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Epoxy/Zn-Al-Co3 Ldh Nanocomposites: Curability Assessment Publisher



Karami Z1 ; Aghazadeh M1 ; Jouyandeh M1 ; Zarrintaj P2 ; Vahabi H3, 4 ; Ganjali MR1, 5 ; Torre L6 ; Puglia D6 ; Saeb MR7
Authors
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Authors Affiliations
  1. 1. Center of Excellence in Electrochemistry, School of Chemistry, College of Science, University of Tehran, Tehran, Iran
  2. 2. Polymer Engineering Department, Faculty of Engineering, Urmia University, Urmia, Iran
  3. 3. Laboratoire Materiaux Optiques, Photoniques et Systemes, CentraleSupelec, Universite Paris-Saclay, Metz, 57070, France
  4. 4. Universite de Lorraine, CentraleSupelec, LMOPS, Metz, F-57000, France
  5. 5. Biosensor Research Center, Endocrinology and Metabolism Molecular-Cellular Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
  6. 6. University of Perugia, Department of Civil and Environmental Engineering, Strada di Pentima 4, Terni, 05100, Italy
  7. 7. Department of Resin and Additives, Institute for Color Science and Technology, Tehran, P.O. Box: 16765-654, Iran

Source: Progress in Organic Coatings Published:2020


Abstract

In this work, the curability of epoxy nanocomposite consisting of Zn-Al layered double hydroxide (LDH) intercalated with carbonate anion (CO3) was studied via nonisothermal differential scanning calorimetry (DSC) by the aid of Cure Index (CI). The hydrothermal-assisted constant pH coprecipitation method was used in synthesis of lamellar LDH and the resulting structure was confirmed by FTIR, XRD and TGA/DTGA analyses. From the CI point of view, the cure state of epoxy/Zn-A-CO3-LDH nanocomposite was Poor at heating rates of 2 (low) and 10 (high) ºC/min. By contrast, crosslinking of epoxy resin was facilitated in the presence of Zn-Al-CO3-LDH at intermediate heating rates of 5 and 7 °C/min due to intensified ring opening reaction of epoxy under the Lewis acid effect of Zn metal, which changed the cure label of epoxy/Zn-Al-CO3-LDH nanocomposite from Poor to Excellent. © 2019 Elsevier B.V.
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