Photosensitized cationic polymerization using allyl sulfonium salt

✍ Scribed by Selcuk Denizligil; Rezan Resul; Yusuf Yagci; Ciaran Mc Ardle; Jean-Pierre Fouassier

• Book ID: 102482761
• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 298 KB
• Volume: 197
• Category: Article
• ISSN: 1022-1352
• DOI: 10.1002/macp.1996.021970405

✦ Synopsis

Abstract

The cationic polymerization of cyclic ethers such as cyclohexane oxide (CHO) and vinyl monomers such as butyl vinyl ether (BVE) and N‐vinylcarbazole (NVC) is initiated upon irradiation at λ 380 nm in CH~2~Cl~2~ solution containing an allylic sulfonium salt, namely, 2‐ethoxycarbonyl‐2‐propenylthiophenium hexafluoroantimonate (1) (EMT^+^SbF~6~^−^), and one of the following compounds: benzophenone, anthracene, thioxanthone, perylene or phenothiazine. Electron transfer and hydrogen abstraction mechanisms were proposed for the initiation step. Stable cation radicals of phenothiazine were also prepared, and the cationic polymerization of butyl vinyl ether was initiated by these cation radicals.