Search
An attempt to mechanistically explain the viscoelastic behavior of transparent epoxy/starch-modified ZnO nanocomposite coatings
Abstract
The effects of bare and starch-modified ZnO (ZnO-St) nanoparticles on viscoelastic and mechanical properties are studied by dynamic mechanical and tensile analyses. Transparent epoxy-based nanocomposite films are prepared by incorporating bare or starch-modified ZnO particles into the epoxy matrix. The results demonstrated that ZnO particles hindered the curing reactions and hence the final properties of the cured epoxy. As a result, glass-transition temperature (Tg) and crosslinking density demoted. However, starch as a surface modifier compensated for the undesired effects of ZnO in a way that by enhancing the curing reactions through autocatalytic mechanism, Tg and crosslinking density increased. The storage moduli for epoxy, epoxy/ZnO and epoxy/ZnO-St are accordingly as 13.84, 3.95 and 19.54 MPa. Therefore, the molecular weight between the entanglements is calculated as 0.2878, 1.0089 and 0.2039 in the same order. Moreover, considering the peaks of the tanδ diagrams, Tgs for epoxy, epoxy/ZnO and epoxy/ZnO-St are obtained as 95.95, 100.16 and 101.24 °C, respectively. Comparing epoxy/ZnO-St nanocomposite to epoxy, it can be inferred that the network becomes tougher in the elastic region and then becomes softer passing this region. Mechanistic sketches of epoxy network formation in the presence of bare and surface-treated nanoparticles are discussed.
Citations
-
4 1
CrossRef
-
0
Web of Science
-
4 3
Scopus
Authors (7)
-
Morteza Ganjaee
- Institute for Color Science and Technology Department of Nanomaterials and Nanocoatings
-
Henri Vahabi
- Université de Lorraine, Laboratoire MOPS
-
Xavier Gabrion
- FEMTO-ST Institute, Department of Applied Mechanics, UMR 6176, University Bourgogne-Franche-Comté, CNRS/ENSMM/UFC/UTBM
-
Pascal Laheurte
- Universite de Lorraine, Laboratoire LEM3
-
Payam Zarrintaj
- University of Tehran College of Engineering, School of Chemical Engineering
-
Mohammad Saeb
- Institute for Color Science and Technology 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. 119,
pages 171 - 182,
ISSN: 0300-9440 - Language:
- English
- Publication year:
- 2018
- Bibliographic description:
- Ganjaee M., Vahabi H., Gabrion X., Laheurte P., Zarrintaj P., Formela K., Saeb M.: An attempt to mechanistically explain the viscoelastic behavior of transparent epoxy/starch-modified ZnO nanocomposite coatings// PROGRESS IN ORGANIC COATINGS. -Vol. 119, (2018), s.171-182
- DOI:
- Digital Object Identifier (open in new tab) 10.1016/j.porgcoat.2018.02.016
- Verified by:
- Gdańsk University of Technology
seen 146 times
Recommended for you
Transparent nanocomposite coatings based on epoxy and layered double hydroxide: Nonisothermal cure kinetics and viscoelastic behavior assessments
- H. Rastin,
- M. Saeb,
- M. Nonahal
- + 8 authors
Properties of nano-Fe3O4 incorporated epoxy coatings from Cure Index perspective
- M. Jouyandeh,
- N. Rahmati,
- E. Movahedifar
- + 9 authors
Bulk-Surface Modification of Nanoparticles for Developing Highly-Crosslinked Polymer Nanocomposites
- M. Jouyandeh,
- M. Ganjali,
- M. Aghazadeh
- + 3 authors
Acid-aided epoxy-amine curing reaction as reflected in epoxy/Fe3O4 nanocomposites: Chemistry, mechanism, and fracture behavior
- M. Jouyandeh,
- M. Shabanian,
- M. Khaleghi
- + 6 authors