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Cationic crosslinking of solid dgeba resins with ytterbium(III) trifluoromethanesulfonate as initiator

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Abstract

Solid bisphenol-A epoxy resin of medium molecular mass was cured using a Lewis acid initiator (ytterbium(III) trifluoromethanesulfonate) in three different proportions (0.5, 1 and 2 phr). A kinetic study was performed in a differential scanning calorimeter. The complete kinetic triplet was determined (activation energy, pre-exponential factor, and integral function of the degree of conversion) for each system. A kinetic analysis was performed with an integral isoconversional procedure (free model), and the kinetic model was determined both with the Coats-Redfern method (the obtained isoconversional value being accepted as the effective activation energy) and through the compensation effect. All the systems followed the same isothermal curing model simulated from non-isothermal ones. The growth-of-nuclei Avrami kinetic model A3/2 has been proposed as the polymerization kinetic model. The addition of initiator accelerated the reaction especially when 2 phr was added. 0.5 and 1 phr showed very few kinetic differences between them.

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Authors and Affiliations

  1. Área de Ciencia de los Materiales, Deparment d'Enginyeria de Sistemes Industrials i Disseny, , Universitat Jaume I, Spain, Avda Vinent Sos Baynat s/n, 12071

    García SJ

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

    Ramis X

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

    Serra A

  4. Centro de Biomateriales, Universitat Politècnica de València, Valencia, Spain, E-46071

    Suay J

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  1. García SJ
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  2. Ramis X
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Correspondence to García SJ .

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García, S., Ramis, X., Serra, A. et al. Cationic crosslinking of solid dgeba resins with ytterbium(III) trifluoromethanesulfonate as initiator . J Therm Anal Calorim 83, 429–438 (2006). https://doi.org/10.1007/s10973-005-7276-5

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