Synthesis and characterization of epoxy resins containing imine group and their curing processes with aromatic diamine

Kaya, İsmet; Gül, Murat; Şenol, Dilek

doi:10.1080/10601325.2019.1596747

Cited by 9 publications

(4 citation statements)

References 15 publications

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“…We hope that new results of this paper expand the further investigations of the properties and technology process of production of epoxy diane resins with improved characteristics, and may be useful to develop the perspective polymer composites based on it. 41–45…”

Section: Discussionmentioning

confidence: 99%

Kinetics of epoxy resin optical characteristics during ultrasonic processing

Kovaleva

Савотченко

2021

Journal of Composite Materials

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In this paper, the ultrasonic processing of composite based on epoxy resin ED-20 filled by nanoparticle silicon–containing additives PDMS-5 and HDK during its preparation is studied. Changes in optical transmittance spectra of organosilicon gel (PDMS-5+HDK) and of composite ED-20+L-20+(PDMS-5+HDK) are reported. The observed optical transmission changes were modeled from the experimental results. New phenomenological model describing the kinetics of a change in transmittance with ultrasonic processing time of composite is proposed. The nonlinear differential equation of the process is formulated and solved. The solution of equation applies to description of the experimental data of monitoring of transmittance of composite ED-20+L-20+(PDMS-5+HDK) during ultrasonic processing. The nonlinear functions characterized by three plateaus are proposed to describe the experimental data of monitoring of optical properties of organosilicon gel (PDMS-5+HDK) during ultrasonic processing.

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Section: Discussionmentioning

confidence: 99%

Kinetics of epoxy resin optical characteristics during ultrasonic processing

Kovaleva

Савотченко

2021

Journal of Composite Materials

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“…Epoxy resins have interested researchers and various industries due to the great mechanical and physical properties, strong adhesion, thermal stability, resistance to chemical substances and so on. [1][2][3] Beside appropriate physical and chemical features that epoxy resins offer, some deficiencies such as insufficient resistance against UV rays from sunlight have restricted the use of epoxy resins as polymer coatings for surface applications. 4,5 The present ethereal and aromatic groups in epoxy resins because of being a place for photo-initiating are susceptible to decomposition by UV rays.…”

Section: Introductionmentioning

confidence: 99%

UV protective bio-based epoxy/carbon quantum dots nanocomposite coatings: Synthesis and investigation of properties

Madhi

Hadavand

2022

Journal of Composite Materials

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This research focuses on synthesis and study of the properties of castor oil-based epoxy/carbon quantum dots (COEp/CQDs) nanocomposite coatings possessing resistance against UV. First, CQDs were synthesized by pyrolysis of starch using microwave-assisted method and characterized via various spectroscopic and microscopic methods. Next, certain quantity of castor oil as a renewable resource, CQDs with different weight percentages and a curing agent were added to epoxy resin and consequently COEp/CQDs were prepared. Through findings of FTIR, photoluminescence and UV-visible spectroscopy analyses, existent functional groups and fluorescent feature of the nanocomposite coatings were confirmed. UV-vis spectroscopy approved UV resistance of the COEp/CQDs coatings. As concentration of CQDs increased in resin matrix, UV absorption was maximized. The morphology and uniform dispersion of CQDs in the coatings matrix were verified by FESEM analysis. Results of TGA, pull-off adhesion strength and tensile tests, and DMTA analysis proved adding CQDs to the resin matrix led to progress of thermal endurance, adhesion strength, mechanical and viscoelastic properties of the synthesized coatings including an increase in storage modulus and Tg.

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“…A properly cross-linked structure determines the properties of the EP polymer such as high mechanical property 34 , 35 and chemical resistance property. 36 , 37 For linear polymers, the loosening and untangling of macromolecular chains are caused by swelling, resulting in their being penetrated and dissolved. However, the swelling equilibrium will occur when swelling to a certain extent for cross-linked polymers, and they will not be penetrated and dissolved further.…”

Section: Introductionmentioning

confidence: 99%

“…Cross-linking is an effective way to improve the properties of polymers by adjusting their microstructures such as free volume, glass transition temperature, pack density, and the mobility of polymer chains. A properly cross-linked structure determines the properties of the EP polymer such as high mechanical property , and chemical resistance property. , For linear polymers, the loosening and untangling of macromolecular chains are caused by swelling, resulting in their being penetrated and dissolved. However, the swelling equilibrium will occur when swelling to a certain extent for cross-linked polymers, and they will not be penetrated and dissolved further. , The higher the cross-link density, the smaller the degree of swelling when the material reaches the swell equilibrium, and the lower the corresponding permeability.…”

Section: Introductionmentioning

confidence: 99%

Highly Cross-linked Epoxy Coating for Barring Organophosphate Chemical Warfare Agent Permeation

Zhang

et al. 2022

ACS Omega

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Chemical warfare agents (CWAs) can be absorbed in polymeric coatings through absorption and permeation, thus presenting a lethal touch and vapor hazards to people. Developing a highly impermeable polymer coating against CWAs, especially against organophosphate CWAs (OPs), is challenging and desirable. Herein, fluorinated epoxy (F-EP) and epoxy (EP) coatings with different cross-link densities were prepared to resist OPs. The effects of the polymer coating structure, including cross-link density, chemical composition and free volume, on the chemical resistance to dimethyl methylphosphonate (DMMP, Soman simulant) were investigated in detail. Meanwhile, the chemical resistance to Soman and VX was examined. The results reveal that the cross-link density is a critical factor in determining the chemical resistance of the coatings. Highly cross-linked EP and F-EP coatings with dense and solid cross-linked networks can fully bar DMMP and OPs permeation during the test time. At low or medium cross-link densities, the EP coating with a lower retention of DMMP exhibited a higher resistance than the F-EP coating due to the lower interaction with DMMP and smaller free-volume holes and lower relative fractional free volume. These results suggest that increasing the cross-link density is a reasonable approach to control the chemical resistance of polymer networks against OPs.

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Synthesis and characterization of epoxy resins containing imine group and their curing processes with aromatic diamine

Cited by 9 publications

References 15 publications

Kinetics of epoxy resin optical characteristics during ultrasonic processing

Kinetics of epoxy resin optical characteristics during ultrasonic processing

UV protective bio-based epoxy/carbon quantum dots nanocomposite coatings: Synthesis and investigation of properties

Highly Cross-linked Epoxy Coating for Barring Organophosphate Chemical Warfare Agent Permeation

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