Browsing by Author "Voto, Gabriele"

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    Formulation based predictive cure kinetics modelling of epoxy resins
    (Elsevier, 2021-10-26) Voto, Gabriele; Sequeira, Leela; Skordos, Alexandros A.
    Matrix formulation for aero-grade high-performance carbon fibre reinforced thermoset composites is a challenging task relying on extensive knowledge of chemistry, legacy information and trial-and-error iterations to identify a suitable pre-polymer resin/curative combination. This work proposes the development and application of a cure kinetics methodology to tailor preliminary matrix formulations focusing on matrix constituents reactivity. The kinetics of a ternary system containing either one epoxy pre-polymer and two amine curatives or two epoxy pre-polymers and one amine curative is approximated as a linear combination of the kinetics of its elementary binary systems containing the corresponding epoxy pre-polymer and amine curative. The method has been evaluated on a wide range of epoxy/amine formulations and shown to be valid with a reaction rate error lower than 0.003 min−1. The application of this predictive method allows the design of matrix systems with tailored reactivity and cure time without extensive experimentation.
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    Formulation based predictive cure kinetics modelling of epoxy resins: dataset
    (Cranfield University, 2021-11-02 15:19) Voto, Gabriele; Sequeira, Leela; Skordos, Alex
    01.Binary blends.xlsm - it contains the integrated DSC data (i.e. time, temperature, conversion degree and reaction rate) and corresponding data resulting from the application of an autocatalytic model for all binary blends assessed across one dynamic and two isothermal profiles; it also includes the reaction rate errors between experiment and prediction. 02.Ternary blends.xlsm - it contains the integrated DSC data (i.e. time, temperature, conversion degree and reaction rate) and corresponding data resulting from the application of the Formulation Ratio Superposition (FRS) for all ternary blends assessed across one dynamic and two isothermal profiles; it also includes the reaction rate errors between experiment and prediction in columns labelled 'Rate error across wider dataset' which report reaction rate for a greater sampling rate.
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    Heating rate limits in fast cure processing of thick carbon fibre laminates
    (Convin, 2018-06-25) Skordos, Alexandros A.; Voto, Gabriele