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Thermoplastic-modified epoxy resins cured with different functionalities amine mixtures. Kinetics and miscibility study

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Abstract

The kinetics of a poly(methyl methacrylate) (PMMA)-modified epoxy resin cured with different functionalities amine mixtures was analyzed using differential scanning calorimetry (DSC) in both isothermal and dynamic conditions. A delay in the reaction rate was observed which increased with PMMA content. An approach of kinetic features involved in curing was carried out. A linear dependence of preexponential factors of neat systems with modifier content was considered. The approach shows the contribution of other factors including the dilution effect of the functional groups to the observed delay. Fourier transform infrared spectroscopy (FTIR) indicated a noticeable change in the interactions present in neat systems due to the presence of PMMA. On the other hand, a significant influence of the ratio between each amine in the epoxy/amine mixtures on the final physical appearance was observed. At constant curing conditions, materials from completely opaque (phase separated) to transparent (miscible) were obtained with the increase in monoamine content.

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Acknowledgement

M. Blanco wishes to thank University of the Basque Country (UPV/EHU) for her Ph. D. grant. C. C. Riccardi thanks Gobierno Vasco/Eusko Jaularitza for its financial support. The authors also wish to express their gratitude to Ministerio de Educación y Ciencia/Feder (MAT2006-06331 project) and Eusko Jaularitza/Gobierno Vasco (IT-365-07 Grupos Consolidados).

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Authors and Affiliations

  1. “Materials + Technologies” Group. Dpto. Ingeniería Química y Medio Ambiente, Escuela Politécnica, Universidad País Vasco/Euskal Herriko Unibertsitatea, Plaza Europa 1, 20018, Donostia-San Sebastián, Spain

    M. Blanco, M. López, R. Fernández, L. Martín & I. Mondragon

  2. Institute of Materials Science and Technology (INTEMA), University of Mar de Plata and National Research Council (CONICET), Av. Juan B. Justo 4320, 7600, Mar de Plata, Argentina

    C. C. Riccardi

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  1. M. Blanco
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  2. M. López
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  3. R. Fernández
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  4. L. Martín
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  5. C. C. Riccardi
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  6. I. Mondragon
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Correspondence to I. Mondragon.

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Blanco, M., López, M., Fernández, R. et al. Thermoplastic-modified epoxy resins cured with different functionalities amine mixtures. Kinetics and miscibility study. J Therm Anal Calorim 97, 969–978 (2009). https://doi.org/10.1007/s10973-009-0174-5

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  • DOI: https://doi.org/10.1007/s10973-009-0174-5

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