An exponential chemorheological model for viscosity dependence on degree-of-cure of a polyfurfuryl alcohol resin during the post-gel curing stage

J.C. Dominguez, M. Oliet, María Virginia Alonso, L. F. Rodriguez, Bo Madsen

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    Abstract

    In the present study, the chemorheological behavior of a bio-based polyfurfuryl alcohol (PFA) resin has been determined by rheological isothermal tests at different curing temperatures for the post-gel curing stage of the resin, using three different amounts of catalyst (2, 4 and 6 wt %). Instead of modeling the evolution of the complex viscosity using a widely used chemorheological model such as the Arrhenius model for each tested temperature, the change of the complex viscosity as a function of the degree-of-cure was predicted using a new exponential type model. In this model, the logarithm of the normalized degree-of-cure is used to predict the behavior of the logarithm of the normalized complex viscosity. The model shows good quality of fitting with the experimental data for 4 and 6 wt % amounts of catalyst. For the 2 wt % amount of catalyst, scattered data leads to a slightly lower quality of fitting. Altogether, it is demonstrated that the new exponential model is a good alternative to conventional chemorheological models due to its simplicity and suitability
    Original languageEnglish
    JournalI O P Conference Series: Materials Science and Engineering
    Volume139
    Number of pages7
    ISSN1757-8981
    DOIs
    Publication statusPublished - 2016
    Event37th Risø International Symposium on Materials Science: Understanding performance of composite materials – mechanisms controlling properties - Risø Campus, Roskilde, Denmark
    Duration: 5 Sep 20168 Sep 2016

    Conference

    Conference37th Risø International Symposium on Materials Science
    LocationRisø Campus
    Country/TerritoryDenmark
    CityRoskilde
    Period05/09/201608/09/2016

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