期刊
POLYMER CHEMISTRY
卷 7, 期 25, 页码 4246-4253出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6py00808a
关键词
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资金
- Australian Research Council [FT110100411]
- Australian Postgraduate Award (APA)
- Australian Research Council [FT110100411] Funding Source: Australian Research Council
The photolytic stability of various RAFT agents (i.e., thiocarbonylthio-containing compounds) under irradiation from a blue LED light source has been investigated. The effect and implications of efficient photo-fragmentation and potential photo-degradation with regard to their performance in photopolymerization reactions is reported. The stability is found to depend strongly on the structure of the fragmenting (R-) group and the reactivity of the carbon-centered radical formed following photolytic cleavage. This is proposed to be due to the competitive rates of radical recombination and thiyl radical degradation, and has implications on the choice of monomer (as monomer propagation requires reinitiation of the oligomeric/polymeric RAFT agent). These findings can provide guidelines and increase understanding when conducting a photopolymerization employing thiocarbonylthio RAFT agents.
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