Mechanical and thermal behavior dependence on graphite and oxidized graphite content in polyester composites

González‐García, P.; Ramírez-Aguilar, Rodrigo; Torres, Mauricio; Urquiza, Edgar Adrian Franco; May-Crespo, J.; Camacho, N.

doi:10.1016/j.polymer.2018.06.069

Cited by 36 publications

(20 citation statements)

References 21 publications

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“…The incorporation of GNPs into epoxy increased the composite hardness while the fracture strain and toughness were reduced. Similar results have been reported by other authors [7,8,22] concerning the effect of different nanofillers on the strength of the polymer system.…”

Section: Mechanical Characteristicssupporting

confidence: 92%

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Influence of graphene nanoplatelets on mechanical properties and adhesive wear performance of epoxy-based composites

et al. 2021

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Epoxy resin is one of the most widely used thermoset polymers in high-performance composite materials for lightweight applications. However, epoxy has a high coefficient of friction, which limits its tribological applications. In this study, the effect was investigated of different weight fractions of solid lubricant graphene nanoplatelets (GNPs), ranging from 0 to 4.5 wt%, on mechanical and adhesive wear performance of epoxy. Adhesive wear tests covered mild and severe wear regimes. The correlation of tribological and mechanical properties was studied as well. Scanning electron microscopy (SEM) was used to observe the failure mechanisms for both tribological and mechanical samples after each test. The results revealed that the addition of GNPs to the epoxy improved its stiffness and hardness but reduced its fracture strength and toughness. Adhesive wear performance exhibited high efficiency with GNP additions and showed reductions in the specific wear rate, the coefficient of friction, and the induced interface temperature by 76%, 37%, and 22%, respectively. A fatigue wear mechanism was predominant as the applied load increased. Most importantly, severe wear signs occurred when the interface temperature reached the heat distortion temperature of the epoxy. The tribological, and mechanical properties showed only a weak correlation to each other. The addition of GNPs to epoxy by less than 4.5 wt% was highly efficient to improve the wear performance while maintaining the fracture strength and toughness. Fourier transform infrared spectroscopy (FTIR) analysis shows no chemical interaction between the epoxy matrix with GNPs, which implies its physical interaction.

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Section: Mechanical Characteristicssupporting

confidence: 92%

“…Extensively investigated previously, the use of nanofillers has shown a potential improvement of various characteristics of polymers, including their mechanical, thermal, and tribological properties [7,8]. In a complex process like wear, the main challenge is how to balance between these properties.…”

Section: Introductionmentioning

confidence: 99%

Influence of graphene nanoplatelets on mechanical properties and adhesive wear performance of epoxy-based composites

et al. 2021

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“…The T10 value of UP/POSS-GO composites has been remarkably enhanced with the value of UP/POSS-GO-0.30 increased by 69.8° C to that of pure UP. The POSS-functionalized GO is validated as being a mass transfer barrier against the volatile components within the UP matrix, impending the thermal decomposition of UP [56]. The ensuing phenomenon witnesses the single step transition thermal decomposition roughly at 350 °C for UP and their nanocomposites.…”

Section: Thermal Properties Of Up/poss-go Nanocompositesmentioning

confidence: 99%

Novel Unsaturated Polyester Nanocomposites via Hybrid 3D POSS-Modified Graphene Oxide Reinforcement: Electro-Technical Application Perspective

et al. 2020

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The latest trends in technologies has shifted the focus to developing innovative methods for comprehensive property enhancement of the polymer composites with facile and undemanding experimental techniques. This work reports an elementary technique to fabricate high-performance unsaturated polyester-based nanocomposites. It focuses on the interactive effect of polyhedral oligomeric silsesquioxanes (POSS)-functionalized graphene oxide (GO) within the unsaturated polymermatrix. The hybrid framework of POSS-functionalized graphene oxide has been configured via peptide bonding between the aminopropyl isobutyl POSS and graphene oxide. The synergistic effect of POSS and graphene oxide paved the way for a mechanism to inculcate a hybrid framework within the unsaturated polyester (UP) via in situ polymerization to develop UP/GO-POSS nanocomposites. The surface-appended POSS within the graphene oxide boosted its dispersion in the UP matrix, furnishing an enhancement in tensile strength of the UP/GO-POSS composites by 61.9%, thermal decomposition temperature (10% mass loss) by 69.8 °C and electrical conductivity by 108 S/m, in contrast to pure UP. In particular, the homogenous influence of the POSS-modified GO could be vindicated in the surging of the limiting oxygen index (%) in the as-prepared nanocomposites. The inclusive property amelioration vindicates the use of fabricated nanocomposites as high-performance nanomaterials in electrotechnical applications.

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“…Currently, the incorporation of nanoparticles as polymer reinforcement has shown huge potential for providing enhancement performances for different applications at very low filler content (lower than 1 wt %) [9,10]. In recent works, they allow an increase of the Glass transition temperature (Tg) of polymers and/or a shift of their continuous working temperature towards higher values [11]. Composite materials added with different kind of nanoparticles can be turn into a solution to implement composites for aerospace applications, specially, when the environmental conditions require high performance behavior from the thermal, mechanical or UV resistant points of view.…”

Section: Introductionmentioning

confidence: 99%

Thermal Numerical Analysis of the Primary Composite Structure of a CubeSat

Piedra

Torres

Ledesma³

2019

Aerospace

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A thermal computational analysis for the composite structure of a CubeSat is presented. The main purpose of this investigation is to study the thermal performance of carbon fibre/epoxy resin composite materials with Zinc Oxide nanoparticles in order to be used in the panels of the primary structure of a CubeSat. The radiative heat fluxes over each composite panel are computed according to the orbit trajectory and they are utilized as boundary conditions for the analysis. The direct solar, albedo and Earth infrared radiation fluxes are considered in this study. The model implementation, including the computation of the orthotropic thermal conductivity of the composite material is presented. The thermal simulations were performed for three different orbit inclination angles: the selected mission ( β = 57 ∘ ), the worst hot ( β = 90 ∘ ) and the worst cold ( β = 0 ∘ ). The temperature ranges in the electronic boards are analyzed in order to show that are into the operating limits of each electronic component.

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Mechanical and thermal behavior dependence on graphite and oxidized graphite content in polyester composites

Cited by 36 publications

References 21 publications

Influence of graphene nanoplatelets on mechanical properties and adhesive wear performance of epoxy-based composites

Influence of graphene nanoplatelets on mechanical properties and adhesive wear performance of epoxy-based composites

Novel Unsaturated Polyester Nanocomposites via Hybrid 3D POSS-Modified Graphene Oxide Reinforcement: Electro-Technical Application Perspective

Thermal Numerical Analysis of the Primary Composite Structure of a CubeSat

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