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Influence of the addition of erbium and ytterbium triflates in the curing kinetics of a DGEBA/o-tolybiguanide powder mixture

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Abstract

Solid bisphenol-A epoxy resin (DGEBA) of medium molecular mass was cured using o-tolylbiguanide (TBG) as cross-linking agent. In order to improve the kinetics of the reactive system, two Lewis acid catalysts (erbium(III) and ytterbium(III) trifluoromethanesulfonates) were added in proportions of 1 phr. The kinetic study was performed by dynamic scanning calorimetry (DSC) and the complete kinetic triplet (E, A and g(α)) determined. The kinetic analysis was performed with an integral isoconversional procedure (model-free), and the kinetic model was determined by the Coats-Redfern method and through the compensation effect (IKR). All the systems followed the m=1.5/n=0.5 isothermal curing model simulated from non-isothermal experiments. The addition of a little proportion of ytterbium or erbium triflates accelerated the curing process. In order to extract further information about the role of the lanthanide triflates added to epoxy/TBG systems, the kinetic results were compared with our previous kinetic studies made on DGEBA/lanthanide triflates initiated systems.

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Authors and Affiliations

  1. Àrea de Ciència dels Materials, Departament d’Enginyeria de Sistemes Industrials i Disseny, Universitat Jaume I, Avda Vicent Sos Baynat s/n, 12071, Castellón, Spain

    S. J. García

  2. Departament de Q. Analítica i Q. Orgànica, Facultat de Química, Universitat Rovira i Virgili, C/Marcel·lí Domingo s/n, 43007, Tarragona, Spain

    A. Serra

  3. Laboratori de Termodinàmica, Escola Tècnica Superior Enginyeria Industrial Barcelona, Universitat Politècnica de Catalunya, Diagonal 647, 08028, Barcelona, Spain

    X. Ramis

  4. Centro de Biomateriales, Universitat Politècnica de València, Camino de Vera s/n, 46071, València, Spain

    J. Suay

Authors
  1. S. J. García
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  2. A. Serra
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  3. X. Ramis
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  4. J. Suay
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Correspondence to S. J. García.

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García, S.J., Serra, A., Ramis, X. et al. Influence of the addition of erbium and ytterbium triflates in the curing kinetics of a DGEBA/o-tolybiguanide powder mixture. J Therm Anal Calorim 89, 223–231 (2007). https://doi.org/10.1007/s10973-006-7519-0

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  • DOI: https://doi.org/10.1007/s10973-006-7519-0

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