FRSFCO - Producción de Investigación

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Author: search.filters.author.Frontini, PatriciaSubject: search.filters.subject.Laminate

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    Mechanical evaluation of laminates based on phenolic resins using lignins as partial substitutes for phenol
    (Bioresources, 2015-10-28) Taverna, María E.; Ollearo, Rocío; Morán, Juan; Nicolau, Verónica V.; Estenoz, Diana; Frontini, Patricia
    Reducing the consumption of phenol during synthesis of phenolic resins is of great technological and scientific interest because of its economic and environmental implications. In this work, the use of hydroxymethylated lignins as a partial replacement for phenol in resol phenol-formaldehyde resins used for the production of decorative laminates was experimentally studied. The work involved: i) the industrial synthesis of traditional and modified resols with 10%w/w of sodium lignosulfonate and kraft-type lignin; ii) the industrial impregnation of kraft-type paper with the produced resins; iii) the production of laminates on both laboratory and industrial scales; and iv) the measurement of their final properties. The mechanical performance of the laminates was evaluated via the determination of the Young modulus, bending strength, biaxial impact strength, and Mode-I interlaminar fracture toughness. The (modified and traditional) laminates exhibited statistically significant differences in mechanical properties. However, the partial lignin replacement did not produce effects that were detrimental effects to the overall performance of the decorative laminates.
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    Synthesis and mechanical properties of laminates based on phenolic resins modified with sodium lignosulfonate.
    (Latin American Applied Research, 2017-05-08) Taverna, María E.; Ollearo, Rocío; Morán, Juan; Nicolau, Verónica V.; Estenoz, Diana; Frontini, Patricia
    The reduction of phenol and/or formalde-hyde consumption during phenolic resin synthesis is of great technological and scientific interest because of its economic and environmental implications. In this work, the addition of sodium lignosulfonate as par-tial replacement of phenol in the phenolic resol base resins used for decorative laminates production is experimentally studied. The work involves: i) the characterization and reactivation of lignosulfonate, ii) the industrial synthesis of traditional and modified resoles by replacement of 10%w/w of phenol, iii) the industrial impregnation of Kraft-type papers with the produced resins, iv) the pro-duction of laminates at laboratory and industrial scale, and, v) the measurement of their final properties. Tensile, bending and impact strength were evaluated. Modified laminates exhibited mechanical properties statistically comparable with those of traditional laminates. Industrial tests were carried out at Centro S.A, San Francisco, Córdoba.