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Cationic photopolymerization of epoxy systems initiated by cyclopentadien-iron-biphenyl hexafluorophosphate ([Cp-Fe-biphenyl]+PF6-)

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Summary

A study of the photoinitiated and thermally initiated cationic polymerizations of several epoxy systems with cyclopentadien-iron-biphenyl hexafluorophosphate ([Cp-Fe-biphenyl]+PF6-) photoinitiator has been conducted. [Cp-Fe-biphenyl]+PF6- photointitiator is capable of photoinitiating the cationic polymerization of glycidyl ether and cycloaliphatic epoxides directly on radiation with long-wavelength UV light. Compared with the mono-arene iron complexes, the photoinitiating activity of [Cp-Fe-biphenyl] PF6 is higher than that of mono-arene iron complex I-261. When the photosensitizer benzoyl peroxide (BPO) is employed, [Cp-Fe-biphenyl]+PF6- is rendered much more efficient than diaryliodonium salt SR1012. The thermally initiated polymerization of epoxide / [Cp-Fe-biphenyl]+PF6- system was evaluated by DSC. It was found that the heat polymerization can occur in the systems of TDE85/[Cp-Fe-biphenyl]+PF6-without UV radiation at 71.6. However, the GCC/[Cp-Fe-biphenyl]+PF6- and ERL4221/[Cp-Fe-biphenyl]+PF6- systems are stable under 200°. The dark-cure of the system of epoxides/[Cp-Fe-biphenyl]+PF6- after UV radiation is obvious by DSC measure.

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Authors and Affiliations

  1. College of Chemistry, Beijing University of Chemical Technology, Beijing, P.R. China

    Tao Wang & Zhi H. Wang

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  1. Tao Wang
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  2. Zhi H. Wang
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Correspondence to Tao Wang.

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Wang, T., Wang, Z. Cationic photopolymerization of epoxy systems initiated by cyclopentadien-iron-biphenyl hexafluorophosphate ([Cp-Fe-biphenyl]+PF6-). Polym. Bull. 53, 323–331 (2005). https://doi.org/10.1007/s00289-005-0346-9

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  • DOI: https://doi.org/10.1007/s00289-005-0346-9

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