Investigation into elastomer nanocomposites based on SBR/epoxy–polyester hybrid/organoclay

Haghnegahdar, M.; Naderi, Ghasem; Bakhshandeh, G. R.; Shokoohi, Shirin; Ehsani, Morteza

doi:10.1179/1433075x13y.0000000099

Cited by 3 publications

(5 citation statements)

References 32 publications

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“…The transition temperature increased up to 267 C and 228 C for the same blends containing 10 phr of Cloisite 15A, indicating the restricted mobility of elastomer chains at the presence of clay [10,16]. The upward shift observed in the storage modulus curves with increasing clay content is the result of high aspect ratio and interactions of the nanofiller with the polymer matrix [17,18].…”

Section: Resultsmentioning

confidence: 75%

Hyperelastic model analysis of stress-strain behavior in polybutadiene/ethylene-propylene diene terpolymer nanocomposites

Shokoohi

Naderi

Mehdi

et al. 2015

J Vinyl Addit Technol

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Micromechanics of elastomer nanocomposite samples based on polybutadiene (BR), ethylene‐propylene diene terpolymer (EPDM) hyperelastic matrixes prepared via melt compounding was investigated using uniaxial tensile analysis. Constitutive hyperelastic models, including Polynomial, Yeoh, Ogden, Arruda‐Boyce, and Van der Waals were used to determine material parameters in incompressible isotropic elastic strain‐energy functions on the basis of a nonlinear least squares optimization method by fitting the data obtained from uniaxial classic experiments. Effect of nanoclay (0, 3, 5, 7, and 10 phr) content on the simulation accuracy was investigated. Simulation results compared with the experimental data suggested that the Ogden model as the most consistent model investigated here. J. VINYL ADDIT. TECHNOL., 23:21–27, 2017. © 2015 Society of Plastics Engineers

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Section: Resultsmentioning

confidence: 75%

Hyperelastic model analysis of stress-strain behavior in polybutadiene/ethylene-propylene diene terpolymer nanocomposites

Shokoohi

Naderi

Mehdi

et al. 2015

J Vinyl Addit Technol

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“…This could be attributed to the interactions between the ring‐opened epoxy groups present in EPH resin and the amine groups on the organoclay layers. Furthermore, hydroxyl groups of esteric resins are shown to establish hydrogen bonds with the hydroxyl groups present in the galleries of organoclay . However, modulus values are lower than the theoretical improvements calculated for “well exfoliated” degree of dispersion (i.e., aspect ratio= 135) through this model.…”

Section: Resultsmentioning

confidence: 80%

“…Glass transition temperature, melting point, onset of flow temperature, and cure initiation reactions of the waste material were investigated using nonisothermal differential scanning calorimetry analysis (not shown here ). Thermal stability and degradation onset temperature were also measured by thermogravimetric analysis (TGA) to ensure the heat stability of hybrid waste resins in the processing conditions applied in this research.…”

Section: Methodsmentioning

confidence: 99%

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An investigation into hyper‐elastic behavior of BR/epoxy‐polyester hybrid/nanoclay nanocomposites

Zoghi

Naderi

Shokoohi³

2017

Polymer Composites

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Butadiene Rubber (BR) was compounded with different compositions of Cloisite 15 and epoxy‐polyester hybrid (EPH), a powder coating waste, using a laboratory‐scale internal mixer at 100°C. Micromechanics of BR/Cloisite 15A (100/3, 100/5, and 100/7), BR/EPH (100/10, 100/20, 100/30, and 100/40) and BR/EPH/Cloisite 15A (100/20/3, 100/20/5, and 100/20/7) compounds were compared to the pure BR through uniaxial tensile and compression measurements. Micromechanical models including Halpin‐Tsai, Leidner‐Woodhams, Pukanszky, and Guth were used to estimate the nanoclay aspect ratio among which Halpin‐Tsai could present more acceptable conclusions confirmed with transmission electron microscopy (TEM). Finite element modeling through constitutive hyper‐elastic models, that is, Arruda‐Boyce, Marlow, Third‐order Ogden, Mooney‐Rivlin, second‐order polynomial, Van der Waals, Neo‐Hooke, and Yeoh was conducted (ABAQUS® software). Simulation results compared with the experimental data suggested that Marlow, Van der Waals, and Yeoh could describe the behavior of this material at whole strain ranges with an acceptable accuracy. POLYM. COMPOS., 39:E2028–E2035, 2018. © 2017 Society of Plastics Engineers

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“…In the processing of thermosetting composites it is important to monitor the gelation properties, in particular the curing time, viscosity increase and thermal effects of this process [4]. The most of these reports concentrated on the effect of the addition of bentonite modified with ammonium salts on the gelation properties of epoxy nanocomposites [5,6]. Peila R. et al [7] reported that the addition of nanoclay modified with quaternary ammonium salts increased viscosity and accelerated the curing process.…”

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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Investigation into elastomer nanocomposites based on SBR/epoxy–polyester hybrid/organoclay

Cited by 3 publications

References 32 publications

Hyperelastic model analysis of stress-strain behavior in polybutadiene/ethylene-propylene diene terpolymer nanocomposites

Hyperelastic model analysis of stress-strain behavior in polybutadiene/ethylene-propylene diene terpolymer nanocomposites

An investigation into hyper‐elastic behavior of BR/epoxy‐polyester hybrid/nanoclay nanocomposites

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

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