Epoxy resins filled

Xu, Z.N., Losur, S., and Gardner, S.D., Epoxy resin filled with tire rubber particles modified by plasma surface treatment, J. Adv. Mater., 30, 11, 1998. 

Table 4.12 Thermal Conductivity of Epoxy Resin Filled with Various Compounds...

In some reports83,84) the change in the fractional free-volume was calculated at temperatures above Tg for epoxy resin filled with polystyrene particles on the basis of the experimental value of the reduction factor aT and the universal value fg according to the equation... 

The use of the above equations is shown in Fig. 25 where the calculated and measured [45] Young s modulus of a crosslinked epoxy resin filled with silica (Si02) particles are compared. The elastic properties of the filler and matrix are [44]... 

Covers a two-part epoxy-resin system in the form of a bisphenol "A" epoxy resin filled with fumed silica and carbon microspheres and a separate aromatic diamine curing agent. 

Figure 5.32. Conductivity of epoxy resin filled with silver coated glass beads vs. volume concentration. [Adapted, by permission, from Lekatou A, Faidi S E, Lyon S B, Newman R C, J. Mat. Res., 11, No.5, 1996, 1293-304.1...

Samples of epoxy resin filled with glass microspheres have a reduced elastic modulus after water immersion. The loss of elastic modulus is more pronounced as... 

Major results. Figure 14.7 shows that the resistivity of aluminum-filled PMMA changes abruptly. Smaller volumes of filler contribute a little to resistivity but, after certain threshold value of filler concentration, further additions have little contribution. A similar relationship was obtained for nickel powder the only difference is in the final value of resistivity, which was lower for nickel due to its higher conductivity. The same conclusions can be obtained from conductivity deteiminations of epoxy resins filled with copper and nickel. Figure 14.8 shows the effect of temperature on the electric conductivity of butyl rubber filled with different grades of carbon black. In both cases, conductivity decreases with temperature, but lamp black is substantially more sensitive to temperature changes. Even more pronounced changes with temperature were detected for the dielectric loss factor and dissipation factor for mineral filled epoxy." ... 

Some linear-elastic results were obtained for direct comparison with experimental values of mechanical properties available in the literature. The materials were rubber-toughened epoxy resin (5) and epoxy resin filled with glass beads (22). The material properties used for these analyses are shown in Table II. 

The predictions for the values of v for epoxy resin filled with glass beads have been repeated using the spherical-material model. The predictions from the two models are compared with experimental values in Figure 5. The values predicted using the spherical-material model are far closer to the experimental values than the values predicted using the cylindrical model. The better fit of the spherical-material model is particularly marked in the higher range of volume fraction. 

Figure 5. Comparison of experimental and predicted values of the Poisson ratio of epoxy resin filled with glass beads. Experimental values are shown with error bars, and predicted values were obtained from the two material models.

Figure 3. Thermal shock test result for 178 phr epoxy resin filled with SiC. Key O, crack initiation and propagation from the notch , no crack propagation.

Polyester and epoxy resins filled with glass fibers... 

The addition of mineral fillers such as silica to a resin usually reduces the thermal expansion coefficient considerably. One electrical consequence of thermal expansion in particulate filled resins has been demonstrated by StrUmpler et al. [15]. Epoxy resin filled with the hard filler, titanium diboride, TiBj, show enormous but reversible changes in electrical resistivity (by eight orders of magnitude) on heating from ambient temperature to the cure temperature. This is a consequence of thermal expansion affecting interparticle contacts. 

Nak Nakamura, Y., Yamaguchi, M., Okubo, M., Matsumoto, T. Effect of particle size on mechanical properties of epoxy resin filled with angular-shaped silica. J. Appl. Polym. Sci. 44 (1992) 151-158. 

Fig. 4.4 Dependences of the normalized shear moduli of epoxy resin filled with glass heterogeneities on the volume fraction of filler f. curves 1 and 5 are for particle aspect ratio...

A typical example of recent studies of time-temperature-modulus relationships may be found in papers by Moehlenpah et al. (1970, 1971), who examined crosslinked epoxy resins filled with glass beads, fibers, or air bubbles. The initial tangent modulus in compression was seen to increase with a decrease in strain rate flexural and tensile moduli were reported to behave in a similar fashion. The WLF shift factor was essentially independent of the type of filler used and of the mode of loading. Kerner s equation was found to hold for the particulate composites in the glassy range. 

Although little research has been reported on the effects of fillers on crack propagation rates, DiBenedetto (1973) and Peretz and DiBenedetto (1972) have investigated the behavior of rapidly growing cracks in epoxy resins filled with glass beads and in a rubber-modified epoxy resin. In both the unfilled and the bead-filled resins, the terminal crack velocity... 

Epoxy resin filled with quartz flour 40-85 — 840-1130... 

Tang et at [36] investigated the mechanical properties of epoxy resins filled with different amoxmts of soft rubber particles and/or rigid silica nanoparticles, with special focus on the related mechanical and fracture behaviors. Additionally, increases in fracture toughness by the rigid particles addition in polypropylene [37,38] and polyethylene [38, 39] were addressed in some researches. 

Syntactic foam is generally a closed-cell type of foam that has greater resistance to liquids than conventional foams. Syntactic foams do not swell or change size when immersed in liquids. Syntactic foams are also generally not as compressible as other foam materials. A popular example of syntactic foam is an epoxy resin filled... 

Composites Based on Epoxy Resins Filled with... 

COMPOSITES BASED ON EPOXY RESINS FILLED WITH MODIFIED BENTONITE... 

Thermal, mechanical chemical and fracture properties of epoxy resins filled with alumina particles have been analyzed as a function of average filler size, size distribution, particle shape, loading and epoxy cross-link density (McGrath et al, 2008). The authors have shown that the density of cross-link and the amount of filler were the most important variables, modifying all properties, while other parameters (i.e. particle size, shape and size distribution) have little impact on the final properties. 

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