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ABSTRACT:In this article, the dynamic mechanical properties of a multiphase system containing a dispersed phase with complex morphology is discussed with respect to the microstucture of the dispersed phase. The samples are prepared by emulsion blending of matrix particles (MP ) and particles for a dispersed phase that are obtained with heterocoagulation techniques. The heterocoagulated particles were prepared using two kinds of particles of different sizes: small negative particles ( SP) and large amphoteric particles ( LP ) , taking advantage of their opposite surface charge in the colloidal state. To vary compatibility between SP and LP, two kinds of small particles were used: poly ( methyl methacrylate -butyl acrylate-acrylic acid ) and poly( styrenebutyl acrylate -acrylic acid ) ( SP-M and SP-S ) . Dynamic mechanical behavior of simple blends composed of MP and SP were also measured to examine the effect of microstucture.

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