Time-dependent properties of epoxy resin with imidazolium ionic liquidShow others and affiliations
2021 (English)In: Journal of Applied Polymer Science, ISSN 0021-8995, E-ISSN 1097-4628, Vol. 138, no 46, article id 51369Article in journal (Refereed) Published
Abstract [en]
This study investigates creep and viscoelastic behavior of the diglycidyl ether of bisphenol A (DGEBA) epoxy resin and triethylenetetramine (TETA) system containing an imidazolium ionic liquid (IL), the 1-n-butyl-3-methylimidazolium chloride (C4MImCl). Different time-dependent analysis methods are studied using data from tensile creep, tensile creep/recovery, and three-point and four-point flexural creep tests of epoxy with 1.0 or 4.0 phr of IL. From the results, the composition containing 1.0 phr of C4MImCl, cured at 60°C, presented greater viscoelasticity and crosslink density compared to compositions cured at 30 and 40°C, which was attributed to higher free volume and higher molecular mobility induced by the presence of the IL. In tensile creep tests using the stepped isostress method (SSM), no important degrading effects were found after the addition of 1.0 phr of IL over long time periods. This composition also showed the best overall performance in flexural SSM creep tests.
Place, publisher, year, edition, pages
John Wiley & Sons, 2021. Vol. 138, no 46, article id 51369
Keywords [en]
ionic liquids, resins, thermosets, viscosity and viscoelasticity
National Category
Composite Science and Engineering
Research subject
Polymeric Composite Materials
Identifiers
URN: urn:nbn:se:ltu:diva-86465DOI: 10.1002/app.51369ISI: 000671794700001Scopus ID: 2-s2.0-85109404864OAI: oai:DiVA.org:ltu-86465DiVA, id: diva2:1581904
Note
Validerad;2021;Nivå 2;2021-09-10 (beamah);
Forskningsfinansiärer: Coordenação de Aperfeiçoamento de Pessoal de Nivel Superior – Brasil (CAPES) (Finance Code 001) & the joint CAPES/STINT project.
2021-07-272021-07-272021-12-09Bibliographically approved