Foaming Behaviour, Structure, and Properties of Polypropylene Nanocomposites Foams

Figure 3

Typical SEM micrographs (×25) of the (a) unfilled PP, (b) PP-CNF, and (c) PP-MMT nanocomposite foams; (d) typical TEM picture showing partial exfoliation of the MMT platelets; (e) and (f) TEM pictures showing CNF dispersion. VD: Vertical direction of foaming; WD: Width direction.

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