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(η6-N-alkylcarbazole) (η5-cyclopentadienyl) iron hexafluorophosphate salts in photoinitiated and thermal epoxy polymerization by Tao Wang; Zhiquan Li; Ying Zhang; Kafssi Hassan; Xiaoning Wang is a Materials Science article available to read on EtoBox.

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## Abstract (η6‐Carbazole)(η5‐cyclopentadienyl) iron hexafluorophosphate salts (CFS PF~6~) are capable of photoinitiating cationic polymerization of epoxy monomers directly upon irradiation with long‐wavelength UV light. To improve the solubility of CFS ferrocenium salts in epoxides, two CFS photoinitiators have been prepared: [cyclopentadiene‐Fe‐__N__‐buylcarbazole] hexafluorophosphate (C4‐CFS PF~6~) and [cyclopentadiene‐Fe‐__N__‐octylcarbazole] hexafluorophosphate (C8‐CFS PF~6~), bearing C4 and C8 alkyl chains, respectively, on the nitrogen atom. Studies with real‐time infrared spectroscopy have shown that C4‐CFS and C8‐CFS photoinitiators exhibit high efficiency in polymerization of 3,4‐epoxycyclohexylmethyl‐3,4‐epoxycyclohexane carboxylate (ERL‐4221) epoxy monomer, but lower efficiency in polymerization of di(2,3‐epoxypropyl)‐3,4‐epoxy‐1,2‐cyclohexanedioate (TDE‐85) epoxy monomer. Benzoyl peroxide (BPO) sensitizer was very effective in improving the photoinitiating activities of CFS in polymerization of both ERL‐4221 and TDE‐85. DSC studies have shown that C4‐CFS and C8‐CFS photoinitiators can also be employed as thermal initiators for the cationic ring‐opening polymerization o

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Author

Tao Wang; Zhiquan Li; Ying Zhang; Kafssi Hassan; Xiaoning Wang

Publisher

Society for Plastic Engineers; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0032-3888)

Published

2009

Language

EN

Field

Materials Science (Physical Sciences)