科研之友
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摘要
Epoxides bearing aryl groups function as "kick-starters" to markedly accelerate the photoinitiated cationic ring-opening polymerization of oxetane monomers. Thus, it has been observed that the inclusion of a small amount of styrene oxide transforms a sluggishly polymerizing 3-mono- or 3,3-disubstituted oxetane monomer into one that undergoes rapid, exothermic polymerization. Mechanistic studies suggest that the activity of aryl epoxides as "kick-starters" is related to their ability to intercept photogenerated acids to form benzylic cations that rapidly initiate oxetane monomer polymerization by alkylation of the monomer.
- 出版日期2015-5-4
