Particulate fillers distances

Fig. 10. The variation of the mesophase moduli Ej(r) for the various filler volume contents of iron-epoxy particulates, versus the polar distance from the filler-matrix boundary...

In many models the properties of the interphase are assumed to be constant, independent of the distance from the filler surface. However, in the case of a spontaneously formed interphase, they must change from the surface of the filler to the homogeneous matrix. Recently a model was developed which assumed an interlayer with continuously changing properties in order to describe the stress-strain behavior of particulate filled polymers [4, 86]. Stress analysis and model calculations indicated that changing interlayer properties significantly influence deformation and stress fields around the particles. A comparison with experimental... 

The size effects, large number of particulate with smaller inter particle distance and high specific surface area affects the properties of the ultimate composites. However the requisite properties are achievable for low filler content. 

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