Effect of CTBN Addition on Mechanical Properties of Epoxy Resins Filled with SiO2 Particles.

Kobayashi, Toshirô; Higashihara, Takashi; Yamaya, Hayato; Hosoi, Kazuo; Toda, Hiroyuki

doi:10.2472/jsms.48.1386

Cited by 2 publications

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“…Therefore the interest of many investigators shifted toward working with rigid and nondeformable-type fillers introduced into the polymer base system. In this context, mention may be made of the epoxy system with fillers such as ZrO 2 [9], Al 2 O 3 [10], SiO 2 [11], Boron nitride [12], all known for high hardness and elastically deforming nature. These fillers, though they bring in isotropic properties and higher load bearing capacity to the matrix, are marked by their low toughness values.…”

Section: Introductionmentioning

confidence: 99%

Individual and Combined Roles of CTBN and Fly Ash in Epoxy System under Compression: Correlation between Microscopic Features and Mechanical Behavior

Kishore

Santra

2005

Journal of Reinforced Plastics and Composites

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Epoxy containing fillers of either fly ash or poly(acrylonitrile-co-butadiene), carboxy terminated (CTBN) as single reinforcing material in one program and both the filler materials as hybrid reinforcements into the system in the second were cast and the test coupons cut from the cured slabs were subjected to axial compression strength. The filler proportions in the composites were varied with a view to study the effects of differing characteristics bearing filler materials. The nondeforming, oxide bearing ceramic-type fly ash when incorporated into epoxy showed an increase in compressive strength values with fly ash content up to 10% by weight inclusion after which a drop was noticed. In the case of CTBN, the trend of recording a rise was noticed up to 5% by weight. When the two fillers were introduced simultaneously, the maximum in strength was recorded at a composition constituted by equal amounts of both the fillers comprising a total of 5% by weight. The work was extended to microscopic examination where features like morphology of fillers, the role of matrix-filler interface region as well as the part played by the two fillers when they are present as individual reinforcements were examined. Features such as shear deformation, stepped-appearance, crack blunting and elongation of the rubbery phase, crack pinning, and formation of debonds around the fly ash and CTBN were noticed. The work attempts at correlating the mechanical data to microscopic details. Thus, the drop in strength at higher levels of elastomers (10 and 20% by weight) could be traced to the coalescing of particles. The initial rise in strength noticed in these systems, could be related to the resistance to deformation offered by the well-bonded elastomeric fillers.

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Section: Introductionmentioning

confidence: 99%

Individual and Combined Roles of CTBN and Fly Ash in Epoxy System under Compression: Correlation between Microscopic Features and Mechanical Behavior

Kishore

Santra

2005

Journal of Reinforced Plastics and Composites

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“…With regards to rigid reinforcements, reports are available of composites using brittle fillers such as ZrO 2 [9], Al 2 O 3 [10], SiO 2 [11], and boron nitride [12] with epoxy matrix. But literature in general and performance evaluation in dynamic loading conditions in particular on the hybrid filler-bearing composites, where two divergent-natured reinforcements are used, are difficult to come across barring the work by the present authors where compression parameters are studied [13].…”

Section: Introductionmentioning

confidence: 99%

Impact Studies in Elastomer, Fly Ash, and Hybrid-filled Epoxy Composites: Part I - Room Temperature Curing

Kishore

Santra

2005

Journal of Reinforced Plastics and Composites

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This study involves a system where epoxy as matrix and two reinforcements, namely an elastomer and a less dense oxide known as fly ash, differing in their response to mechanical loading to yield hybrid composite, are used. As rubber particles are known for their resistance to dynamic loading situations, poly(acrylonitrile-co-butadiene), carboxyl terminated, CTBN as the elastomer constitutes the first of the filler. The incorporation of rigid fly ash, as a second filler, has been made to see the change in the behavior in the response to the impact test. Their roles as individual fillers as well as hybrid fillers are studied at various compositions. The directly observed experimental values such as total energy and the derived data like ductility index (DI) are catalogued. While the fly ash-bearing composites show maximum absorption of energy at 3% by weight, the rubber-bearing ones display the same trend at 1%. The values recorded for the hybrid type having 1% were high. The DI showed highest values for the maximum filler bearing compositions in all cases. The scanning electron micrographs of the impact-failed samples helped in understanding the trends seen in the impact data.

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Effect of CTBN Addition on Mechanical Properties of Epoxy Resins Filled with SiO2 Particles.

Cited by 2 publications

References 0 publications

Individual and Combined Roles of CTBN and Fly Ash in Epoxy System under Compression: Correlation between Microscopic Features and Mechanical Behavior

Individual and Combined Roles of CTBN and Fly Ash in Epoxy System under Compression: Correlation between Microscopic Features and Mechanical Behavior

Impact Studies in Elastomer, Fly Ash, and Hybrid-filled Epoxy Composites: Part I - Room Temperature Curing

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