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Synthesis and characterisation of an epoxy resin containing fluorene moieties and its cured polymer

W.B. Liu (College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, China)
J. Wang (College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, China)
Q.H. Qiu (College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, China)
M.L. Zhang (College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, China)

Pigment & Resin Technology

ISSN: 0369-9420

Article publication date: 7 November 2008

1572

Abstract

Purpose

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The paper's purpose is to optimise lab‐size synthesis process of a fluorene‐containing epoxy resin, characterise structure of the resulting epoxy resin and evaluate mechanical properties of the cured fluorene‐containing polymers.

Design/methodology/approach

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The synthesis of the fluorene‐containing epoxy resin was accomplished by the polycondensation of 9,9‐bis(4‐hydroxyphenyl)‐fluorene and epichlorohydrin in the presence of quaternary ammonium salt and composite solvent under vacuum. The chemical structure of epoxy resin thus obtained was characterised with FTIR, NMR and MS. The shear strengthes of cured fluorene‐containing epoxy resin were determined and compared with that of cured E‐44 bisphenol A epoxy resin and F‐44 novolac epoxy.

Findings

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The epoxide equivalent weight (EEW) of the fluorene‐containing epoxy resin reached 240‐246 g/mol under optimal epoxidising condition. The resulting epoxy resin exhibited approximate high temperature performance relative to F‐44 novolac epoxy, much better heat resistance than that of E‐44 epoxy resin and lower moisture uptake than that of the two above‐described resins.

Research limitations/implications

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The shear strength of cured fluorene‐containing epoxy resin was relatively low at ambient temperature, whereas was much higher than that of bisphenol A epoxy resin at higher temperature, making it a potential candidate for many applications such as high temperature adhesives, coatings and matrix resins for advanced composite.

Originality/value

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The method for preparation was modified and improved, structure characterisation was comprehensive. The material prepared could find numerous applications as heat‐resistant adhesives and matrix resins.

Keywords

Citation

Liu, W.B., Wang, J., Qiu, Q.H. and Zhang, M.L. (2008), "Synthesis and characterisation of an epoxy resin containing fluorene moieties and its cured polymer", Pigment & Resin Technology, Vol. 37 No. 6, pp. 389-394. https://doi.org/10.1108/03699420810915085

Publisher

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Emerald Group Publishing Limited

Copyright © 2008, Emerald Group Publishing Limited

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