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F. Ścigalski, A. Obrębowska

Mercaptoalkoxy-thioxanthones as novel ­photoinitiators for free radical polymerization – mechanistic study (in English)

Polimery 2019, No 3, 190


DOI: dx.doi.org/10.14314/polimery.2019.3.4

Summary

Three mercaptoalkoxy-thioxanthones were developed as new photoinitiators for radical polymerization. These compound scan act as either one- or two-component photoinitiating systems.The quenching of the excited triplet states of thioxanthone derivatives by aromatic amines was investigated in dimethyl sulfoxide (DMSO). Based on the mechanism of the intermolecular electron-transfer process, we proposed sequence of reactions leading to the formation of radicals that are capable of ini­tiating the polymerization reaction.


Keywords: free radical polymerization, photoinitiators, mercaptoalkoxy-thioxanthones, laser flash ­photolysis
e-mail: scigal@utp.edu.pl
F. Ścigalski, A. Obrębowska, A. Bajorek (939.5 KB)
Mercaptoalkoxy-thioxanthones as novel photoinitiators for free radical polymerization – mechanistic study