macp.201600141
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
The controlled radical polymerization of 2-vinylpyridine is reported using commercial blue light-emitting diodes as visible light source in the presence of S-1-dodecyl-S-(,-dimethyl--aceticacid) trithiocarbonate without exogenous initiators or photocatalysts. With this system, poly(2-vinylpyridine) with well-regulated molecular weight and narrow dispersity (D) (D = 1.13) and a conversion efficiency of 84.9% is obtained after 9 h irradiation. The polymerization can be instantly switch on or off in response to visible light while maintaining a linear increase in molecular weight with conversion and first order kinetics. These results demonstrate the simplicity and efficiency of the photocatalysts-free, visible light mediated reversible addition fragmentation chain transfer polymerization as a platform to achieve well-defined poly(2-vinylpyridine) under mild conditions.
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页码:1777 / 1784
页数:8
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