Graphene oxide/vinyl ester resin nanocomposite: the effect of graphene oxide, curing kinetics, modeling, mechanical properties and thermal stability

Arabli, Vahid; Aghili, Alireza

doi:10.1039/c5ra23731a

Cited by 15 publications

(13 citation statements)

References 36 publications

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“…This value is acceptable, since the experimentally determined elongation at break is reported to range between 3.36% and 5.60% of strain. 7,9,48 The Young's modulus values increased with bond conversion: 3.36, 4.11, and 4.73 GPa for the samples with bond conversion of 50%, 70%, and 90%, respectively. This could be ascribed not only to the increase in bond conversion but also to the increase in the average number of cross-links per chain resulting in a more rigid 3D network Experimentally reported Young's modulus values vary between 2.50 and 3.52 GPa.…”

Section: Terminationmentioning

confidence: 99%

A Versatile Computational Procedure for Chain-Growth Polymerization Using Molecular Dynamics Simulations

Demir

Walsh

2019

ACS Appl. Polym. Mater.

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Vinyl ester resins are generated via chain-growth polymerization and are widely used for structural composites. The lack of atomic-scale structural models for these industrially important materials makes the link between their structure and performance challenging to fully elucidate. Despite experimental advances, key questions regarding the structure/property relationship of these resins await atomic-scale explanations. As first steps to address this, we introduce a generalized computational procedure for modeling chain-growth polymerization to generate the structure of these resins and test their thermomechanical properties. Our approach uses an in situ dynamic bond-formation procedure and is informed by known reaction kinetics data. The process is applied to the vinyl ester/styrene resin system, producing structures and properties that are consistent with experimental data. We also introduce comprehensive structural analyses to enhance our interpretation of the predicted properties. Our procedure is broadly applicable to the design and testing of any polymer-based material based on a chain-growth mechanism.

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Section: Terminationmentioning

confidence: 99%

A Versatile Computational Procedure for Chain-Growth Polymerization Using Molecular Dynamics Simulations

Demir

Walsh

2019

ACS Appl. Polym. Mater.

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“…Isoconversional kinetic analysis has indicated that addition of the clays affects the reaction mechanism, in particular suppressing a transition to diffusion control. Arabli and Aghili have reported that the curing reaction of a vinyl ester monomer decelerates (shifts to higher temperature) on addition of 0.3 wt% of graphene oxide. Nevertheless, the isoconversional activation energy has been found to decrease significantly in the presence of graphene oxide.…”

Section: Polymerization and Crosslinkingmentioning

confidence: 99%

Isoconversional Kinetics of Polymers: The Decade Past

Vyazovkin

2016

Macromol. Rapid Commun.

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This article surveys the decade of progress accomplished in the application of isoconversional methods to thermally stimulated processes in polymers. The processes of interest include: crystallization and melting of polymers, gelation of polymer solutions and gel melting, denaturation (unfolding) of proteins, glass transition, polymerization and crosslinking (curing), and thermal and thermo-oxidative degradation. Special attention is paid to the kinetics of polymeric nanomaterials. The article discusses basic principles for understanding the variations in the activation energy and emphasizes the possibility of using models for linking such variations to the parameters of individual kinetic steps. It is stressed that many kinetic effects are not linked to a change in the activation energy alone and may arise from changes in the preexponential factor and reaction model. Also noted is that some isoconversional methods are inapplicable to processes taking place on cooling and cannot be used to study such processes as the melt crystallization.

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“…There is a large number of studies conducted to investigate properties of vinyl ester resin reinforced by micro/nano particles. Vahid Arabli et al studied in curing kinetics, modeling, mechanical properties and thermal stability in graphene oxide/vinyl ester resin nanocomposite [13]. They claimed that with a low content of graphene oxide (0.3%), the matrix became stiffer while the glass transition temperature shifted to a higher value.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Submicron Glass Fiber Reinforced Vinyl Ester Composite

Nhân¹,

Obunai²,

Okubo³

et al. 2019

OJCM

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Vinyl ester (VE) resin inherently has intrinsic brittleness due to its high cross-link density. To improve mechanical performance, micro/nano fillers are widely used to modify this matrix. In present study, glass fiber in submicron scale at low contents was added into VE to prepare submicron composite (sMC). The impact resistance of un-notched sMC degraded with the increase of sGF content while that of notched-sMC remained the unchanged. Flexural properties of sMCs also were the same with that of neat resin. The results of Dynamic mechanical analysis (DMA) test showed the slight increase of storage modulus and the decrease of tan delta value in the case of sMC compared to those of un-filled matrix. However, the Mode I fracture toughness of sMC improved up to 26% and 61% corresponding to 0.3 and 0.6 wt% glass fiber used. The compact tension sample test suggests that there is the delay of crack propagation under tensile cyclic load in resin reinforced by submicron glass fiber. The number of failure cycle enlarged proportionally with the increment of sGF content in matrix.

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Graphene oxide/vinyl ester resin nanocomposite: the effect of graphene oxide, curing kinetics, modeling, mechanical properties and thermal stability

Abstract: The Ea value of cure reaction of the GO/VE nanocomposite decreased. It is concluded that the GO acted as catalyst in the reaction of VE/GO nanocomposite.

Cited by 15 publications

References 36 publications

A Versatile Computational Procedure for Chain-Growth Polymerization Using Molecular Dynamics Simulations

A Versatile Computational Procedure for Chain-Growth Polymerization Using Molecular Dynamics Simulations

Isoconversional Kinetics of Polymers: The Decade Past

Mechanical Properties of Submicron Glass Fiber Reinforced Vinyl Ester Composite

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