The effect of reactive diluents on curing of epoxy resins and properties of the cured epoxy coatings

Pastarnokienė, Liepa; Jonikaitė-Švėgždienė, Jūratė; Lapinskaitė, Neringa; Kulbokaitė, Rūta; Bočkuvienė, Alma; Kochanė, Tatjana; Makuška, Ričardas

doi:10.1007/s11998-022-00737-4

Cited by 10 publications

(5 citation statements)

References 65 publications

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“…The presence of the epoxy moiety on the oxirane, mono[(C12-14 alkyl) methyl]-based C resin allowed coreaction with the epoxy-amine system. However, the C resin, being mono-functional, cannot significantly impact the curing kinetic of the epoxy-amine system as was observed with dior tri-functional epoxy diluents [25].…”

Section: Thermomechanical Analysismentioning

confidence: 97%

Epoxy-Based Blend Formulation for Dual Curing in Liquid Crystal Display 3D Printing: A Study on Thermomechanical Properties Variation for Enhanced Printability

Tosto,

Saitta,

Latteri

et al. 2024

Polymers

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The aim of this study was to explore the thermal properties of epoxy–acrylate blends for the liquid crystal display (LCD) 3D printing technique. Starting from an epoxy–acrylate blend with a ratio of epoxy to acrylate of 50:50, the effect of adding a reactive monofunctional epoxy diluent was evaluated. The diluent was a resin composed by oxirane, mono[(C12-14 alkyl) methyl] derivatives selected for its low viscosity (i.e., 1.8 Poise) at room temperature and its reactivity. The diluent content varied from 15 to 25 wt% and, for all the formulation, double curing cycles, where thermal curing followed photocuring, were studied. The effect of different curing temperatures was also evaluated. The control of the diluent content and of the curing temperature allowed tailoring of the thermomechanical resin properties while improving the resin’s processability. The glass transition ranged from 115.4 °C to 90.8 °C depending on the combination of diluent content and post-curing temperature. The resin developed displayed a faster processing time tested on a reference part with printing time of 4 h and 20 min that was much lower than the printing times (7 and 16 h) observed for the starting formulations.

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Section: Thermomechanical Analysismentioning

confidence: 97%

Epoxy-Based Blend Formulation for Dual Curing in Liquid Crystal Display 3D Printing: A Study on Thermomechanical Properties Variation for Enhanced Printability

Tosto,

Saitta,

Latteri

et al. 2024

Polymers

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“…Currently, surface coating is one of the most common and effective methods to protect metals from corrosion 2 . Epoxy resins are widely used in surface coating owing to their favorable corrosion resistance, excellent mechanical strength and strong adhesion properties 3 . Nevertheless, the defects such as micropores and cracks generated during the curing process make it unable to provide prolonged anti-corrosion protection.…”

Section: Introductionmentioning

confidence: 99%

Preparation of CeO 2 -PPy nanocomposites to improve the corrosion resistance of epoxy resin coatings

Feng

Liu

et al. 2023

Preprint

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Here, CeO2 was used as the sole oxidant for pyrrole polymerization via in-situ chemical oxidation, and polypyrrole (PPy) was grown on the CeO2 surface to form CeO2-PPy nanocomposites. The morphology of CeO2-PPy nanocomposites was observed using SEM. The electrochemical corrosion behavior of the coatings in 3.5 wt% NaCl solution was investigated through electrochemical impedance spectroscopy (EIS) measurements. After 40 days of immersion, the coating with CeO2-PPy nanocomposite fillers exhibited outstanding anti-corrosion performance, and the |Z|0.01 Hz value exceeded 108 Ω·cm2, which was one order of magnitude higher than of the pure epoxy coating. The enhanced corrosion protection was attributed to the complex passive film produced by the synergistic effect of PPy and cerium(Ⅲ) ions. The results showed that CeO2-PPy nanocomposites can be used as fillers for the corrosion protection of steel substrates.

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“…Epoxy resins in general have high service temperatures and are chemically and mechanically resistant, however they are brittle (Cha et al, 2017;Chandrasekaran et al, 2014). Nonetheless, highly cross-linked epoxy matrices have a restricted deformation and that characterizes the undesirable behavior of the brittle fracture (Kramarenko et al, 2000;Pastarnokienė et al, 2023;Ratna, 2009).…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, due to their properties, epoxy has been extensively produced and widely used in adhesives, surface coatings, corrosion protection, electrical potting and insulation, electronic encapsulants, medical devices, optical components, and structural composites, amongst other applications (Pastarnokienė et al, 2023;Ratna, 2009;Ruiz-Pérez et al, 2008;Utracki e Wilkie, 2014). Epoxy resins based on Bisphenol A are the most used, they have a lower cost and highly incorporation versatility (Ratna, 2009).…”

Section: Introductionmentioning

confidence: 99%

Influence of miscibility of PEG-B-PPG-B-PEG/EPOXY systems on thermal, mechanical and fracture properties

Schuster,

Boaretto,

Silva

et al. 2023

Cuad. Ed. Desar.

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Epoxy matrix blends with poly (ethylene glycol)-block-poly (propylene glycol)-block-poly (ethylene glycol) triblock copolymer (PEG-b-PPG-b-PEG) with 30% PEG blocks were elaborated and investigated. The systems were prepared by the casting method with cure at 100 °C, with different amounts of copolymer in the epoxy matrix, and with the aim of evaluating the influence of the modifier on the properties of the blends. By DSC it was verified that the glass transition temperature relating to the matrix phase decreased in systems with copolymer in relation to neat epoxy, thus the blends formed partially miscible systems. On the other hand, phases separation or microdomains of the block copolymer within the epoxy matrix were not discernible by scanning electron microscopy. In general, the addition of the block copolymer impaired the mechanical properties evaluated in the tensile test. However, the fracture mechanisms observed on the fracture surface of the blends indicate that an improvement in the toughness of the systems may have occurred due to the crack pinning and crack deflection mechanisms.

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The effect of reactive diluents on curing of epoxy resins and properties of the cured epoxy coatings

Cited by 10 publications

References 65 publications

Epoxy-Based Blend Formulation for Dual Curing in Liquid Crystal Display 3D Printing: A Study on Thermomechanical Properties Variation for Enhanced Printability

Epoxy-Based Blend Formulation for Dual Curing in Liquid Crystal Display 3D Printing: A Study on Thermomechanical Properties Variation for Enhanced Printability

Preparation of CeO 2 -PPy nanocomposites to improve the corrosion resistance of epoxy resin coatings

Influence of miscibility of PEG-B-PPG-B-PEG/EPOXY systems on thermal, mechanical and fracture properties

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