Among the characteristics in the formed coating, the effective aspect ratio of the clay is perhaps the most critical, which is highly dependent on the degree of clay exfoliation in the coating.
Estimations of effective aspect ratio are possible with the aid of model predictions.
Elimination of agglomerates and improvements to the overall extent of exfoliation within coatings are the most critical elements in maximizing effective aspect ratio of the clay and, in turn, enabling optimum barrier performance.
The effective aspect ratio of the trapezoidal structure can be calculated using the following equation:
The effective aspect ratio for the approximated structure shown in Figure 4(a) is calculated using the following equation:
Such stacks have a lower effective aspect ratio
and a lower effective Young's modulus than the completely exfoliated particles.
It may be concluded that fiber sizing, as well as the number of filaments in a bundle, has a direct bearing on the effective aspect ratio
of the reinforcing fiber, which controls the modulus and strength values of the discontinuous-fiber composites.
6] who used a simple interface model to quantify imperfect interfacial bonding and introduced the concept of an effective aspect ratio and an effective volume fraction for platelet reinforcements.
In addition, the effective aspect ratio of xGnP-1 was calculated by fitting the experimental data using the Tandon-Weng for the random case.
The effective aspect ratio is defined as the ratio of the dimension of the fiber parallel to the applied field to that of the dimension of the fiber transverse to the applied field.
3 reveals that there is less than a factor of two difference in apparent permeability for these two effective aspect ratios.
Although for long walls this difference is insignificant, for narrow walls it is a considerable change, increasing the effective aspect ratios