In this work, a varied amount of acetone was employed to dissolve an epoxy resin and then route followed remove the acetone, simulating frequently used method disperse nanofillers in thermoset matrices. Analyses were carried out address influence residual on curing process properties. The results showed detrimental effect mechanical properties cured due presence also less brittle-like fracture specimen. Fourier transform infrared spectroscopy thermogravimetric analyses additionally...

The authors employed the equilibrium molecular dynamics technique to calculate self-diffusion coefficient and shear viscosity for simple fluids that obey Lennard-Jones 6-12 potential in order investigate validity of Stokes-Einstein (SE) relation pure fluids. They performed calculations a broad range density temperature test SE relation. main goal this work is exactly constant, here denominated by alpha, present Also, modified where fluid raised power usual expression compared classical...

In this work, nanocomposites were prepared by adding a small amount of single walled carbon nanotubes (SWCNTs) to an epoxy resin aiming study the resulting mechanical, viscoelastic and thermal properties nanocomposites. To optimize processing favor homogeneous dispersion SWCNTs on matrix, acetone was used reduce viscosity, increasing diffusion in solution. The epoxy/SWCNTs/acetone systems also sonicated order minimize entanglement SWCNTs. characterized Fourier transform infrared...

In this study, carboxylated (SWCNT-c) and pristine (SWCNT) single-walled carbon nanotubes were randomly dispersed in a hardener prior to mixing it with an epoxy resin. The influence of several parameters on the dispersion process investigated. produced samples characterized by infrared spectroscopy, differential scanning calorimetry, dilatometry, dynamic mechanical analysis, electron microscopy testing (tensile, flexural microhardness). results obtained nanocomposites SWCNT-c suggested that...

The effects of the silanization multi-walled carbon nanotubes and graphene nanoplatelets with 3-APTES on thermal, mechanical electrical properties epoxy nanocomposites were investigated. Nanocomposites containing pristine, oxidized silanized nanoparticles or at two different concentrations (0.15 0.50 vol.%) prepared by in situ polymerization without using solvents. functionalized characterized Fourier-transform infrared, X-ray photoelectron spectroscopy, Raman spectroscopy transmission...

In this study the effects of dispersion carboxylated single-walled carbon nanotubes (SWCNT-c) in epoxy matrices using two different routes were investigated. first route, SWCNT-c dispersed resin solvent and tip sonication. second hardener ways: with without solvent, but both For comparison purposes, neat was also prepared same curing conditions. The samples characterized via mechanical dilatometric testing, raman FTIR analyses, SEM images, tests. An increase 88% found for Young’s modulus...

In this work, nanocomposites with simultaneous dispersion of carbon nanotubes and clays in a high density polyethylene (HDPE) matrix were prepared. Two different processes preparation employed: solution or melt intercalation. montmorillonite used separately: natural (MMT-Na) an organoclay (MMT-30B) it was multiwalled (MWCNT). Thermal properties evaluated by DSC TGA, mechanical nanoindentetion morphology investigated transmission electronic microscopy (TEM). Alterations 20% crystallinity...

The present paper investigates the relationship between roughness and toughening mechanisms in hybrid epoxy nanocomposites with carbon nanotubes (CNT) graphene nanoplatelets (GNPs). role of adding a block copolymer (BC) to studied systems was also investigated. were prepared by means high‐energy sonication situ polymerization. All presented higher numerical values for K Ic than untoughened systems. system containing 0.5 wt% CNTs an increase 35% compared neat epoxy, nanocomposite, at...

In this study, the thermal, dynamic-mechanical and tribological behavior of nanocomposites a photocurable epoxy-acrylate resin multiwalled carbon nanotubes (MWCNT) are investigated. A route consisting combination sonication, mechanical magnetic stirring is used to disperse 0.25-0.75 wt. (%) MWCNT into resin. Two photocuring cycles using 12 hours 24 UV-A radiation studied. The storage modulus, loss modulus tan delta obtained by dynamic analysis. Thermal stability investigated...

In this paper, nanocomposites with multiwalled carbon nanotubes (MWCNT) or graphene nanosheets were prepared using a high density polyethylene (HDPE) matrix. Two different processes employed: solution method and melt mixing method. The crystallinity index of the HDPE showed similar levels in after addition nanotubes. It can be seen that preparation process modified degree matrix nanosheets. Nanocomposites by decrease index. led to an increase Young's Modulus MWCNT quantity, regardless used,...

ABSTRACT With the increased interest in thermoset resin nanocomposites, it is important to understand effects of material on nanoscale characteristics. In this study, a curing reaction an epoxy resin, which contained 0.25, 0.50, or 1.00 wt % multiwalled carbon nanotubes (MWCNTs), at different heating rates was monitored by differential scanning calorimetry; cure kinetics were also evaluated establish relationship between crosslinking (network formation) and mechanical properties. MWCNT...

In this work, nanocomposites with simultaneous dispersion of multiwalled carbon nanotubes (MWCNT) and montmorillonite clays in an epoxy matrix were prepared by situ polymerization. A high energy sonication was employed as the method, without aid solvents process. The (CNT) different polymeric matrices has shown a synergic potential increasing mechanical properties electrical conductivity. Two used: natural (MMT‐Na + ) organoclay (MMT‐30B). had their conductivity ( σ dielectric constant ε r...

Abstract The aim of this study was to evaluate the role different poly(ethylene glycol):poly(propylene glycol) (PEG:PPG) molar ratios in a triblock copolymer cure kinetics, miscibility and thermal mechanical properties an epoxy matrix. poly(propylene glycol)‐ block ‐poly(ethylene ‐poly(propylene (PPG‐ b ‐PEG‐ ‐PPG) copolymers used had two molecular masses: 3300 2000 g mol −1 . mass concentration PEG structure played key kinetics blend as well thermal–mechanical properties. Phase separation...