A new Schiff base epoxy oligomer resin: Synthesis, characterization, and thermal decomposition kinetics

Kaya, İsmet; Doğan, Fati̇h; Gül, Murat

doi:10.1002/app.33843

Cited by 16 publications

(8 citation statements)

References 27 publications

(31 reference statements)

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“…Some research teams have already reported works on vanillin for epoxy synthesis and various applications. A Schiff base synthesized was used for metal ion chelation applications (Scheme ) …”

Section: Biobased Building Blocksmentioning

confidence: 99%

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Biobased Thermosetting Epoxy: Present and Future

et al. 2013

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Section: Biobased Building Blocksmentioning

confidence: 99%

“…A Schiff base synthesized was used for metal ion chelation applications (Scheme 27). 133 Moreover, vanillin was used to synthesize biobased epoxy monomer by a chemoenzymatic process with Candida antartica lipase 134 (Scheme 28). In all cases, epoxy networks exhibited interesting thermal properties.…”

Section: Biobased Building Blocksmentioning

confidence: 99%

Biobased Thermosetting Epoxy: Present and Future

et al. 2013

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“…6,7 Because of the above-mentioned limitations associated with the use of bulk lignin, use of well characterized lignin-derived monomers for thermosets design is most appealing and has received extensive attention. Thermosets including epoxy resins, polybenzoxazines, vinyl ester resins and cyanate ester resins developed from lignin-derived building blocks like eugenol, 8,9 vanillin, 10,11 guaiacol 12 and creosol 13 have been reported. Improved reactivity of lignin-derived monomers rather than bulk lignin provides thermosets that exhibit more satisfactory mechanical and thermal properties.…”

Section: ■ Introductionmentioning

confidence: 99%

Renewable Epoxy Networks Derived from Lignin-Based Monomers: Effect of Cross-Linking Density

Zhao

Abu‐Omar

2016

ACS Sustainable Chem. Eng.

150

123

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Three modification methods, which either improved molecular weight, orientation or the number of functional groups, were employed to increase the cross-linking density of biobased epoxy networks based on 2methoxy-4-propylphenol (dihydroeugenol, DHE). The modifications were realized through o-demethylation and phenol−formaldehyde reactions. Structures of DHE-based monomers and cured networks were characterized by NMR and FTIR spectroscopy. Cross-linking densities of cured networks were calculated using rubber elasticity theory from dynamic mechanical analysis (DMA). Networks with higher cross-link density were found to exhibit greater mechanical and thermal performance as measured by DMA and thermogravimetric analysis. GEDHEO-NOVO, an epoxy monomer featuring all three modification processes, exhibited significant improvements in cross-linking density (0.39 to 9.77 mol/dm 3 ), α-relaxation temperature (T α , 40 to 139 °C) and statistic heat-resistant index temperature (T s , 125 to 153 °C) compared to the unmodified DHEO-based networks.

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“…According to Kissinger's method and using Equation ( 8), the activation energy can be estimated by plotting Ln(β/ T p 2 ) versus 1/T p and fitting a straight line to the data points. [100,101] Slope of lines show E/R values. Calculation of activation energy through this method is shown in Figure S5.…”

Section: Thermal Stability Analysis Of Samplesmentioning

confidence: 99%

Synthesis, characterization, and properties of silicone grafted epoxy/acrylonitrile butadiene styrene/graphene oxide nanocomposite with high adhesion strength and thermal stability

2022

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To improve thermal, mechanical and adhesion properties, epoxy resin was modified with methyl phenyl silicone (MPS), acrylonitrile butadiene styrene (ABS) and graphene oxide (GO). In order to increase compatibility and stability, MPS intermediate was grafted on epoxy resin through condensation reaction. Transmission electron microscopy images showed well dispersion of GO particles in the system proving successfully preparation of the MPS grafted epoxy/ABS/GO nanocomposite. Single lap shear strength for steel‐epoxy/carbon fiber composite joint in sample containing 15% MPS and 2% ABS improved up to 108% compared to neat epoxy. Such an improvement occurred when only 5% MPS, 2% ABS and 0.1% GO were used showing GO could decrease required content of modifiers in this case. Tensile strength of sample containing 5% MPS and 2% ABS was 49.89 MPa and it reached 55.23 MPa by adding 0.1% GO while it was 37.12 MPa in pure epoxy. Nanocomposite modified sample had a residual char of 20 wt%. at 600°C and increment of 30°C in initial degradation temperature and 7°C in maximum degradation temperature compared to pure epoxy. These finding beside 23% increasing in calculated activation energy using Kessinger's and FWO method's proved significantly improved thermal stability of modified epoxy resin. Scanning electron microscope images of fractured surface of specimens showed micro size domains obtained by phase separation cause toughness improvement and crack energy absorption.

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A new Schiff base epoxy oligomer resin: Synthesis, characterization, and thermal decomposition kinetics

Cited by 16 publications

References 27 publications

Biobased Thermosetting Epoxy: Present and Future

Biobased Thermosetting Epoxy: Present and Future

Renewable Epoxy Networks Derived from Lignin-Based Monomers: Effect of Cross-Linking Density

Synthesis, characterization, and properties of silicone grafted epoxy/acrylonitrile butadiene styrene/graphene oxide nanocomposite with high adhesion strength and thermal stability

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