Acid-aided epoxy-amine curing reaction as reflected in epoxy/Fe3O4 nanocomposites: Chemistry, mechanism, and fracture behavior - Publication - Bridge of Knowledge

Search

Acid-aided epoxy-amine curing reaction as reflected in epoxy/Fe3O4 nanocomposites: Chemistry, mechanism, and fracture behavior

Abstract

This work seeks to answer the question whether or not the presence of acid functional groups accelerate epoxyamine curing reaction. Epoxy/Fe3O4 nanocomposite was considered as a case, where discussions are based on chemistry, mechanism behind curing reactions and fracture behavior influenced by acid assistance to crosslinking. Fe3O4 magnetic nanoparticles (MNPs) with nanosilica decorative layer (B-MNP) were synthesized and subsequently functionalized with 2-acrylamido-2-methylpropanesulfonic acid (AMPS-MNP), then characetrized for chemical bonding by FTIR spectroscopy. The grafting ratio of ca. 14% was calculated for AMPS-MNP by comparing TGA curves of B-MNP and AMPS-MNP. Epoxy nanocomposites containing B-MNP and AMPS-MNP were then prepared and their potential for epoxy ring opening was compared via nonisothermal DSC analyses at different heating rates. Calorimetric analyses demonstrated that addition of B-MNP to epoxy/amine system increases curing enthalpy from 499 to 532 J/g. By contrast, although curing level was not improved in the presence of AMPS-MNP, curing rate was enhanced remarkably at low heating rates, suggesting strong preference of epoxy to cure with sulfonic acid functional groups rather than amine curing agent, which was chemically and mechanistically explained on account of prematured gelation as well as possible competitive reactions caused by AMPS acid: (i) Chain-growth homopolymerization of epoxide, (ii) Intensified step-growth epoxide ring-opening with amine; and (iii) Reaction of AMPS with amine groups of curing agent that possibly deactivated hardener. Fracture behavior of the blank epoxy, epoxy/B-MNP and epoxy/AMPS-MNP were analyzed using SEM micrographs for interfacial interaction demostration.

Citations

  • 7 2

    CrossRef

  • 6 7

    Web of Science

  • 6 9

    Scopus

Authors (9)

  • Photo of  Maryam Jouyandeh

    Maryam Jouyandeh

    • Université de Lorraine, 4423, Metz, F-57070, France Laboratoire MOPS E.A.
  • Photo of  Meisam Shabanian

    Meisam Shabanian

    • Standard Research Institute (SRI), P.O. Box 31745-139, Karaj, Iran Faculty of Chemistry and Petrochexommical Engineering
  • Photo of  Mahroo Khaleghi

    Mahroo Khaleghi

    • Standard Research Institute (SRI), P.O. Box 31745-139, Karaj, Iran Faculty of Chemistry and Petrochexommical Engineering
  • Photo of  Seyed Paran

    Seyed Paran

    • Iran Polymer and Petrochemical Institute, P.O. Box 14965-115, Tehran, Iran Department of Polymer Processing
  • Photo of  Samira Ghiyasi

    Samira Ghiyasi

    • Central Tehran Branch, Islamic Azad University, Tehran, Iran Department of Environmental Engineering
  • Photo of  Henri Vahabi

    Henri Vahabi

    • Université de Lorraine, 4423, Metz, F-57070, France Laboratoire MOPS E.A.
  • Photo of  Debora Puglia

    Debora Puglia

    • University of Perugia, Strada di Pentima 4, 05100, Terni, Italy Department of Civil and Environmental Engineering
  • Photo of  Mohammad Saeb

    Mohammad Saeb

    • University of Perugia, Department of Civil and Environmental Engineering, Strada di Pentima 4, 05100, Terni, Italy Department of Resin and Additives

Cite as

Full text

full text is not available in portal

Keywords

Details

Category:
Articles
Type:
artykuł w czasopiśmie wyróżnionym w JCR
Published in:
PROGRESS IN ORGANIC COATINGS no. 125, pages 384 - 392,
ISSN: 0300-9440
Language:
English
Publication year:
2018
Bibliographic description:
Jouyandeh M., Shabanian M., Khaleghi M., Paran S., Ghiyasi S., Vahabi H., Formela K., Puglia D., Saeb M.: Acid-aided epoxy-amine curing reaction as reflected in epoxy/Fe3O4 nanocomposites: Chemistry, mechanism, and fracture behavior// PROGRESS IN ORGANIC COATINGS. -Vol. 125, (2018), s.384-392
DOI:
Digital Object Identifier (open in new tab) 10.1016/j.porgcoat.2018.09.024
Verified by:
Gdańsk University of Technology

seen 70 times

Recommended for you

Meta Tags