Viscoelastic properties of syntactic foam reinforced with short sisal fibers

Ghamsari, Ali Kadkhoda; Zegeye, Ephraim; Woldesenbet, Eyassu

doi:10.1177/0021998313514258

Cited by 15 publications

(9 citation statements)

References 30 publications

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“…[1][2][3] The significances of using natural fiber reinforced polymer composites are multifold, with few being, environmental friendly, less health problem, low cost, and comparative thermal and mechanical properties when compared with synthetic fiber reinforced composites. Many natural fibers such as sisal, 4 kenaf, 5 coir, 6 and jute 7 fibers have proven valuable alternative to synthetic fibers. Over the past 10 years, the development of banana fiber reinforced composites has also attracted significant research interest.…”

Section: Introductionmentioning

confidence: 99%

Nanoclay infused banana fiber and its effects on mechanical and thermal properties of composites

Mohan

Kanny

2015

Journal of Composite Materials

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The objective of this work is to infuse nanoclay particles into the banana fiber and study the morphological and structural characteristics. Nanoclays were infused into the fibers by shear induced force with the aid of alkaline (NaOH) chemical treatment. About 6 wt.% of nanoclays were infused into the banana fibers by this method. The short banana fiber reinforced epoxy composites were prepared by resin casting method in which the critical length (l c ) and critical volume fraction (V fc ) of the fibers were determined. The nanoclay infused fibers were compared with untreated and alkaline treated fibers. The result suggests a positive effect on tensile, interfacial, and thermal properties of fibers due to nanoclay infusion. The tensile, shear, and dynamic mechanical analysis (DMA) of composites were studied, and the result shows superior improvement of these properties in nanoclay infused fiber composites.

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Section: Introductionmentioning

confidence: 99%

Nanoclay infused banana fiber and its effects on mechanical and thermal properties of composites

Mohan

Kanny

2015

Journal of Composite Materials

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“…The improved E' values compared to NE at 50°C and 60°C can be attributed to good interaction and interfacial bonding between the HGM and NE molecules during mixing resulting in imcreased flexural strength of SFC mostly at lower volume fraction and higher particle sizes [30], [53]. Figure 10 (a-d) shows the loss modulus (E'') of the SFCs which is the viscous response and a measure of the energy dissipated at heat per cycle under the deformation of the composites.…”

Section: Dynamic Mechanical Analysismentioning

confidence: 99%

Analysis of Particle Variation Effect on Flexural Properties of Hollow Glass Microsphere Filled Epoxy Matrix Syntactic Foam Composites

Afolabi¹,

Kanny²,

Mohan³

2022

Preprint

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Syntactic foam has proven to be a good material with a strong structural strength. Understanding filler particle size variation is important in composite material formation especially in syntactic foam because of their numerous applications such as aerospace, marine and structural purposes. In this present work, the effects of particle variation in different sizes (20-24µm, 25-44µm, 45-49µm, and 50-60µm) on the mechanical properties of the syntactic foam composites with focus on flexural strength, modulus, and fracture surfaces were investigated. The particle sizes were varied into five volume fractions (5, 10, 15, 20, and 25vol%). The results shows that highest flexural strength is 89MPa at 5 vol% fraction of 50-60µm particles size variation which is 69% increase than the neat epoxy. This implies that the incorporation of HGM filler volume fraction and size variation has a strong effect on the flexural strength and bending modulus of syntactic foam. The microstructure of the fracture surfaces and the viscoelastic properties was determined and reported accordingly.

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“…Dynamic mechanical analysis is one of the most appropriate method to investigate relaxation events. 36 It has been demonstrated that the interpretation of viscoelastic relaxation strength in polymers depends on the tangent of the phase angle (tand) or real (in-phase) or imaginary (out-of-phase) components of storage and loss modulus, respectively. 37 The glass transition temperature of a material, also referred as a-transition, is normally considered as the temperature-dependent peak of tand (Figure 6).…”

Section: Effect Of Fillers On Apparent Activation Energy For Viscoelastic Relaxationmentioning

confidence: 99%

Reuse potential of functionalized thermoplastic waste as reinforcement for thermoset polymers: Mechanical properties and erosion resistance

Kovačević

Brzić

Krušić

et al. 2021

Journal of Composite Materials

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Two types of polymer waste materials, poly(ethylene terephthalate) (PET) and polycarbonate based Colombian Resin (CR-39), were used for the designing of fully recycled composite materials. Waste PET was employed for the synthesis of thermoset unsaturated polyester resin (UPR), while CR-39 was used as reinforcement in the UPR matrix. Prior to mixing, CR-39 particles were subjected to oxidation and chemical activation using acids/base and ethanol amine, respectively. The effect of the modifier type and variable loading of the activated CR-39 particles on mechanical and dynamic-mechanical properties of the corresponding composites was investigated. The greatest improvement in the tensile and flexural strength of UPR resin was achieved with the composite containing 0.5 wt% of amine activated filler particles, 96.0% and 62.2%, respectively. The Arrhenius equation was used to calculate the activation energy for glass transition from dynamic mechanical properties measured at various frequencies. The activation energy of the main transition for UPR resin and composites were calculated to be 173 and 350 kJ·mol−1 indicating that reinforcement results in an increase in the energy barrier to macromolecules viscoelastic relaxation. In addition, erosion resistance was studied during exposure of samples to cavitation tests. According to the obtained results, these materials can be applied in construction and mining industry.

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Viscoelastic properties of syntactic foam reinforced with short sisal fibers

Cited by 15 publications

References 30 publications

Nanoclay infused banana fiber and its effects on mechanical and thermal properties of composites

Nanoclay infused banana fiber and its effects on mechanical and thermal properties of composites

Analysis of Particle Variation Effect on Flexural Properties of Hollow Glass Microsphere Filled Epoxy Matrix Syntactic Foam Composites

Reuse potential of functionalized thermoplastic waste as reinforcement for thermoset polymers: Mechanical properties and erosion resistance

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