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Epoxy resin modified with a thermoplastic

Influence of modifier and reaction temperature on the phase separation

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Abstract

The effect of cure temperature and modifier proportion on the miscibility of an epoxy–amine system with a thermoplastic modifier was studied by analysis of phase diagrams, morphologies, and glass transitions. Phase diagrams for the system before and during reaction were obtained from a thermodynamic analysis of phase separation using a model based on Flory–Huggins theory. Different types of morphologies were observed and analyzed in function of cure temperature and modifier proportion. The validity of the thermodynamic model was checked by comparing with observed morphologies. Two glass transitions were observed for most of the modified systems indicating that a phase separation was occurred.

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Acknowledgements

The financial support of the Ministerio de Educación y Ciencia (CICYT MAT2007-61677) is gratefully acknowledged.

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Authors and Affiliations

  1. Departamento de Física, E.U.P. Ferrol, Universidad de A Coruña, Avda. 19 de Febrero s/n, 15405, Ferrol, Spain

    Joaquín López, Maite Rico, Carmen Ramírez & Belén Montero

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  1. Joaquín López
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  2. Maite Rico
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  3. Carmen Ramírez
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  4. Belén Montero
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Correspondence to Joaquín López.

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López, J., Rico, M., Ramírez, C. et al. Epoxy resin modified with a thermoplastic. J Therm Anal Calorim 99, 75–81 (2010). https://doi.org/10.1007/s10973-009-0441-5

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