Salami-like morphology

Figure 19 Transmission electron micrographs of thin sections cut from ABS materials. The rubbery domains appear darker, (a) An ABS material prepared by bulk polymerization showing the characteristic salami-like morphology of the toughening particl which contain several SAN domains within the rubber, (b) ABS materials prepared by emulsion polymerization showing cote-shell partides (i) widi and (ii) widiout subinclusions. (Reproduced with permission from ref. 29.)...

In addition to co-continuous morphology, droplet-within-droplet (composite droplets, subinclusion, salami-like) morphologies are sometimes formed in blends with a higher content of minor component (see Fig. 6) (70,82). In some systems, ribbon like or stratified morphology was detected instead of classic co-continuous one (75). Rules for formation of individual types of morphology have not been formulated so far. 

Morphology of a ternary system of PP-Ox/PS-Ox (2/1 by wt.) plus hyperbranched polymer (HBP, 5 wt%) obtained by simultaneous mixing for 5 min (A) or 30 min (B). The HBP enriches in the (bright) PS phase resulting in a salami-like phase in phase morphology. (DACA Micro Compounder SEM, cryocut, HBP etched out with NaOH solution.) (From J. Pionteck, P. Potschke, N. Proske, H. Zhao, H. Malz, D. Beyerlein, U. Schulze, and B. Voit, Macromol. Symp. 198,209-220,2003. With permission.)... 

There are some interesting types of structure or morphology, which are named after culinary products, like shish kebab structures (from schaschlik) in PE and PP or salami particles in HIPS. They are listed in Part III in Table 4. 

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