New Photoinitiating Systems for Cationic Polymerization Acting at Near UV and Visible Range
New Photoinitiating Systems for Cationic Polymerization Acting at Near UV and Visible Range, B. Aydogan, Y. Y. Durmaz, M. U. Kahveci, M. Uygun, M. A. Tasdelen, Y. Yagci, Macromol. Symp., 308, 25-34 (2011) DOI: 10.1002/masy.201151005
New photoiniting systems for cationic polymerization acting at near UV
and visible range are described. The applicability of acylgermanes as a new class of
free radical promoters for photoinitiated cationic polymerization is demonstrated.
Moreover, the use of substituted vinyl halides as source for readily oxidizable free
radicals is presented. The polymerization of vinyl ethers can be initiated by the
irradiation of substituted vinyl halides in the presence of Lewis acids such as zinc
halide. Furthermore, possibilities for conducting cationic polymerization at visible
range by using highly conjugated thiophene derivatives are demonstrated. Mechanistic
aspects of all initiating systems are discussed.