Microstructure of epoxy matrices

Deev, I. S.; Kobets, L. P.

doi:10.1007/bf00606000

Cited by 6 publications

(4 citation statements)

References 2 publications

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“…Figure 4a,b show the general view of the fracture surfaces. Mirror zones, transition zones, and relief zones are highlighted [56][57][58][59]. In both cases, river-like lines were observed (Figure 4c,d).…”

Section: Scanning Electron Microscopymentioning

confidence: 81%

“…In addition, Figure 4d, showing the fractograms, shows that the sample cured in the presence of the complex has more branches and a smaller object height compared to the standard sample. The standard sample exhibits river-lines with a larger height and more twisting due to its higher plasticity [58,60]. On the other hand, the fracture surface of the sample cured in the presence of the (TPhTz) 2 [CuBr 4 ] complex (Figure 4f) displays diverging branches of parabolas and a lower number of structural objects, indicating a different fracture pattern.…”

Section: Scanning Electron Microscopymentioning

confidence: 99%

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Coordination Compound (2,3,5-Triphenyltetrazolium)2[CuBr4] as Catalyst for the Curing Process of Epoxy Vinyl Ester Binders

Protsenko,

Shakirova

et al. 2023

IJMS

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This article presents a study on the synthesis and catalytic properties of copper complex (TPhTz)2[CuBr4] (here TPhTz is 2,3,5-triphenyltetrazolium). The obtained complex was characterized by various spectroscopic methods. The catalytic properties of the complex were evaluated in the curing of an epoxy vinyl ester system and their effectiveness was compared with that of cobalt octoate (its synonyms are known as Co(Oct)2, cobalt(II) 2-ethylhexanoate, cobalt isocaprylate, etc.). The catalyst was added at an amount of 2 w.%. The results showed that a 8 w.% solution of the complex provides catalytic properties with an activation energy of 54.7 kJ/mol, which is 25.2 kJ/mol higher than a standard curing system with Co(Oct)2. Thus, the solution of (TPhTz)2[CuBr4] in THF/DMSO accelerates the initiator decay process at room temperature, but for a longer time. The authors suggest that the curing mechanism may be accelerated by the appearance of (TPhTz)2[CuIBr3] and free bromine in the system. A strength test of fiberglass-reinforced plastic revealed that the addition of this complex did not lead to a decrease in flexural strength and hardness. Thus, use of the complex allowed for the production of polymer composite products using vacuum-assisted resin transfer molding where an extended injection time was needed.

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Section: Scanning Electron Microscopymentioning

confidence: 81%

Section: Scanning Electron Microscopymentioning

confidence: 99%

Coordination Compound (2,3,5-Triphenyltetrazolium)2[CuBr4] as Catalyst for the Curing Process of Epoxy Vinyl Ester Binders

Protsenko,

Shakirova

et al. 2023

IJMS

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“…(9) were checked for a great number of compositions based on thermosetting and thermoplastic binders. The values of strength obtained are most simply explained by the assumption of the formation of buffer layers; however, the change in strength is observed at a distance between the particles of"3 ~tm, and the buffer layers 1.5 ~tm thick are not typical of epoxy resins [12]. 6).…”

mentioning

confidence: 83%

Effect of dispersed filter particles on the strength behavior of composites

1999

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An attempt is made to find a solution by which the effect of neighboringfiller particles on the strength of composites could be indirectly estimated. The stresses in composites with a great amount of filler are calculated. Composites based on epoxy-resin binder are tested. A comparison of different models shows that the modified Kerner model reflects only the tendency for the compression strength to change with the degree of filling. The relations between the compression strength and the degree offilling are better described by models allowing for constraint of the plastic deformations of the matrix. However, in this case, the effect of the neighboring particles is not properly taken into account.

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“…The structure of the cleavage surfaces was studied by scanning electron microscopy (SEM) on the mesoscale and microscale levels [4][5][6]. The cleavages of the composite samples were mounted with an electroconductive adhesive tape on special metal position tables.…”

Section: Experimental Partmentioning

confidence: 99%

Influence of the type of wood flour and nanoadditives on the structure and mechanical properties of polypropylene-based wood-polymer composites

Fayzullin¹,

Вольфсон²,

Мусин³

et al. 2016

AIP Conference Proceedings

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Abstract. The elastic modulus and yield stress for polypropylene-based wood-plastic composites are studied as dependent on the type and dosage of wood flour, the type of nanofillers and the method of their incorporation. The effect of nanofillers on the WPC structure is also investigated. It is demonstrated that optical and scanning electron microscopy allows one to make a morphological analysis of the WPC structure.

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Microstructure of epoxy matrices

Cited by 6 publications

References 2 publications

Coordination Compound (2,3,5-Triphenyltetrazolium)2[CuBr4] as Catalyst for the Curing Process of Epoxy Vinyl Ester Binders

Coordination Compound (2,3,5-Triphenyltetrazolium)2[CuBr4] as Catalyst for the Curing Process of Epoxy Vinyl Ester Binders

Effect of dispersed filter particles on the strength behavior of composites

Influence of the type of wood flour and nanoadditives on the structure and mechanical properties of polypropylene-based wood-polymer composites

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