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Polar migration behavior of phosphonate groups in phosphonate esterified acrylic grafted epoxy ester composites and their role in substrate protection
- Source :
- e-Polymers, Vol 20, Iss 1, Pp 636-650 (2020)
- Publication Year :
- 2020
- Publisher :
- De Gruyter, 2020.
-
Abstract
- Epoxy resin is widely used in metal surface protection, because of corrosion resistance and adhesion. However, it’s water solubility, oxygen, and water impermeability are not enough. In this paper, linoleic acid (LOFA) and epoxy resin (E20) were used to synthesize epoxy ester (EL) and grafted with phosphonate esterified acrylic resin (AR-P) to prepare acrylic grafted epoxy ester (EL@AR-P). After modification, water solubility and film-forming property were improved, and the oxygen transmission rate (OTR) and water vapor transmission rate (WVTR) decreased. At the addition of PM-2 at 2%, the OTR, WVTR, and water-uptake rate decreased by 12.9%, 25.0%, and 12.1%, respectively. Subsequently, the modified material was subjected to electrochemical impedance spectroscopy. The low-frequency impedance of EL@AR-P2 is three times higher than EL@AR-P0. After 16 days of immersion, the low-frequency impedance of EL@AR-P2 is 20 times higher than EL@AR-P. Energy dispersive spectrometer and X-ray photoelectron spectroscopy results showed that the P elements were concentrated on the substrate surface and found the presence of P–O–Fe bonds, demonstrating that the phosphonate groups were migrated to the substrate surface to form a chelate layer with the substrate and enhancing the coating adhesion and corrosion resistance. This paper modifies the molecular structure of epoxy resin, which is expected to be an excellent material for anti-corrosion coatings.
- Subjects :
- Materials science
Polymers and Plastics
General Chemical Engineering
02 engineering and technology
anti-corrosion coatings
010402 general chemistry
01 natural sciences
chemistry.chemical_compound
Polymer chemistry
Physical and Theoretical Chemistry
chemistry.chemical_classification
phosphorylation
grafted epoxy esters
Industrial chemistry
Substrate (chemistry)
polar migration
Epoxy
Polymer
waterborne acrylic resins
021001 nanoscience & nanotechnology
Phosphonate
0104 chemical sciences
lcsh:TP1080-1185
chemistry
lcsh:Polymers and polymer manufacture
visual_art
visual_art.visual_art_medium
Polar
0210 nano-technology
Subjects
Details
- Language :
- English
- ISSN :
- 16187229
- Volume :
- 20
- Issue :
- 1
- Database :
- OpenAIRE
- Journal :
- e-Polymers
- Accession number :
- edsair.doi.dedup.....fbdeeb52bf1991fd9094571699c3e6a8