Clay loading effect

Effect of Clay Loading in HDPE/Clay (Fortiflex A60-70R/Hydrite 10) Composites... 

Fig. 4 Effect of nanoclay loading on neat SEBS a Lorentz -corrected SAXS profiles (vertically shifted for better clarity) showing effect of nanoclay arrows indicate peak positions, b Lengths corresponding to first- and second- order scattering vector positions along with the 2D SAXS patterns for each sample of clay-loaded nanocomposites...

Maji et al. [136] have examined the effect of 30B loading on the mechanical properties of hyperbranched polyurethane (PU) nanocomposites. The extent of clay loading was varied from 2 to 16 phr. The nanocomposite containing 8 wt% 30B clay shows a 100% increase in the tensile strength as compared to unmodi-fied-clay-filled samples. Above 8 wt% clay loading, the mechanical properties decrease. The efficiency and good dispersion of 30B in the hyperbranched PU40... 

Wahlberg, et al., (7) report very similar loading effects on a calcium montmorillonite. The value of Pgy- they report for their clay at trace Sr(II), from 0.01 M Ca(II), is about 40% higher than the value in Figure 7. 

Calcium Form of Montmorillonite. Cs" " Figure 12 summarizes measurements of P g as a function of Ca(II) concentration. The strong loading effect evident in Figure 5 at low fractions of the clay in the cesium form are manifest in Figure 12 in the differences between results at trace loadings and at loadings over a few... 

The results are reported of an in depth study of the structure, thermal properties, dynamic mechanical properties, flammability and smoke properties of melt blended PVC-sodium montmorillonite nanocomposites. Investigative properties employed included X-ray diffraction, TEM, TGA, DMA and cone calorimetry. The effects of clay loading, DOP concentration, annealing, blending time and molec.wt. on the formation of the composites are discussed and fire properties of PVC-organically modified clay and PVC-sodium clay nanocomposites are presented and discussed. 15 refs. USA... 

Intercalated and partially exfoliated PVC-clay nanocomposites were produced by melt blending in the presence and absence of DOP and characterised by X-ray diffraction and transmission electron microscopy. The effects of various factors, including volume fraction of clay, plasticiser content, melt compounding time and annealing, on nanocomposite structure and the thermal and mechanical properties of the nanocomposites were also examined. It was found that the best mechanical properties were achieved at 2% clay loading and 5 to 10% DOP loading. 18 refs. 

The latter contribution is the most sensitive to concentration, sharply increasing above the percolation threshold, (pxpp. Experimentally, was determined by plotting low-frequency G values versus clay content. At

rheological behavior was observed, whereas above it, (p xpp, the behavior was solidlike. The stress overshoot at startup increased with clay loading and deformation rate, and it was scaled by strain. Similarly, the stress overshoot after a rest period in the intercalated CPNC also scaled with strain hence, the randomizing Brownian motion has a small effect on the behavior of these systems. 

Shear modulus and failure shear stress in undrained static loading are reduced by undrained cyclic loading. Effective shear stress parameters C and ( ) are not influenced by undrained cyclic loading for overconsolidated clay. For normally consolidated clay C seems to increase. For both normally consolidated and overconsolidated clays, cyclic loading will influence the pore pressure response to undrained static loading. 

It is known that conducting polymers provide beneficial protection to various kinds of metals in a corrosive environment [443-445]. Over the past decades, conducting polymers have been considered as the potential candidate for effective corrosion protection without the use of heavy metals. It was found that PPy-clay nanocomposites with low clay loading (e.g., 1.0 wt%) provided an enhanced corrosion protection effect on cold-rolled steel compared with pristine PPy [446]. Similarly, PANI-clay nanocomposites exhibited a better anticorrosion performance than conventional PANI [447]. In the... 

Figure 7.13 Effect of clay loading on tensile properties of rubbery epoxy network tensile strength ( - - ) and % elongation at break (- - -). Reprinted from D. Ratna, B.C. Chakraborty, H. Dutta and A.K. Banthia, Polymer Engineering and Science, 2006, 46,1667 2006, John Wiley and Sons Publishers...

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