Thermal Stability and Decomposition Study of Epoxy/Clay Nanocomposites

Dzuhri, S.; Yuhana, Nor Yuliana; Khairulazfar, M.

doi:10.17576/jsm-2015-4403-16

Cited by 8 publications

(5 citation statements)

References 15 publications

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“…It was suggested from the previous study that longer polymer chain can be easily attacked to form radicals as compared to shorter polymer chain that was more stable. 14 Additionally, it was possible that increased aggregation and stacking of the silicate layers of Bt with increasing loading of Bt in the loading ratio of CaCO 3 /Bt have a destabilizing effect on the composites. The reason was due to the aggregation of silicate layers that can act as a heat source.…”

Section: Resultsmentioning

confidence: 99%

Curing characteristics and mechanical and aging properties of ethylene propylene diene monomer/calcium carbonate/bentonite hybrid composites

Mat

Ismail

Othman

2016

Journal of Elastomers & Plastics

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Ethylene propylene diene monomer (EPDM)/calcium carbonate/bentonite (Bt) hybrid composites were prepared via a laboratory size two-roll mill. In this work, loading ratio of calcium carbonate to Bt was varied, that is, 30/0, 5/25, 15/15, 25/5 and 0/30 parts per hundred rubber. The effect of partial replacement of calcium carbonate with Bt on the curing characteristics, tear properties, morphology, aging and fatigue life of the hybrid composites was studied. On increasing Bt loading, cure time, scorch time and maximum torque of EPDM/calcium carbonate (CaCO3)/Bt composites decreased, whereas minimum torque increased. The tear strength and fatigue life of EPDM/CaCO3/Bt hybrid composites showed improvement with increasing Bt loading. The results also showed that the retention of aging of EPDM/CaCO3/Bt hybrid composites decreased with increasing Bt loading.

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Section: Resultsmentioning

confidence: 99%

Curing characteristics and mechanical and aging properties of ethylene propylene diene monomer/calcium carbonate/bentonite hybrid composites

Mat

Ismail

Othman

2016

Journal of Elastomers & Plastics

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“…It has been established in the literature that the inclusion of fillers increase the thermal stability of the composite system (Dzuhri & Yuhana, 2015;Gu & Liang, 2003). The results revealed that the inclusion of montmorillonite and 5-hydroxytryptophan improved the thermal degradation of the composites.…”

Section: Thermo-gravimetric Analysis (Tga)mentioning

confidence: 92%

Corrosion behavior of 5-hydroxytryptophan (HTP)/epoxy and clay particle-reinforced epoxy composite steel coatings

et al. 2020

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The corrosion behavior of 5-hydroxytryptophan (HTP), and clay particulate reinforced epoxy coatings is studied on a steel substrate that is used widely in pipelines and tanks. The corrosion behavior was studied in sodium chloride (3.5 wt. % NaCl) solutions that simulate potential seawater exposure at pH 3 and 7. X-ray diffraction (XRD) and Scanning Electron Microscopy (SEM) were used for microstructural characterization of the samples. The thermal stability was characterized using Thermogravimetric Analysis (TGA). The underlying corrosion reactions and reaction products were also elucidated via Fourier Transform Infrared Spectroscopy (FTIR). Electrochemical impedance spectroscopy (EIS) and in-situ observations of interfacial blisters were used to study the underlying degradation mechanisms. Electrochemical impedance spectroscopy revealed that for prolonged exposure of about 90 days and above, the composite materials exhibited better corrosion resistance at a pH of 3 as seen by the higher diameter of the Nyquist plot. Fewer corrosion products were observed on the scribed areas of the HTP samples in the scribe test in pH of 3 corroding environment. This signifies improved adhesion of the coatings in that environment for the HTP/epoxy coatings. The results obtained also show that a 1 mm blister size was observed in the pristine epoxy sample while no ABOUT THE AUTHOR Ngasoh Fayen Odette obtained a Bachelor degree in Chemistry and Materials Science from the University of Buea, Cameroon in 2010. She also received her M.Sc. in Materials Science and Engineering from the African University of Science and Technology (AUST) in Abuja, Nigeria in 2013. She is actively involved in the research and design of composites using locally sourced materials. She also extensively works in the characterization of these materials for better understanding of their underlying properties. She is certain that the finding from her work will be of interests to researchers in the world of corrosion and composite coatings.

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“…Polymer-clay nanocomposites based on layered silicates (MMT) have been widely used in many branches of technology. The organoclays, due to their high aspect ratio and unique intercalation/exfoliation characteris-tics, are commonly used for improving, e.g., mechanical [1], thermal [2] and barrier properties [3]. The wide application of these fillers in plastics processing results in the fact that rheological properties of nanocomposites are also an important area of research.…”

Section: Wpływ Modyfikowanych Bentonitów Na Proces Sieciowania żYwicymentioning

confidence: 99%

Effect of modified bentonites on the crosslinking process of epoxy resin with alifphatic amine as curing agent

Oliwa

Bulanda

et al. 2019

Polimery

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In this work the influence of modified bentonites on the process of epoxy crosslinking with triethylenetetramine (TETA) was investigated. Bentonites (BS) modified with quaternary phosphonium (QPS) and ammonium (QAS) salts were used as a nanofiller in the epoxy matrix (EP) in the amounts of 1 and 3 wt %. Gel time of the compositions was investigated using rotational rheometer at 30, 45 and 60 °C and activation energies of the compositions were determined. The storage G' and loss G" moduli crossover criterion was used to determine the nanocomposites gel time variation. On the basis of the obtained results, it was found that the addition of modified aluminosilicates decreased the gel time of epoxy compositions at 30 and 45 °C, while at 60 °C it increased compared to unmodified epoxy resin. The obtained results indicate that the amount of modified aluminosilicate and the type of salt influence the reactivity of epoxy compositions. Among the tested systems, the most reactive was the composition of EP+3%BSQPS1, because the gel time at 30 °C and activation energy decreased by 1500 s and 8 J/mol, respectively, in relation to the unfilled EP resin. A more catalytic effect was observed in the case of bentonites modified with quaternary phosphonium salts, which may be associated with lower phosphorus electronegativity in relation to nitrogen and a lower viscosity of these systems.

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Thermal Stability and Decomposition Study of Epoxy/Clay Nanocomposites

Abstract: This study utilized the incorporation of nanoparticle filler into an epoxy system to study the effect of different nanosized montmorillonite (MMT)

Cited by 8 publications

References 15 publications

Curing characteristics and mechanical and aging properties of ethylene propylene diene monomer/calcium carbonate/bentonite hybrid composites

Curing characteristics and mechanical and aging properties of ethylene propylene diene monomer/calcium carbonate/bentonite hybrid composites

Corrosion behavior of 5-hydroxytryptophan (HTP)/epoxy and clay particle-reinforced epoxy composite steel coatings

Effect of modified bentonites on the crosslinking process of epoxy resin with alifphatic amine as curing agent

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