Kinetics fractal aggregate effect

While compaction effects may act to minimise some of the differences, it appears Likely that the differences in size and fractal properties are induced by the kinetics of aggregation of hematite particles in suspension. Slowly formed aggregates possess a cohort of sub-micron sized aggregates of relatively high fractal dimension which form a reasonably impermeable cake while rapidly formed a regates are generally of larger size and lower fractal dimension and thus create a substantially more permeable cake. 

To additionally account for the effect of the aggregate structure on the aggregation kinetics, a colhsion diameter xc is introduced which can be calculated based on the fractal dimension Z)F of the aggregate (Eq. (5)). 

Hence, the performed above analysis has shown that different solvents using in low-temperature nonequilibriiun polycondensation process can result not only in symthesized polymer quantitative characteristics change, but also in reaction mechanism and polymer chain structure change. This effect is comparable with the observed one at the same polymer receiving by methods of equilibrium and nonequilibrium polycondensation. Let us note, that the fractal analysis and irreversible aggregation models allow in principle to predict symthesized polymer properties as a function of a solvent, used in synthesis process. The stated above results confirm Al-exandrowicz s conclusion [134] about the fact that kinetics of branched polymers formation effects on their topological structures distribution and macromolecules mean shape. 

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